Materials Science › Materials Chemistry

Luminescence and Fluorescent Materials

Works Count: 38363

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This cluster of papers focuses on the phenomenon of aggregation-induced emission in fluorescent materials, exploring its applications in chemical sensors, organic nanoparticles, room-temperature phosphorescence, BODIPY dyes, mechanochromic luminescence, photodynamic therapy, triplet excited states, and bioimaging.

Keywords

Aggregation-Induced Emission; Fluorescent Materials; Chemical Sensors; Organic Nanoparticles; Room-Temperature Phosphorescence; BODIPY Dyes; Mechanochromic Luminescence; Photodynamic Therapy; Triplet Excited States; Bioimaging

Fluorescence based explosive detection: from mechanisms to sensory materials

2015-01-01

Xiangcheng Sun , Ying Wang , Yu Lei

The state-of-the-art of fluorescent materials and their sensing mechanism/properties for the detection of explosives in the recent 5 years were systematically reviewed. The state-of-the-art of fluorescent materials and their sensing mechanism/properties for the detection of explosives in the recent 5 years were systematically reviewed.

Excited-state intramolecular proton-transfer (ESIPT)-inspired solid state emitters

2015-10-27

Vikas S. Padalkar , Shu Seki

The state-of-the-art of ESIPT-inspired solid state emitters and their photophysical properties and applications in recent 5 years were systematically reviewed. The state-of-the-art of ESIPT-inspired solid state emitters and their photophysical properties and applications in recent 5 years were systematically reviewed.

Self-organization of supramolecular helical dendrimers into complex electronic materials

2002-09-26

Virgil Percec , Martin Glodde , Tushar Kanti Bera +7 more

Optical explosives detection: from color changes to fluorescence turn-on

2009-01-01

Meaghan E. Germain , Michael J. Knapp

The detection of chemical explosives is crucial for military and civilian safety. A confluence of chemistry and engineering continues to improve the sensitivity for several classes of explosives, and holds … The detection of chemical explosives is crucial for military and civilian safety. A confluence of chemistry and engineering continues to improve the sensitivity for several classes of explosives, and holds the promise of cheap and portable sensing. Optical and fluorescence-based sensors have been extensively researched for portable applications due to their sensitivity and portability. This tutorial review discusses chemical approaches to sensing explosives based on an optical readout, and summarizes recent advances in fluorescence strategies, including fluorescence turn-on. It is of interest to researchers working in the areas of materials chemistry or forensics.

Structural modification strategies for the rational design of red/NIR region BODIPYs

2014-01-01

Hua Lü , John Mack , Yongchao Yang +1 more

The structure–property relationships of red/NIR region BODIPY dyes is analyzed, so that trends in their photophysical properties can be readily compared. The structure–property relationships of red/NIR region BODIPY dyes is analyzed, so that trends in their photophysical properties can be readily compared.

Stimuli-Responsive Metal–Ligand Assemblies

2015-04-16

Anna J. McConnell , Christopher S. Wood , Prakash P. Neelakandan +1 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTStimuli-Responsive Metal–Ligand AssembliesAnna J. McConnell, Christopher S. Wood, Prakash P. Neelakandan, and Jonathan R. Nitschke*View Author Information Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTStimuli-Responsive Metal–Ligand AssembliesAnna J. McConnell, Christopher S. Wood, Prakash P. Neelakandan, and Jonathan R. Nitschke*View Author Information Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom*Tel.: +44 1223 336324. E-mail: [email protected]Cite this: Chem. Rev. 2015, 115, 15, 7729–7793Publication Date (Web):April 16, 2015Publication History Received1 November 2014Published online16 April 2015Published inissue 12 August 2015https://pubs.acs.org/doi/10.1021/cr500632fhttps://doi.org/10.1021/cr500632freview-articleACS PublicationsCopyright © 2015 American Chemical SocietyRequest reuse permissionsArticle Views20165Altmetric-Citations872LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Ions,Ligands,Macrocycles,Metals,Pyrroles Get e-Alerts

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Synthesis, Light Emission, Nanoaggregation, and Restricted Intramolecular Rotation of 1,1-Substituted 2,3,4,5-Tetraphenylsiloles

2003-03-08

Junwu Chen , Charles Chi Wang Law , Jacky W. Y. Lam +5 more

A series of ten 2,3,4,5-tetraphenylsiloles with different 1,1-substituents [XYSi(CPh)4] were prepared, and three of these, i.e., 1,1,2,3,4,5-hexaphenylsilole [X = Y = Ph (3)], 1-ethynyl-1,2,3,4,5-pentaphenylsilole [X = Ph, Y = C⋮CH … A series of ten 2,3,4,5-tetraphenylsiloles with different 1,1-substituents [XYSi(CPh)4] were prepared, and three of these, i.e., 1,1,2,3,4,5-hexaphenylsilole [X = Y = Ph (3)], 1-ethynyl-1,2,3,4,5-pentaphenylsilole [X = Ph, Y = C⋮CH (15)], and 1,1-bis(phenylethynyl)-2,3,4,5-tetraphenylsilole [X = Y = C⋮CPh (18)], were characterized crystallographically. The ground- and excited-states of the siloles were influenced by the inductive effect of the 1,1-substituents: with an increase in their electronegativity, the absorption and emission spectra of the siloles bathochromically shifted. A simple and reliable TLC-based method was developed for measurement of the solid-state luminescence spectra of the siloles. When molecularly dissolved in common solvents at room temperature, all the siloles were practically nonemissive ("off"). When poor solvents were added, the silole molecules clustered into nanoaggregates, which turned the emission "on" and boosted the photoluminescence quantum yields by up to 2 orders of magnitude (aggregation-induced emission). The silole emission could also be greatly enhanced by increasing the viscosity and decreasing the temperature of the silole solutions. The solution thickening and cooling experiments suggest that the aggregation-induced emission is caused by the restricted intramolecular rotations of the peripheral aromatic rings upon the axes of the single bonds linked to the central silole cores.

Aggregation-induced emission: phenomenon, mechanism and applications

2009-01-01

Yuning Hong , Jacky W. Y. Lam , Ben Zhong Tang

It is textbook knowledge that chromophore aggregation generally quenches light emission. In this feature article, we give an account on how we observed an opposite phenomenon termed aggregation-induced emission (AIE) … It is textbook knowledge that chromophore aggregation generally quenches light emission. In this feature article, we give an account on how we observed an opposite phenomenon termed aggregation-induced emission (AIE) and identified the restriction of intramolecular rotation as a main cause for the AIE effect. Based on the mechanistic understanding, we developed a series of new fluorescent and phosphorescent AIE systems with emission colours covering the entire visible spectral region and luminescence quantum yields up to unity. We explored high-tech applications of the AIE luminogens as, for example, fluorescence sensors (for explosive, ion, pH, temperature, viscosity, pressure, etc.), biological probes (for protein, DNA, RNA, sugar, phospholipid, etc.), immunoassay markers, PAGE visualization agents, polarized light emitters, monitors for layer-by-layer assembly, reporters for micelle formation, multistimuli-responsive nanomaterials, and active layers in the fabrication of organic light-emitting diodes.

Fluorescent Chemosensors Based on Spiroring-Opening of Xanthenes and Related Derivatives

2011-10-31

Xiaoqiang Chen , Tuhin Pradhan , Fang Wang +2 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTFluorescent Chemosensors Based on Spiroring-Opening of Xanthenes and Related DerivativesXiaoqiang Chen†‡, Tuhin Pradhan§, Fang Wang†, Jong Seung Kim*§, and Juyoung Yoon*†View Author Information† Departments of Chemistry and … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTFluorescent Chemosensors Based on Spiroring-Opening of Xanthenes and Related DerivativesXiaoqiang Chen†‡, Tuhin Pradhan§, Fang Wang†, Jong Seung Kim*§, and Juyoung Yoon*†View Author Information† Departments of Chemistry and Nano Science and of Bioinspired Science (WCU), Ewha Womans University, Seoul 120-750, Korea‡ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China§ Department of Chemistry, Korea University, Seoul 136-701, Korea*Phone: 82-2-3277-2400 (J.Y.); 82-2-3290-3143 (J.S.K.). Fax: 82-2-3277-2384 (J.Y.); 82-2-3290-3121 (J.S.K.). E-mail: [email protected] (J.Y.); [email protected] (J.S.K.).Cite this: Chem. Rev. 2012, 112, 3, 1910–1956Publication Date (Web):October 31, 2011Publication History Received5 June 2011Published online31 October 2011Published inissue 14 March 2012https://pubs.acs.org/doi/10.1021/cr200201zhttps://doi.org/10.1021/cr200201zreview-articleACS PublicationsCopyright © 2011 American Chemical SocietyRequest reuse permissionsArticle Views23539Altmetric-Citations1780LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Fluorescence,Heterocyclic compounds,Ions,Mercury,Sensors Get e-Alerts

Bioprobes Based on AIE Fluorogens

2013-06-06

Dan Ding , Kai Li , Bin Liu +1 more

Fluorescent bioprobes are powerful tools for analytical sensing and optical imaging, which allow direct visualization of biological analytes at the molecular level and offer useful insights into complex biological structures … Fluorescent bioprobes are powerful tools for analytical sensing and optical imaging, which allow direct visualization of biological analytes at the molecular level and offer useful insights into complex biological structures and processes. The sensing and imaging sensitivity of a bioprobe is determined by the brightness and contrast of its fluorescence before and after analyte binding. Emission from a fluorophore is often quenched at high concentration or in aggregate state, which is notoriously known as concentration quenching or aggregation-caused quenching (ACQ). The ACQ effect limits the label-to-analyte ratio and forces researchers to use very dilute solutions of fluorophores. It compels many probes to operate in a fluorescence "turn-off" mode with a narrow scope of practical applications.The unique aggregation-induced emission (AIE) process offers a straightforward solution to the ACQ problem. Typical AIE fluorogens are characterized by their propeller-shaped rotorlike structures, which undergo low-frequency torsional motions as isolated molecules and emit very weakly in solutions. Their aggregates show strong fluorescence mainly due to the restriction of their intramolecular rotations in the aggregate state. This fascinating attribute of AIE fluorogens provides a new platform for the development of fluorescence light-up molecules and photostable nanoaggregates for specific analyte detection and imaging.In this Account, we review our recent AIE work to highlight the utility of AIE effect in the development of new fluorescent bioprobes, which allows the use of highly concentrated fluorogens for biosensing and imaging. The simple design and fluorescence turn-on feature of the molecular AIE bioprobes offer direct visualization of specific analytes and biological processes in aqueous media with higher sensitivity and better accuracy than traditional fluorescence turn-off probes. The AIE dot-based bioprobes with different formulations and surface functionalities show advanced features over quantum dots and small molecule dyes, such as large absorptivity, high luminosity, excellent biocompatibility, free of random blinking, and strong photobleaching resistance. These features enable cancer cell detection, long term cell tracing, and tumor imaging in a noninvasive and high contrast manner. Recent research has significantly expanded the scope of biological applications of AIE fluorogens and offers new strategies to fluorescent bioprobe design. We anticipate that future development on AIE bioprobes will combine one- or multiphoton fluorescence with other modalities (e.g., magnetic resonance imaging) or functionalities (e.g. therapy) to fully demonstrate their potential as a new generation of theranostic reagent. In parallel, the advances in molecular biology will provide more specific bioreceptors, which will enable the development of next generation AIE bioprobes with high selectivity and sensitivity for molecular sensing and imaging.

Aggregation‐Induced Emission: The Whole Is More Brilliant than the Parts

2014-06-30

Ju Mei , Yuning Hong , Jacky W. Y. Lam +3 more

"United we stand, divided we fall."--Aesop. Aggregation-induced emission (AIE) refers to a photophysical phenomenon shown by a group of luminogenic materials that are non-emissive when they are dissolved in good … "United we stand, divided we fall."--Aesop. Aggregation-induced emission (AIE) refers to a photophysical phenomenon shown by a group of luminogenic materials that are non-emissive when they are dissolved in good solvents as molecules but become highly luminescent when they are clustered in poor solvents or solid state as aggregates. In this Review we summarize the recent progresses made in the area of AIE research. We conduct mechanistic analyses of the AIE processes, unify the restriction of intramolecular motions (RIM) as the main cause for the AIE effects, and derive RIM-based molecular engineering strategies for the design of new AIE luminogens (AIEgens). Typical examples of the newly developed AIEgens and their high-tech applications as optoelectronic materials, chemical sensors and biomedical probes are presented and discussed.

Activating efficient phosphorescence from purely organic materials by crystal design

2011-02-13

Onas Bolton , Kangwon Lee , Hyong-Jun Kim +2 more

BODIPY Dyes and Their Derivatives: Syntheses and Spectroscopic Properties

2007-10-09

Aurore Loudet , Kevin Burgess

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBODIPY Dyes and Their Derivatives: Syntheses and Spectroscopic PropertiesAurore Loudet and Kevin BurgessView Author Information Department of Chemistry, Texas A & M University, P.O. Box 30012, College … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBODIPY Dyes and Their Derivatives: Syntheses and Spectroscopic PropertiesAurore Loudet and Kevin BurgessView Author Information Department of Chemistry, Texas A & M University, P.O. Box 30012, College Station, Texas 77842 Cite this: Chem. Rev. 2007, 107, 11, 4891–4932Publication Date (Web):October 9, 2007Publication History Received7 May 2007Published online9 October 2007Published inissue 1 November 2007https://pubs.acs.org/doi/10.1021/cr078381nhttps://doi.org/10.1021/cr078381nresearch-articleACS PublicationsCopyright © 2007 American Chemical SocietyRequest reuse permissionsArticle Views77288Altmetric-Citations4345LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Absorption,Dyes and pigments,Energy transfer,Fluorescence,Pyrroles Get e-Alerts

Polymer-encapsulated organic nanoparticles for fluorescence and photoacoustic imaging

2014-01-01

Kai Li , Bin Liu

In this Critical Review, we summarize the latest advances in the development of polymer encapsulated nanoparticles based on conjugated polymers and fluorogens with aggregation induced emission (AIE) characteristics, elucidate the … In this Critical Review, we summarize the latest advances in the development of polymer encapsulated nanoparticles based on conjugated polymers and fluorogens with aggregation induced emission (AIE) characteristics, elucidate the importance of matrix selection and structure–property relationship of these nanoparticles and discuss their applications in fluorescence and photoacoustic imaging.

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Acetylenic Polymers: Syntheses, Structures, and Functions

2009-08-13

Jianzhao Liu , Jacky W. Y. Lam , Ben Zhong Tang

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAcetylenic Polymers: Syntheses, Structures, and FunctionsJianzhao Liu†, Jacky W. Y. Lam†, and Ben Zhong Tang*†‡View Author Information Department of Chemistry, William Mong Institute of Nano Science and … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAcetylenic Polymers: Syntheses, Structures, and FunctionsJianzhao Liu†, Jacky W. Y. Lam†, and Ben Zhong Tang*†‡View Author Information Department of Chemistry, William Mong Institute of Nano Science and Technology, Bioengineering Graduate Program, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China, and Department of Polymer Science and Engineering, Key Laboratory of Macromolecular Synthesis and Functionalization of the Ministry of Education, Institute of Biomedical Macromolecules, Zhejiang University, Hangzhou 310027, China* To whom correspondence should be addressed. Phone: +852-2358-7375. Fax: +852-2358-1594. E-mail: [email protected]†HKUST.‡Zhejiang University.Cite this: Chem. Rev. 2009, 109, 11, 5799–5867Publication Date (Web):August 13, 2009Publication History Received10 April 2009Published online13 August 2009Published inissue 11 November 2009https://pubs.acs.org/doi/10.1021/cr900149dhttps://doi.org/10.1021/cr900149dreview-articleACS PublicationsCopyright © 2009 American Chemical SocietyRequest reuse permissionsArticle Views23393Altmetric-Citations1103LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Catalysts,Hydrocarbons,Monomers,Polymerization,Polymers Get e-Alerts

Mechanically induced luminescence changes in molecular assemblies

2009-10-23

Yoshimitsu Sagara , Takashi Kato

Chemical Sensors Based on Amplifying Fluorescent Conjugated Polymers

2007-03-27

Samuel W. Thomas , Guy D. Joly , Timothy M. Swager

ADVERTISEMENT RETURN TO ISSUEPREVArticleChemical Sensors Based on Amplifying Fluorescent Conjugated PolymersSamuel W. Thomas, Guy D. Joly, and Timothy M. SwagerView Author Information Department of Chemistry, Massachusetts Institute of Technology, Cambridge, … ADVERTISEMENT RETURN TO ISSUEPREVArticleChemical Sensors Based on Amplifying Fluorescent Conjugated PolymersSamuel W. Thomas, Guy D. Joly, and Timothy M. SwagerView Author Information Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Cite this: Chem. Rev. 2007, 107, 4, 1339–1386Publication Date (Web):March 27, 2007Publication History Received22 August 2006Published online27 March 2007Published inissue 1 April 2007https://pubs.acs.org/doi/10.1021/cr0501339https://doi.org/10.1021/cr0501339research-articleACS PublicationsCopyright © 2007 American Chemical SocietyRequest reuse permissionsArticle Views34282Altmetric-Citations3897LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Conjugated polymers,Fluorescence,Polyelectrolytes,Polymers,Quenching Get e-Alerts

A dual-emissive-materials design concept enables tumour hypoxia imaging

2009-08-09

Guoqing Zhang , Gregory M. Palmer , Mark W. Dewhirst +1 more

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Aggregation-induced emission of 1-methyl-1,2,3,4,5-pentaphenylsilole

2001-01-01

Jingdong Luo , Zhiliang Xie , Jacky W. Y. Lam +7 more

Aggregation greatly boosts emission efficiency of the silole, turning it from a weak luminophor into a strong emitter. Aggregation greatly boosts emission efficiency of the silole, turning it from a weak luminophor into a strong emitter.

Carbon Dots for Multiphoton Bioimaging

2007-08-28

Li Cao , Xin Wang , Mohammed J. Meziani +7 more

Carbon nanoparticles upon simple surface passivation exhibit bright photoluminescence. Reported here is a new finding that these carbon dots are also strongly two-photon luminescent with pulsed laser excitation in the … Carbon nanoparticles upon simple surface passivation exhibit bright photoluminescence. Reported here is a new finding that these carbon dots are also strongly two-photon luminescent with pulsed laser excitation in the near-infrared. The experimentally measured two-photon absorption cross-sections are comparable to those of the high-performance semiconductor quantum dots already available in the literature. The two-photon luminescence microscopy imaging of human breast cancer cells with internalized carbon dots is demonstrated.

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Multistimuli Two-Color Luminescence Switching via Different Slip-Stacking of Highly Fluorescent Molecular Sheets

2010-09-14

Seong-Jun Yoon , Jong Won Chung , Johannes Gierschner +4 more

Color tuning and switching of the solid-state luminescence of organic materials are attractive subjects for both the fundamental research and practical applications such as optical recording. We report herein cyanostilbene-based … Color tuning and switching of the solid-state luminescence of organic materials are attractive subjects for both the fundamental research and practical applications such as optical recording. We report herein cyanostilbene-based highly luminescent molecular sheets which exhibit two-color fluorescence switching in response to pressure, temperature, and solvent vapor. The origin for the multistimuli luminescence switching is the two-directional shear-sliding capability of molecular sheets, which are formed via intermolecular multiple C−H···N and C−H···O hydrogen bonds. The resulting two distinctive crystal phases are promoted by different modes of local dipole coupling, which cause a substantial alternation of π−π overlap. These changes can be directly correlated with the subsequent intermolecular excitonic and excimeric coupling in both phases, as demonstrated by an in-depth theory-assisted spectroscopic and structural study. Finally, we have prepared a first device demonstrator for rewritable fluorescent optical recording media which showed multistimuli luminescence tuning with fast response. Our multistimuli responsive system is unique in terms of the slip-stacking of molecular sheets and thus provides a novel concept of rewritable fluorescent optical recording media.

Polymer sensors for nitroaromatic explosives detection

2006-01-01

Sarah J. Toal , William C. Trogler

Several polymers have been used to detect nitroaromatic explosives by a variety of transduction schemes. Detection relies on both electronic and structural interactions between the sensing material and the analyte. … Several polymers have been used to detect nitroaromatic explosives by a variety of transduction schemes. Detection relies on both electronic and structural interactions between the sensing material and the analyte. Quenching of luminescent polymers by electron deficient nitroaromatic explosives, such as trinitrotoluene, may be monitored to detect explosives. Resistive sensing using carbon black particles that have been coated with different organic polymers and deposited across metallic leads can also be used to detect nitroaromatic vapors in an electronic nose approach. Frequency changes in surface acoustic wave devices may be monitored to detect nitroaromatics after their adsorption into polymer coatings. Luminescent polymetalloles have recently been investigated for sensing explosives in aqueous-based solutions and for improved visual detection of trace particulates on surfaces.

Ultrafast Excited-State Dynamics in Nucleic Acids

2004-04-01

Carlos E. Crespo‐Hernández , Boiko Cohen , Patrick M. Hare +1 more

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrafast Excited-State Dynamics in Nucleic AcidsCarlos E. Crespo-Hernández, Boiko Cohen, Patrick M. Hare, and Bern KohlerView Author Information Department of Chemistry, The Ohio State University, 100 West … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUltrafast Excited-State Dynamics in Nucleic AcidsCarlos E. Crespo-Hernández, Boiko Cohen, Patrick M. Hare, and Bern KohlerView Author Information Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43214 Cite this: Chem. Rev. 2004, 104, 4, 1977–2020Publication Date (Web):April 14, 2004Publication History Received16 June 2003Published online14 April 2004Published inissue 1 April 2004https://pubs.acs.org/doi/10.1021/cr0206770https://doi.org/10.1021/cr0206770research-articleACS PublicationsCopyright © 2004 American Chemical SocietyRequest reuse permissionsArticle Views8111Altmetric-Citations1135LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Energy,Excited states,Fluorescence,Genetics,Solvents Get e-Alerts

Highly Fluorescent Semiconducting Polymer Dots for Biology and Medicine

2013-01-10

Changfeng Wu , Daniel T. Chiu

Abstract In recent years, semiconducting polymer nanoparticles have attracted considerable attention because of their outstanding characteristics as fluorescent probes. These nanoparticles, which primarily consist of π‐conjugated polymers and are called … Abstract In recent years, semiconducting polymer nanoparticles have attracted considerable attention because of their outstanding characteristics as fluorescent probes. These nanoparticles, which primarily consist of π‐conjugated polymers and are called polymer dots (Pdots) when they exhibit small particle size and high brightness, have demonstrated utility in a wide range of applications such as fluorescence imaging and biosensing. In this review, we summarize recent findings of the photophysical properties of Pdots which speak to the merits of these entities as fluorescent labels. This review also highlights the surface functionalization and biomolecular conjugation of Pdots, and their applications in cellular labeling, in vivo imaging, single‐particle tracking, biosensing, and drug delivery. We discuss the relationship between the physical properties and performance, and evaluate the merits and limitations of the Pdot probes for certain imaging tasks and fluorescence assays. We also tackle the current challenges of Pdots and share our perspective on the future directions of the field.

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Twisted Intramolecular Charge Transfer and Aggregation-Induced Emission of BODIPY Derivatives

2009-08-17

Rongrong Hu , Erik Lager , Angélica Aguilar-Aguilar +7 more

Boron dipyrromethene (BODIPY) derivatives 1 and 2 consisting of donor and acceptor units with dual photoresponses to solvent polarity and luminogen aggregation are developed through taking advantage of twisted intramolecular … Boron dipyrromethene (BODIPY) derivatives 1 and 2 consisting of donor and acceptor units with dual photoresponses to solvent polarity and luminogen aggregation are developed through taking advantage of twisted intramolecular charge transfer (TICT) and aggregation-induced emission (AIE) processes. In nonpolar solvents, the locally excited (LE) states of the BODIPY luminogens emit intense green lights. Increasing solvent polarity brings the luminogens from the LE state to the TICT state, causing a large bathochromic shift in the emission color but a dramatic decrease in the emission efficiency. The red emission is greatly boosted by aggregate formation or AIE effect: addition of large amounts of water into the solutions of 1 and 2 in the polar solvents causes the luminogens to aggregate supramolecularly and to emit efficiently. The emission can be enhanced by increasing solvent viscosity and decreasing solution temperature, indicating that the AIE effect is caused by the restriction of the intramolecular rotations in the aggregates of the luminogens.

Enhanced Emission and Its Switching in Fluorescent Organic Nanoparticles

2002-11-08

Byeong‐Kwan An , Soon‐Ki Kwon , Sang-Don Jung +1 more

A new class of organic nanoparticles (CN-MBE nanoparticles) with a mean diameter of ca. 30−40 nm, which exhibit a strongly enhanced fluorescence emission, were prepared by a simple reprecipitation method. … A new class of organic nanoparticles (CN-MBE nanoparticles) with a mean diameter of ca. 30−40 nm, which exhibit a strongly enhanced fluorescence emission, were prepared by a simple reprecipitation method. CN-MBE (1-cyano-trans-1,2-bis-(4'-methylbiphenyl)ethylene) is very weakly fluorescent in solution, but the intensity is increased by almost 700 times in the nanoparticles. Enhanced emission in CN-MBE nanoparticles is attributed to the synergetic effect of intramolecular planarization and J-type aggregate formation (restricted excimer formation) in nanopaticles. On/off fluorescence switching for organic vapor was demonstrated with CN-MBE nanoparticles.

Fluorescent Porous Polymer Films as TNT Chemosensors: Electronic and Structural Effects

1998-11-01

Jye‐Shane Yang , Timothy M. Swager

The synthesis, spectroscopy, and fluorescence quenching behavior of pentiptycene-derived phenyleneethynylene polymers, 1−3, are reported. The incorporation of rigid three-dimensional pentiptycene moieties into conjugated polymer backbones offers several design advantages for … The synthesis, spectroscopy, and fluorescence quenching behavior of pentiptycene-derived phenyleneethynylene polymers, 1−3, are reported. The incorporation of rigid three-dimensional pentiptycene moieties into conjugated polymer backbones offers several design advantages for solid-state (thin film) fluorescent sensory materials. First, they prevent π-stacking of the polymer backbones and thereby maintain high fluorescence quantum yields and spectroscopic stability in thin films. Second, reduced interpolymer interactions dramatically enhance the solubility of polymers 1−3 relative to other poly(phenyleneethynylenes). Third, the cavities generated between adjacent polymers are sufficiently large to allow diffusion of small organic molecules into the films. These advantages are apparent from comparisons of the spectroscopic and fluorescence quenching behavior of 1−3 to a related planar electron-rich polymer 4. The fluorescence attenuation (quenching) of polymer films upon exposure to analytes depends on several factors, including the exergonicity of electron transfer from excited polymer to analytes, the binding strength (polymer-analyte interactions), the vapor pressure of the analyte, and the rates of diffusion of the analytes in the polymer films. Films of 1−3 are particularly selective toward nitro-aromatic compounds. The dependence of fluorescence quenching on film thickness provides an additional criterion for the differentiation of nitro-aromatic compounds from other species, such as quinones. In short, thinner films show a larger response to nitro-aromatic compounds, but show a lower response to quinones. Such differences are explained in terms of polymer−analyte interactions, which appear to be electrostatic in nature. The rapid fluorescence response (quenching) of the spin-cast films of 1−3 to nitro-containing compounds qualifies these materials as promising TNT chemosensory materials.

The Chemistry of Fluorescent Bodipy Dyes: Versatility Unsurpassed

2007-12-18

Gilles Ulrich , Raymond Ziessel , Anthony Harriman

The world of organic luminophores has been confined for a long time to fairly standard biological labeling applications and to certain analytical tests. Recently, however, the field has undergone a … The world of organic luminophores has been confined for a long time to fairly standard biological labeling applications and to certain analytical tests. Recently, however, the field has undergone a major change of direction, driven by the dual needs to develop novel organic electronic materials and to fuel the rapidly emerging nanotechnologies. Among the many diverse fluorescent molecules, the Bodipy family, first developed as luminescent tags and laser dyes, has become a cornerstone for these new applications. The near future looks extremely bright for "porphyrin's little sister".

Bright Ideas for Chemical Biology

2008-03-01

Luke D. Lavis , Ronald T. Raines

Small-molecule fluorescent probes embody an essential facet of chemical biology. Although numerous compounds are known, the ensemble of fluorescent probes is based on a modest collection of modular "core" dyes. … Small-molecule fluorescent probes embody an essential facet of chemical biology. Although numerous compounds are known, the ensemble of fluorescent probes is based on a modest collection of modular "core" dyes. The elaboration of these dyes with diverse chemical moieties is enabling the precise interrogation of biochemical and biological systems. The importance of fluorescence-based technologies in chemical biology elicits a necessity to understand the major classes of small-molecule fluorophores. Here, we examine the chemical and photophysical properties of oft-used fluorophores and highlight classic and contemporary examples in which utility has been built upon these scaffolds.

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Advances in the Synthesis of Organoborane Polymers for Optical, Electronic, and Sensory Applications

2010-06-10

Frieder Jäkle

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAdvances in the Synthesis of Organoborane Polymers for Optical, Electronic, and Sensory ApplicationsFrieder Jäkle*View Author Information Department of Chemistry, Rutgers University Newark, Newark, New Jersey 07102* Fax: … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAdvances in the Synthesis of Organoborane Polymers for Optical, Electronic, and Sensory ApplicationsFrieder Jäkle*View Author Information Department of Chemistry, Rutgers University Newark, Newark, New Jersey 07102* Fax: +1-973-353-1264. E-mail: [email protected]Cite this: Chem. Rev. 2010, 110, 7, 3985–4022Publication Date (Web):June 10, 2010Publication History Received26 January 2010Published online10 June 2010Published inissue 14 July 2010https://pubs.acs.org/doi/10.1021/cr100026fhttps://doi.org/10.1021/cr100026freview-articleACS PublicationsCopyright © 2010 American Chemical SocietyRequest reuse permissionsArticle Views14179Altmetric-Citations1058LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Absorption,Boron,Conjugated polymers,Materials,Polymers Get e-Alerts

H- and J-Aggregate Behavior in Polymeric Semiconductors

2014-01-14

Frank C. Spano , Carlos Silva

Aggregates of conjugated polymers exhibit two classes of fundamental electronic interactions: those occurring within a given chain and those occurring between chains. The impact of such excitonic interactions on the … Aggregates of conjugated polymers exhibit two classes of fundamental electronic interactions: those occurring within a given chain and those occurring between chains. The impact of such excitonic interactions on the photophysics of polymer films can be understood using concepts of J- and H-aggregation originally developed by Kasha and coworkers to treat aggregates of small molecules. In polymer assemblies, intrachain through-bond interactions lead to J-aggregate behavior, whereas interchain Coulombic interactions lead to H-aggregate behavior. The photophysics of common emissive conjugated polymer films are determined by a competition between intrachain, J-favoring interactions and interchain, H-favoring interactions. We review formalisms describing absorption and photoluminescence lineshapes, based on intra- and intermolecular excitonic coupling, electron-vibrational coupling, and correlated energetic disorder. Examples include regioregular polythiophenes, pheneylene-vinylenes, and polydiacetylene.

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Stabilizing triplet excited states for ultralong organic phosphorescence

2015-04-03

Zhongfu An , Chao Zheng , Ye Tao +7 more

Recent advances in organic mechanofluorochromic materials

2012-01-01

Zhenguo Chi , Xiqi Zhang , Bingjia Xu +5 more

Mechanofluorochromic materials, which are dependent on changes in physical molecular packing modes, have attracted considerable interest over the past ten years. In this review, recent progress in the area of … Mechanofluorochromic materials, which are dependent on changes in physical molecular packing modes, have attracted considerable interest over the past ten years. In this review, recent progress in the area of pure organic mechanofluorochromism is summarized, and majority of the reported organic mechanofluorochromic systems are discussed, along with their derived structure–property relationships. The existence of a structural relationship between aggregation-induced emission compounds and mechanofluorochromism is recognized based on our recent results, which considered aggregation-induced emission compounds as a well of mechanofluorochromic materials. The established structure–property relationship will guide researchers in identifying and synthesizing more mechanofluorochromic materials.

Photon upconversion based on sensitized triplet–triplet annihilation

2010-02-02

Tanya N. Singh-Rachford , Felix N. Castellano

AIE macromolecules: syntheses, structures and functionalities

2014-01-01

Rongrong Hu , Nelson L. C. Leung , Ben Zhong Tang

A comprehensive review of macromolecules with aggregation-induced emission attributes is presented, covering the frontiers of syntheses, structures, functionalities and applications. A comprehensive review of macromolecules with aggregation-induced emission attributes is presented, covering the frontiers of syntheses, structures, functionalities and applications.

Perylene bisimide dyes as versatile building blocks for functional supramolecular architectures

2004-01-01

Frank Würthner

Perylene bisimide dyes and their organization into supramolecular architectures through hydrogen-bonding, metal ion coordination and pi-pi-stacking is discussed; further self-assembly leading to nano- and meso-scopic structures and liquid-crystalline compounds is … Perylene bisimide dyes and their organization into supramolecular architectures through hydrogen-bonding, metal ion coordination and pi-pi-stacking is discussed; further self-assembly leading to nano- and meso-scopic structures and liquid-crystalline compounds is also addressed.

Biosensing by luminogens with aggregation-induced emission characteristics

2014-11-06

Ryan T. K. Kwok , Chris Wai Tung Leung , Jacky W. Y. Lam +1 more

This tutorial review outlines the concept of aggregation-induced emission and its utility in biosensing applications. This tutorial review outlines the concept of aggregation-induced emission and its utility in biosensing applications.

Aggregation-induced emission

2011-01-01

Yuning Hong , Jacky W. Y. Lam , Ben Zhong Tang

Luminogenic materials with aggregation-induced emission (AIE) attributes have attracted much interest since the debut of the AIE concept in 2001. In this critical review, recent progress in the area of … Luminogenic materials with aggregation-induced emission (AIE) attributes have attracted much interest since the debut of the AIE concept in 2001. In this critical review, recent progress in the area of AIE research is summarized. Typical examples of AIE systems are discussed, from which their structure–property relationships are derived. Through mechanistic decipherment of the photophysical processes, structural design strategies for generating new AIE luminogens are developed. Technological, especially optoelectronic and biological, applications of the AIE systems are exemplified to illustrate how the novel AIE effect can be utilized for high-tech innovations (183 references).

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BODIPY-based probes for the fluorescence imaging of biomolecules in living cells

2015-01-01

Toshiyuki Kowada , Hiroki Maeda , Kazuya Kikuchi

This review covers recent advances in the development of BODIPY-based fluorescent probes for biological studies. This review covers recent advances in the development of BODIPY-based fluorescent probes for biological studies.

Aggregation-Induced Emission: Together We Shine, United We Soar!

2015-10-22

Ju Mei , Nelson L. C. Leung , Ryan T. K. Kwok +2 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAggregation-Induced Emission: Together We Shine, United We Soar!Ju Mei†‡, Nelson L. C. Leung†‡, Ryan T. K. Kwok†‡, Jacky W. Y. Lam†‡, and Ben Zhong Tang*†‡§View Author Information† … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTAggregation-Induced Emission: Together We Shine, United We Soar!Ju Mei†‡, Nelson L. C. Leung†‡, Ryan T. K. Kwok†‡, Jacky W. Y. Lam†‡, and Ben Zhong Tang*†‡§View Author Information† HKUST-Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen 518057, China‡ Department of Chemistry, HKUST Jockey Club Institute for Advanced Study, Institute of Molecular Functional Materials, Division of Biomedical Engineering, State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China§ Guangdong Innovative Research Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China*E-mail: [email protected]. Telephone: +852-2358-7375. Fax: +852-2358-1594.Cite this: Chem. Rev. 2015, 115, 21, 11718–11940Publication Date (Web):October 22, 2015Publication History Received5 May 2015Published online22 October 2015Published inissue 11 November 2015https://pubs.acs.org/doi/10.1021/acs.chemrev.5b00263https://doi.org/10.1021/acs.chemrev.5b00263review-articleACS PublicationsCopyright © 2015 American Chemical SocietyRequest reuse permissionsArticle Views143583Altmetric-Citations6317LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Fluorescence,Luminescence,Molecules,Phenyls,Probes Get e-Alerts

Recent advances in twisted intramolecular charge transfer (TICT) fluorescence and related phenomena in materials chemistry

2016-01-01

Shunsuke Sasaki , Gregor P. C. Drummen , Gen‐ichi Konishi

Twisted intramolecular charge transfer (TICT) is an electron transfer process that occurs upon photoexcitation in molecules that usually consist of a donor and acceptor part linked by a single bond. Twisted intramolecular charge transfer (TICT) is an electron transfer process that occurs upon photoexcitation in molecules that usually consist of a donor and acceptor part linked by a single bond.

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Perylene Bisimide Dye Assemblies as Archetype Functional Supramolecular Materials

2015-08-13

Frank Würthner , Chantu R. Saha‐Möller , Benjamin Fimmel +3 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTPerylene Bisimide Dye Assemblies as Archetype Functional Supramolecular MaterialsFrank Würthner*, Chantu R. Saha-Möller, Benjamin Fimmel, Soichiro Ogi, Pawaret Leowanawat, and David SchmidtView Author Information Institut für Organische … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTPerylene Bisimide Dye Assemblies as Archetype Functional Supramolecular MaterialsFrank Würthner*, Chantu R. Saha-Möller, Benjamin Fimmel, Soichiro Ogi, Pawaret Leowanawat, and David SchmidtView Author Information Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany*E-mail: [email protected]Cite this: Chem. Rev. 2016, 116, 3, 962–1052Publication Date (Web):August 13, 2015Publication History Received30 March 2015Published online13 August 2015Published inissue 10 February 2016https://pubs.acs.org/doi/10.1021/acs.chemrev.5b00188https://doi.org/10.1021/acs.chemrev.5b00188review-articleACS PublicationsCopyright © 2015 American Chemical SocietyRequest reuse permissionsArticle Views40063Altmetric-Citations1318LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Dyes and pigments,Fluorescence,Oligomers,Self organization,Substituents Get e-Alerts

Water-Soluble Conjugated Polymers for Imaging, Diagnosis, and Therapy

2012-06-06

Chunlei Zhu , Libing Liu , Qiong Yang +2 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTWater-Soluble Conjugated Polymers for Imaging, Diagnosis, and TherapyChunlei Zhu, Libing Liu, Qiong Yang, Fengting Lv, and Shu Wang*View Author Information Beijing National Laboratory for Molecular Sciences, Key … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTWater-Soluble Conjugated Polymers for Imaging, Diagnosis, and TherapyChunlei Zhu, Libing Liu, Qiong Yang, Fengting Lv, and Shu Wang*View Author Information Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China*Email: [email protected]Cite this: Chem. Rev. 2012, 112, 8, 4687–4735Publication Date (Web):June 6, 2012Publication History Received15 July 2011Published online6 June 2012Published inissue 8 August 2012https://pubs.acs.org/doi/10.1021/cr200263whttps://doi.org/10.1021/cr200263wreview-articleACS PublicationsCopyright © 2012 American Chemical SocietyRequest reuse permissionsArticle Views22953Altmetric-Citations1072LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Cells,Fluorescence,Fluorescence imaging,Peptides and proteins,Polymers Get e-Alerts

Design Strategies for Water-Soluble Small Molecular Chromogenic and Fluorogenic Probes

2013-09-11

Xiaohua Li , Xinghui Gao , Wen Shi +1 more

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTDesign Strategies for Water-Soluble Small Molecular Chromogenic and Fluorogenic ProbesXiaohua Li*, Xinghui Gao, Wen Shi, and Huimin Ma*View Author Information Beijing National Laboratory for Molecular Sciences, Key … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTDesign Strategies for Water-Soluble Small Molecular Chromogenic and Fluorogenic ProbesXiaohua Li*, Xinghui Gao, Wen Shi, and Huimin Ma*View Author Information Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China*E-mail: [email protected] (H.M.M.).*E-mail: [email protected] (X.H.L.).Cite this: Chem. Rev. 2014, 114, 1, 590–659Publication Date (Web):September 11, 2013Publication History Received19 December 2012Published online11 September 2013Published inissue 8 January 2014https://pubs.acs.org/doi/10.1021/cr300508phttps://doi.org/10.1021/cr300508preview-articleACS PublicationsCopyright © 2013 American Chemical SocietyRequest reuse permissionsArticle Views28076Altmetric-Citations1558LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Analytical apparatus,Fluorescence,Fluorescence detection,Mercury,Probes Get e-Alerts

Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes

2015-07-09

Vivian Wing‐Wah Yam , Vonika Ka‐Man Au , Sammual Yu‐Lut Leung

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTLight-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal ComplexesVivian Wing-Wah Yam*, Vonika Ka-Man Au, and Sammual Yu-Lut LeungView Author Information Institute of Molecular Functional Materials … ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTLight-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal ComplexesVivian Wing-Wah Yam*, Vonika Ka-Man Au, and Sammual Yu-Lut LeungView Author Information Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China*E-mail: [email protected]Cite this: Chem. Rev. 2015, 115, 15, 7589–7728Publication Date (Web):July 9, 2015Publication History Received5 February 2015Published online9 July 2015Published inissue 12 August 2015https://pubs.acs.org/doi/10.1021/acs.chemrev.5b00074https://doi.org/10.1021/acs.chemrev.5b00074review-articleACS PublicationsCopyright © 2015 American Chemical SocietyRequest reuse permissionsArticle Views23994Altmetric-Citations1311LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Crystal structure,Excited states,Gold,Ligands,Luminescence Get e-Alerts

Solvatochromic and Fluorogenic Dyes as Environment-Sensitive Probes: Design and Biological Applications

2017-01-09

Andrey S. Klymchenko

ConspectusFluorescent environment-sensitive probes are specially designed dyes that change their fluorescence intensity (fluorogenic dyes) or color (e.g., solvatochromic dyes) in response to change in their microenvironment polarity, viscosity, and molecular … ConspectusFluorescent environment-sensitive probes are specially designed dyes that change their fluorescence intensity (fluorogenic dyes) or color (e.g., solvatochromic dyes) in response to change in their microenvironment polarity, viscosity, and molecular order. The studies of the past decade, including those of our group, have shown that these molecules become universal tools in fluorescence sensing and imaging. In fact, any biomolecular interaction or change in biomolecular organization results in modification of the local microenvironment, which can be directly monitored by these types of probes. In this Account, the main examples of environment-sensitive probes are summarized according to their design concepts. Solvatochromic dyes constitute a large class of environment-sensitive probes which change their color in response to polarity. Generally, they are push–pull dyes undergoing intramolecular charge transfer. Emission of their highly polarized excited state shifts to the red in more polar solvents. Excited-state intramolecular proton transfer is the second key concept to design efficient solvatochromic dyes, which respond to the microenvironment by changing relative intensity of the two emissive tautomeric forms. Due to their sensitivity to polarity and hydration, solvatochromic dyes have been successfully applied to biological membranes for studying lipid domains (rafts), apoptosis and endocytosis. As fluorescent labels, solvatochromic dyes can detect practically any type of biomolecular interactions, involving proteins, nucleic acids and biomembranes, because the binding event excludes local water molecules from the interaction site. On the other hand, fluorogenic probes usually exploit intramolecular rotation (conformation change) as a design concept, with molecular rotors being main representatives. These probes were particularly efficient for imaging viscosity and lipid order in biomembranes as well as to light up biomolecular targets, such as antibodies, aptamers and receptors. The emerging concepts to achieve fluorogenic response to the microenvironment include ground-state isomerization, aggregation-caused quenching, and aggregation-induced emission. The ground-state isomerization exploits, for instance, polarity-dependent spiro-lactone formation in silica-rhodamines. The aggregation-caused quenching uses disruption of the self-quenched dimers and nanoassemblies of dyes in less polar environments of lipid membranes and biomolecules. The aggregation-induced emission couples target recognition with formation of highly fluorescent dye aggregates. Overall, solvatochromic and fluorogenic probes enable background-free bioimaging in wash-free conditions as well as quantitative analysis when combined with advanced microscopy, such as fluorescence lifetime (FLIM) and ratiometric imaging. Further development of fluorescent environment-sensitive probes should address some remaining problems: (i) improving their optical properties, especially brightness, photostability, and far-red to near-infrared operating range; (ii) minimizing nonspecific interactions of the probes in biological systems; (iii) their adaptation for advanced microscopies, notably for superresolution and in vivo imaging.

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Organic long persistent luminescence

2017-09-29

Ryota Kabe , Chihaya Adachi

The influence of the molecular packing on the room temperature phosphorescence of purely organic luminogens

2018-02-20

Jie Yang , Xu Zhen , Bin Wang +7 more

Abstract Organic luminogens with persistent room temperature phosphorescence (RTP) have attracted great attention for their wide applications in optoelectronic devices and bioimaging. However, these materials are still very scarce, partially … Abstract Organic luminogens with persistent room temperature phosphorescence (RTP) have attracted great attention for their wide applications in optoelectronic devices and bioimaging. However, these materials are still very scarce, partially due to the unclear mechanism and lack of designing guidelines. Herein we develop seven 10-phenyl-10H-phenothiazine-5,5-dioxide-based derivatives, reveal their different RTP properties and underlying mechanism, and exploit their potential imaging applications. Coupled with the preliminary theoretical calculations, it is found that strong π–π interactions in solid state can promote the persistent RTP. Particularly, CS-CF 3 shows the unique photo-induced phosphorescence in response to the changes in molecular packing, further confirming the key influence of the molecular packing on the RTP property. Furthermore, CS-F with its long RTP lifetime could be utilized for real-time excitation-free phosphorescent imaging in living mice. Thus, our study paves the way for the development of persistent RTP materials, in both the practical applications and the inherent mechanism.

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Aggregation‐Induced Emission: New Vistas at the Aggregate Level

2020-02-12

Zheng Zhao , Haoke Zhang , Jacky W. Y. Lam +1 more

Aggregation-induced emission (AIE) describes a photophysical phenomenon in which molecular aggregates exhibit stronger emission than the single molecules. Over the course of the last 20 years, AIE research has made … Aggregation-induced emission (AIE) describes a photophysical phenomenon in which molecular aggregates exhibit stronger emission than the single molecules. Over the course of the last 20 years, AIE research has made great strides in material development, mechanistic study and high-tech applications. The achievements of AIE research demonstrate that molecular aggregates show many properties and functions that are absent in molecular species. In this review, we summarize the advances in the field of AIE and its related areas. We specifically focus on the new properties of materials attained by molecular aggregates beyond the microscopic molecular level. We hope this review will inspire more research into molecular ensembles at and beyond the meso level and lead to the significant progress in material and biological science.

Room-temperature phosphorescence from organic aggregates

2020-08-18

Weijun Zhao , Zikai He , Ben Zhong Tang

Polymers Microspheres as Colorful Ultralong Organic Phosphorescence Delivery for Printable Optical Multiplexing

2025-06-25

Wei Yao , Chen Mei , Huimin Xing +7 more | Advanced Materials

Abstract The development of ultralong organic phosphorescence (UOP) materials with programmable color is of great significance yet remains challenging for various optoelectronic applications. In this work, a novel type of … Abstract The development of ultralong organic phosphorescence (UOP) materials with programmable color is of great significance yet remains challenging for various optoelectronic applications. In this work, a novel type of polymer microspheres is presented as versatile carriers capable of regulating UOP colors through the reversible absorption and release of different phosphors. The rigid environment, facilitated by intermolecular hydrogen bonds between the aryl carboxylic acid groups of the phosphors and the crosslinked polyacrylamide (PAM) microspheres, effectively suppresses non‐radiative transitions, enabling UOP with an impressive emission lifetime of 3.68 s. Specifically, these polymer microspheres serve as dynamic carriers that can reload and release uniformly dispersed phosphors in aqueous solution, thereby rearranging intermolecular hydrogen bonds and tuning the UOP emission color across a spectrum from blue to green and red. Furthermore, by incorporating fluorescent dyes into the polymer microspheres, the UOP color range can be extended to cover the entire visible spectrum through energy transfer mechanisms. Finally, the successful application of these UOP polymer microspheres is demonstrated in optical multiplexing. This study not only proposes a novel strategy for achieving color‐tunable UOP in polymer microspheres but also broadens their potential applications in advanced optoelectronic technologies.

De novo designed bright, hyperstable rhodamine binders for fluorescence microscopy

2025-06-25

Yuda Chen , Klaus Yserentant , Kibeom Hong +7 more | bioRxiv (Cold Spring Harbor Laboratory)

De novo protein design has emerged as a powerful strategy with the promise to create new tools. The practical performance of designed fluorophore binders, however, has remained far from meeting … De novo protein design has emerged as a powerful strategy with the promise to create new tools. The practical performance of designed fluorophore binders, however, has remained far from meeting fluorescence microscopy demands. Here, we design de novo Rhodamine Binder (Rhobin) tags that combine ideal properties including size, brightness, and now adding hyperstability. Rhobin allows live and fixed cell imaging of a wide range of subcellular targets in mammalian cells. Its reversible fluorophore binding further enables live super-resolution STED microscopy with low photobleaching, as well as PAINT-type single-molecule localization microscopy. We showcase Rhobin in the extremophile Sulfolobus acidocaldarius living at 75 degrees Celsius, an application previously inaccessible by existing tags. Rhobin will serve as the basis for a new class of live cell fluorescent tags and biosensors.

Functionalized Nitrobenzothiadiazoles as Embedded Fluorescent Probes

2025-06-25

Omar M. Khdour , Christine M. Lewis , Sanjay Giridharan +1 more | The Journal of Organic Chemistry

Described herein is the synthesis and photophysical characterization of novel dipeptidomimetic fluorogenic probes. The new dipeptidomimetic cassette is based on the environment-sensitive fluorophore nitrobenzothiadiazole (NBTD) and is designed to be … Described herein is the synthesis and photophysical characterization of novel dipeptidomimetic fluorogenic probes. The new dipeptidomimetic cassette is based on the environment-sensitive fluorophore nitrobenzothiadiazole (NBTD) and is designed to be embedded within a polypeptide backbone, not attached as part of a conformationally unrestrained amino acid side chain. Compounds 1-6 were prepared to investigate the effect of introducing a methyl group at positions 5 and 6 of the nitrobenzothiadiazole scaffold on their photophysical properties. Additionally, we investigated the effect of N-methylation of the 4-amino group on their chemical and photophysical properties. The nitrobenzothiadiazole scaffold was functionalized with amino- and carboxy-termini, resulting in a conformationally restricted dipeptidomimetic scaffold (NBTD-Gly) that can potentially be embedded within peptides or proteins of interest and used as a biophysical tool for studying protein structure and function. Thus, we investigated the synthesis and photophysical properties of functionalized nitrobenzothiadiazoles (1-11). The amino-terminus of the dipeptidomimetic scaffold (NBTD-Gly) was introduced at the benzylic position of the benzothiadiazole core using Gabriel synthesis, followed by nitration. The carboxy terminus was introduced via nucleophilic aromatic substitution as part of the glycine moiety. Subsequent steps involved the removal of a phthaloyl protecting group and a condensation reaction to form protected dipeptidomimetic analogues 7-11.

Optimizing Intersystem Crossing Dynamics for Triplet–Triplet Annihilation Upconversion: Aromatic Donor Modulation in Donor–Acceptor–Heavy Atom Molecular Architectures

2025-06-23

Jun Ho Yoon , Woo Jin Choi , Jeongmin Park +7 more | The Journal of Physical Chemistry C

Differentiating Molecular Weights of Supramolecular Polymers in Lower Monomer Concentrations by Coreaction Accelerator-Regulated Electrochemiluminescence

2025-06-23

Jingke Pan , Q Duan , Zifan Lai +3 more | Analytical Chemistry

Nuclear magnetic resonance is the most conventional approach to characterizing the molecular weight (Mw) of supramolecular polymers (SPs) at high monomer concentrations. However, it remains a great challenge to determine … Nuclear magnetic resonance is the most conventional approach to characterizing the molecular weight (Mw) of supramolecular polymers (SPs) at high monomer concentrations. However, it remains a great challenge to determine SPs with lower Mw values because the increased monomer concentrations will assemble dynamically to larger SPs. In this contribution, we developed an SP-regulated electrochemiluminescence (ECL) strategy for differentiating the Mw of SPs in low monomer concentrations. It was found that the SPs with lower Mw could serve as a coreaction accelerator to provide larger electrochemically active surface areas and promote the oxidation process of coreactant tripropylamine (TPrA), resulting in improved ECL intensity. Therefore, a novel ECL platform has been successfully established to differentiate the Mw of SPs at lower monomer concentrations. Our finding not only offers a deep understanding of the SP-regulated ECL performances but also provides the possibility for differentiating the Mw of SPs via coreaction accelerator-mediated ECL, particularly in low monomer concentrations.

Graphitic carbon nitride quantum dots embedded in magnesium fluoride: Achieving blue-violet room-temperature phosphorescence for information encryption and fingerprint detection

2025-06-23

Hailiang Yang , Mingyu Xin , Longyue Zhang +5 more | Applied Surface Science

Two-Dimensional Organic Heterostructures: Design, Fabrication, and Their Integrated Optical Properties

2025-06-22

Jing Wang , Jingyang Li , Xiangxin Xue +5 more | Crystal Growth & Design

1,3,4-Oxadiazole Derivative: Gelation Induced Emission Enhancement and Triple-Channel Acid Responsive Properties

2025-06-21

Tianren Zhang , Qingyan Wang , Ming-Wen Ma +6 more | Journal of Fluorescence

Watching Vibrations Steer Electrons: Ultrafast Vibration-Induced Absorption Switching through Real-Time Orbital Modulation in a Confined Quantum System

2025-06-20

Yang Liu , Shanshan Feng , Xiufang Song +2 more | The Journal of Physical Chemistry Letters

Excess electrons (EEs), transient anionic species pivotal in radiation chemistry, catalysis, and optoelectronics, have long been stabilized via solvent interactions such as hydrogen bonding in water or polar solvent traps. … Excess electrons (EEs), transient anionic species pivotal in radiation chemistry, catalysis, and optoelectronics, have long been stabilized via solvent interactions such as hydrogen bonding in water or polar solvent traps. While these systems enable electron localization, their environmental sensitivity, limited spectral tunability, and static confinement mechanisms restrict applications requiring dynamic control. Here, we introduce a solvent-free paradigm using a supramolecular electropositive cage (C60F60) to confine and strongly couple an electron with a triatomic CO2 molecule, bypassing traditional solvation limitations. Through ab initio molecular dynamics, we uncover CO2's dual role as a nonlinear quantum actuator: Its bending vibration (∠OCO = 122-156°) steers sub-50 fs electron oscillation via synchronized s/p-orbital hybridization and polarity switching. Crucially, this vibration-EE coupling modulates the EE-orbital's symmetry, switching Laporte-forbidden (∠OCO < 133°/UV-dark) to allowed (∠OCO ≈ 133-140°/invisible-light and ∠OCO > 140°/visible-light) transitions, thereby enabling vibration-induced absorption switching spanning 380-760 nm. The C60F60 cage enhances CO2's electron affinity by 6.1 eV through noncovalent electrostatic stabilization, creating a vibrationally active yet chemically inert environment, a stark contrast to solvent-dependent systems. This platform reveals ultrafast coherence between molecular vibrations and electron redistribution, establishing a dynamic quantum confinement model in which mechanical motion directly dictates optical responses. By bridging triatomic molecular dynamics to macroscopic tunable luminescence, this work advances the design of stimuli-responsive optoelectronic materials, offering applications in wavelength-adaptive scintillators and ultrafast optical switches while redefining the role of vibrations in quantum state manipulation.

BOPAM’s Bright and Dark Excited States: Insight from Structural, Photophysical, and Quantum Chemical Investigations

2025-06-20

Ke‐Xin Yu , Thanh Chung Pham , Jianjun Huang +5 more | Molecules

BOPAM exhibits high fluorescence quantum yields, along with exceptional photostability, rendering it a promising platform for applications as fluorescence sensors. However, the development of BOPAM-based fluorophores with extended emission wavelengths … BOPAM exhibits high fluorescence quantum yields, along with exceptional photostability, rendering it a promising platform for applications as fluorescence sensors. However, the development of BOPAM-based fluorophores with extended emission wavelengths remains limited, and the underlying mechanisms of fluorescence quenching via the population of dark twisted intramolecular charge transfer (1TICT) excited states are not yet fully understood. To address these gaps, we synthesized a series of BOPAM derivatives by incorporating electron-donating groups at the boron atoms and the phenyl rings of the BOPAM core. The introduction of bromide, phenyl, and naphthyl groups preserved the intrinsic locally excited (1LE) emission of BOPAM. In contrast, the incorporation of diphenylamine (BP-DA) and triphenylamine (BP-TA) moieties resulted in a red-shifted emission, attributed to an enhanced intramolecular charge transfer (ICT) process. Notably, in acetonitrile, BP-DA exhibited weak fluorescence originating from a 1TICT state, which was populated via the S2 → 1TICT transition. Furthermore, the emission observed from BP-TA was associated with a higher-lying excited state, likely the initially populated S2 state possessing a 1LE character. These findings not only introduce novel red-emissive BOPAM-based fluorophores, but also offer valuable insights into the role of the S2 state in governing fluorescence quenching mechanisms in BOPAM derivatives.

Aggregation-induced fluorescence of borneol-based copolymers as highly specific and sensitive sensors for hazardous nitrophenols

2025-06-20

Viorica E. Podasca , Violeta Melinte , Andreea Laura Chibac-Scutaru | Journal of environmental chemical engineering

Unimolecular Micellization Strategy for Achieving NIR-II Excited Fluorophores with Enhanced Brightness in Aqueous

2025-06-20

Qinglai Yang , Zelong Li , Na Li +7 more | Research Square (Research Square)

<title>Abstract</title> Fluorescence imaging in the second near-infrared window (NIR-II) is advantageous for the in situ detection of living organisms owing to its enhanced imaging depth and high spatial-temporal resolution. The … <title>Abstract</title> Fluorescence imaging in the second near-infrared window (NIR-II) is advantageous for the in situ detection of living organisms owing to its enhanced imaging depth and high spatial-temporal resolution. The development of high-performance fluorescence probes is crucial for enhancing imaging effectiveness. NIR-II (e.g. 1064 nm) excited molecular fluorophores exhibit favorable imaging performance and biocompatibility, but are susceptible to non-radiative decay, leading to substantial fluorescence quenching in aqueous compared to the NIR-I (e.g. 808 nm) excited counterparts. Previous studies have revealed that reducing the interaction between the excited-state center of the fluorophore and water molecules is a key point for improving fluorescence quantum yield (QY) in aqueous. Herein, an innovative unimolecular micellization strategy is proposed to achieve high-brightness organic fluorescence probes with NIR-II excitation (1064 nm) and emission (1000-1700 nm) in aqueous. We designed a series of NIR-II excited star-shaped amphiphilic molecules that demonstrate the ability to self-assemble into stable unimolecular micelles (UIMs) in aqueous. Upon unimolecular micellization, the intramolecular long alkyl chains can form a compact hydrophobic layer, effectively confining intermolecular interactions and shielding the excited-state center of the fluorophore from water-induced quenching, thereby maintaining high QY in aqueous. The IR-FCT8CP UIMs exhibit absorption and emission maximum wavelengths at 979 and 1181 nm, respectively, with a high QY of 0.0501% and a molar absorption coefficient of 1.67 × 104 M−1·cm−1 in aqueous, resulting in a brightness enhancement exceeding 28-fold compared to IR-FCDP UIMs. The exceptional fluorescence properties of IR-FCT8CP UIMs enable dynamic imaging of vessels using a 1500 nm long-pass filter, revealing a distinct vessel network with an optimal signal-to-background ratio. The concept of "unimolecular micellization for spatial confinement enhancement" offers innovative insights for developing NIR-II excited molecular fluorophores to maintain high brightness and stability in physiological environments for highly efficient bioimaging.

Competitive Relaxation Pathways of Dibenzophenanthroline Isomer Emission: Charge‐Transfer, Excimer Formation

2025-06-20

Yichen Zhou , Junxiang Huang , A S Ghosh +4 more | Chemistry - An Asian Journal

Abstract The photophysical properties and excited‐state dynamics of the nonlinear heteroacene derivative DBP6 (bis‐phenylethynyl‐substituted dibenzophenanthroline) were systematically investigated through steady‐state spectroscopy, time‐resolved fluorescence measurements, and density functional theory (DFT) calculations. … Abstract The photophysical properties and excited‐state dynamics of the nonlinear heteroacene derivative DBP6 (bis‐phenylethynyl‐substituted dibenzophenanthroline) were systematically investigated through steady‐state spectroscopy, time‐resolved fluorescence measurements, and density functional theory (DFT) calculations. This study focuses on the competitive relaxation pathways after excitation to the lowest excited band of phenanthroline, that is, charge‐transfer (CT), and intramolecular benzene excimer formation, which govern its dual‐emission behavior. After excitation of the lowest excited band of dibenzophenanthroline, with λ exc = 500 nm DBP6 in DCM exhibits dominant excimer emission at 570 nm with a long‐lived fluorescence lifetime of 12 ns. This emission is attributed to stable π‐π interactions between side phenyl rings. In contrast, excitation λ exc = 440 nm leads, in addition to excimer formation, also to weak S 1 emission at 480 nm (t = 0.34 ns). Higher‐energy excitation λ exc < 370 nm reveals ultrafast CT state formation as an intermediate bridging S 1 depopulation and excimer generation. Solvent polarity‐dependent studies demonstrate a progressive red‐shift in S 1 emission (455 nm in toluene to 515 nm in ethanol) confirming CT state stabilization in polar environments. DFT simulations corroborate experimental results, predicting S 1 emission at 495 nm. By varying excitation wavelength and solvent polarity, DBP6's dual emission can be tuned, highlighting its potential for ratiometric sensing, stable organic light‐emitting diodes (OLEDs), and energy conversion systems. This work advances the understanding of nonlinear heteroacenes and provides a framework for designing optoelectronic materials with tailored excited‐state interactions.

Constructing efficient organic room-temperature phosphorescent materials and converting luminescent characteristics via methyl groups and host matrixes

2025-06-19

Chao Yang , Meiling Pan , Jianqiang Han +4 more | Dyes and Pigments

Conformation‐Dependent Luminescence and Thermal Phase Transition of Crystals of a Tetrahydropentalene Derivative Bearing Aromatic Rings with Frustrated Free Rotation

2025-06-19

Tomoki Nagaoka , Yasunori Matsui , Takuya Ogaki +2 more | Asian Journal of Organic Chemistry

Abstract Results of a study exploring the solid‐state photoluminescence properties of two crystalline polymorphs ( O ‐form (orange prisms) and R ‐form (red prisms)) of 1,4‐bis(dicyanomethylidene)‐2,2,5,5‐tetramethyl‐3,6‐bis(4‐methoxyphenyl)‐1,2,4,5‐tetrahydropentalene ( BTP‐An ) are … Abstract Results of a study exploring the solid‐state photoluminescence properties of two crystalline polymorphs ( O ‐form (orange prisms) and R ‐form (red prisms)) of 1,4‐bis(dicyanomethylidene)‐2,2,5,5‐tetramethyl‐3,6‐bis(4‐methoxyphenyl)‐1,2,4,5‐tetrahydropentalene ( BTP‐An ) are reported. The O ‐form was found to display more quantum‐efficient photoluminescence in a shorter‐wavelength region compared to that of the R ‐form . X‐ray crystallographic analysis suggests that a unique conformation with largely rotated 4‐methoxyphenyl (anisyl) groups and suppression of free rotation of the dicyanomethylene groups are likely responsible for the shorter wavelength and higher quantum yield for photoluminescence from the O ‐form . Also, the thermally metastable O ‐form undergoes a phase transition to generate the R ‐form upon either heating or exposure to organic solvent vapors.

1,7-Dithienyl and 3,5-Di-tert-Butyl Substituted aza-BODIPY with the Large Stokes Shift.

2025-06-19

Jie Lu , Ran Li , Zhenpeng Qin +2 more | PubMed

To break through the limited structure of aryl substituted aza-BODIPY at 3,5-positions, we herein, prepared the novel aza-BODIPY with the -tBu groups in 3,5-positions (tBu-azaBDP). tBu-azaBDP possesses excellent optical properties, … To break through the limited structure of aryl substituted aza-BODIPY at 3,5-positions, we herein, prepared the novel aza-BODIPY with the -tBu groups in 3,5-positions (tBu-azaBDP). tBu-azaBDP possesses excellent optical properties, especially having the large Stokes shift. The -tBu substitution promotes the nonradiative transition process and has potential to enhance photothermal conversion. Due to the advantage of large Stokes shift to avoid spectral overlap and reduce the background interference, S-tBu-azaBDP as a fluorescent probe was found to be highly selective and sensitive to Hg2+ .

Distinct mechano- and piezochromic behaviors of thermally activated delayed fluorescence（4CzTPN）crystal

2025-06-18

Yarong Gu , Long Li , Min Wu +1 more | Research Square (Research Square)

<title>Abstract</title> Incorporating mechano-luminescence (MCL) into thermally activated delayed fluorescence (TADF) molecules represents a promising strategy for developing multifunctional mechanoluminescent materials. However, the controllable utilization of the versatile properties inherent in … <title>Abstract</title> Incorporating mechano-luminescence (MCL) into thermally activated delayed fluorescence (TADF) molecules represents a promising strategy for developing multifunctional mechanoluminescent materials. However, the controllable utilization of the versatile properties inherent in TADF molecules remains challenging due to the inherent difficulties in system design. Herein, we investigate the pressure modulation of the photophysical properties of 2,3,5,6-tetrakis(carbazol-9-yl)-1,4-dicyanobenzene (4CzTPN), a representative TADF emitter, through in situ high-pressure photoluminescence (PL), time-resolved PL, UV-visible spectra and infrared spectroscopy. The different mechanisms of a blue shift by grinding crystals and of a red shift under hydrostatic pressure are fully investigated. High-pressure time-resolved measurements show that the short fluorescence lifetime decreases and the lifetime of delayed fluorescence disappears beyond 3.0 GPa. Infrared spectra indicate the style of relative intensity for the infrared absorption peak of ν(C-H) transform significantly when the pressure is greater than 3.0 GPa, which would be the cause of the disappearance of delayed fluorescence. This study enriches the insights into mechanochromic and multifunctional materials.

Tunable Emission Properties of Indolizine-Based Aggregation-Induced Emission Luminogens for White-Light Emission

2025-06-18

Taegwan Kim , Eunbee Baek , Hyunsoo Kim +5 more | JACS Au

Targeting One Precise Aggregation-Induced Emission (AIE) Mechanism to Design Indolocarbazole-Based AIE-Active Phosphorescent Pt(II) Complex and Its Anion Sensing Property

2025-06-18

Qingqing Feng , Chunliang Yang , Chenghui Wang +2 more | Inorganic Chemistry

AIE mechanisms of the restrained intramolecular rotation (RIR) and restrained molecular configuration transformation (RMCT) jointly contribute to the AIE nature of the Pt(II)(C^N)(N-donor ligand)Cl-type complex. However, focusing on one certain … AIE mechanisms of the restrained intramolecular rotation (RIR) and restrained molecular configuration transformation (RMCT) jointly contribute to the AIE nature of the Pt(II)(C^N)(N-donor ligand)Cl-type complex. However, focusing on one certain mechanism would provide more accessibilities to AIE molecular designs. Herein, by combining a rigid cyclometallating ligand 11,12-dibutyl-3-(pyridin-2-yl)-11,12-dihydroindolo[2,3-a]carbazole (ICZ-o-Py) with a rotational monodentate ligand 2-hydroxy-4-(pyridin-4-yl)benzaldehyde (L-SYQ), an AIE-active Pt(II) complex Pt-ICZ-SYQ receiving rigid coordination configuration of the Pt center is designed and synthesized. Theoretical and experimental results show that the RIR effect dominates the AIE mechanism. On the other hand, the salicylaldehyde group is selected as an ion response unit toward F-. Accordingly, the F- detection studies including the responses of absorption and turn-on emission, anti-interference ability, detection limits, sensing mechanism, and detections in the water environment as well as at solid state are fully covered. The sensing mechanism of -OH unit deprotonation is confirmed based on the 1H NMR titrations, strong base reaction experiment, and theoretical calculations. Meanwhile, by taking advantage of its AIE characteristic, a solid-phase detection platform assisted by a smartphone is further developed. Eventually, these results should offer valuable clues for the mechanism study and molecular design of AIE organometallic complexes as well as for their potential application exploring.

Red-Light-Driven Photocatalysis with NI-BODIPY-Fullerene Systems for Organic Transformations

2025-06-18

Ezel Öztürk Gündüz , Ümmügülsüm Büyükpolat , Elif Okutan | Journal of Fluorescence

Pyrimidine-based single-molecule fluorescent probe for sensing of pH, trivalent ions (Cr3+/Al3+/Fe3+), homocysteine, and hydroxyl radicals

2025-06-18

Hongbing Lu , Rui Tian , Lili Chen +3 more | Dyes and Pigments

Water-Induced Structural Instability in Zinc Coordination Polymers for Dual-Channel Fluorescent Sensing of Cu2+ and Cysteine

2025-06-18

H.K. Li , Shunxing Li , Yalin Zhang +7 more | Analytical Chemistry

Coordination polymers (CPs) have gained significant attention due to their unique structural tunability and broad application prospects. However, their instability in water remains a key challenge for practical applications. This … Coordination polymers (CPs) have gained significant attention due to their unique structural tunability and broad application prospects. However, their instability in water remains a key challenge for practical applications. This study presents a dual-channel fluorescent sensor based on water-unstable zinc coordination polymers (Zn-CPs) for the sensitive detection of copper ions (Cu2+) in water and cysteine (Cys) in serum. Zn-CPs underwent structural collapse in water, deactivating matrix coordination-induced emission (MCIE) and quenching blue fluorescence. pH adjustment activated the aggregation-induced emission (AIE) of the ligand, turning on green fluorescence. The introduction of Cu2+ facilitated the formation of zinc-copper co-coordination polymers (Zn/Cu-CPs), improving water stability while preserving blue fluorescence and inhibiting green fluorescence activation. In contrast, Cys competitively coordinated with Cu2+, preventing the formation of Zn/Cu-CPs, resulting in blue fluorescence quenching and green fluorescence activation. The sensor exhibited a linear detection range of 0.01-0.25 mg/L for Cu2+ (limit of detection: 0.0162 mg/L) and 0.5-14 μM for Cys (limit of detection: 0.4380 μM). Unlike conventional approaches that focus on enhancing water stability, this study highlights the potential of water-unstable coordination polymers in environmental and bioanalytical applications and provides new insights into the design of fluorescence sensors based on structural transformations.

Colossal Thermal Expansion and Continuous Rolling Locomotion of a Robust Flexible Molecular Single Crystal

2025-06-18

Bo Jing , Wenjie Kuang , Jinhe Li +5 more | Journal of the American Chemical Society

Amplifying microscopic or molecular perturbations to induce macroscopic mechanical effects in well-ordered molecular crystals is the foundation of the newly recognized potential of organic crystalline smart materials for soft organic … Amplifying microscopic or molecular perturbations to induce macroscopic mechanical effects in well-ordered molecular crystals is the foundation of the newly recognized potential of organic crystalline smart materials for soft organic electronics, optics, actuators, switches, and robots. Diverse molecular crystal actuators that transform external energy into mechanical motions have been prepared in the past decade, yet their spatiotemporal operational capability, adaptability, reversibility, and durability have not been fully explored. In this study, we present adaptive molecular single crystals that can respond to force, heat, and light, demonstrating mechanical flexibility, reversible expansion, and complex movements, including rolling and climbing locomotion. These crystals exhibit significant anisotropic thermal expansion within the temperature range from 303 to 413 K, expanding by approximately 4.8% along their longest axis. The exceptional flexibility and thermal expandability of this material enable quick and sustained locomotion of the single crystals when exposed to ultraviolet light. Our findings highlight the considerable yet underexplored potential of adaptive organic crystals that can be used as lightweight thermomechanical and photomechanical actuators.

Quasiracemic Crystallization of Luminescent Chiral Molecules: Mechanochromic Luminescence and Sign Inversion of Circularly Polarized Luminescence

2025-06-18

Suguru Ito , Kouki Fukuhara , Nobuchika Arakawa +2 more | Chemistry - A European Journal

The arrangement of molecules plays a crucial role in governing the luminescent properties of organic crystals. While quasiracemic crystallization, based on the co‐crystallization of two structurally similar but non‐identical enantiomeric … The arrangement of molecules plays a crucial role in governing the luminescent properties of organic crystals. While quasiracemic crystallization, based on the co‐crystallization of two structurally similar but non‐identical enantiomeric molecules, offers a promising strategy for organizing distinct species within a single crystal, its potential for tuning luminescent behavior remains largely unexplored. Herein, we have prepared quasiracemic crystals from a pair of enantiomeric binaphthyl derivatives functionalized with either ethynylnaphthalene or ethynylbenzothiadiazole groups. The molecular arrangement of the quasiracemic crystal is analogous to that of the racemic ethynylnaphthalene derivative, whereas the quasiracemic crystals exhibit mechanochromic luminescence (MCL) behavior similar to that of the racemic ethynylbenzothiadiazole derivative. Notably, the quasiracemic crystals exhibit circularly polarized luminescence (CPL), and the CPL sign is inverted relative to that of the enantiopure crystal of the ethynylbenzothiadiazole derivative. These results highlight quasiracemic crystallization as a new strategy for modulating MCL and CPL properties.

Colloidal Supramolecular Cross-Linkers: A Versatile Platform for Physical Condensation of Oligopeptide Segments into All-Underwater Adhesives

2025-06-17

Xinyan Wang , Rui Meng , Houyu Zhang +1 more | Nano Letters

The development of robust strategies capable of producing oligopeptide-based underwater adhesives constitutes a pivotal advancement toward potential bioapplications yet remains exceedingly challenging. Herein, we report a viable approach for designing … The development of robust strategies capable of producing oligopeptide-based underwater adhesives constitutes a pivotal advancement toward potential bioapplications yet remains exceedingly challenging. Herein, we report a viable approach for designing underwater adhesives through physical condensation of cationic oligopeptides mediated by colloidal supramolecular cross-linkers. The amphiphilic cholesteric acid derivatives (CADs) self-assembled into stable nanofibers adorned with highly concentrated carboxylate groups on their surface. These colloidal nanofibers functioned as multivalent cross-linkers, effectively binding cationic oligopeptides in water, generating underwater adhesives. Depending on the types of substrates, the underwater adhesion strength varied from 186.7 to 11.6 kPa. Furthermore, the shear strength showed >50% retention after 7 days of immersion in PBS solution. Crucially, the adhesion performance can be modulated by adjusting the hydrophobicity of the CADs or the peptide sequences. This study establishes a versatile design platform for peptidyl biomimetic adhesives while elucidating critical structure-function relationships for performance optimization.

Smart Fluorescence Tuning and Micelle-Stabilized White Light Emission via a Coumarin 102–Rhodamine B System: A Simple Path to Eclectic Color Luminescence for Anti-Counterfeiting Applications

2025-06-17

Firdaus Ahmad Ahanger , Ayaz Ahmad Manhas , Gousia Ahanger +7 more | ACS Applied Optical Materials

Cyclotriphosphazene-based micelle structures: synthesis, photochemical behavior and ROS production capabilities in aqueous media

2025-06-17

Elif Yıldız Gül , Bünyemin Çoşut , Esra Tanrıverdi Eçik | Journal of Molecular Structure

Counterion‐Mediated Luminophore Dimerization

2025-06-17

Ash G. Carter , Promeet K. Saha , Antara Sikder +5 more | Angewandte Chemie

Emissive organic salts have long been integral to the discovery of fluorescence phenomena and functional luminescent dyes. Typically, one component of the salt acts as the photoactive unit (luminophore) and … Emissive organic salts have long been integral to the discovery of fluorescence phenomena and functional luminescent dyes. Typically, one component of the salt acts as the photoactive unit (luminophore) and its non‐emissive counterion is selected to independently tune bulk physical properties, such as solubility. However, the impact of counterion choice on the aggregation and resulting emissive state of organic salts in solution has not been widely investigated. Here, we report that a single cationic luminophore gives rise to either monomer, dimer, excimer or multichromatic emission under otherwise identical conditions by varying only its counterion. We employ N‐methyl quininium (MeQn+) as a permanently charged cationic luminophore, which we pair with a series of monovalent anions. At low solution‐state concentrations, all the salts give identical absorption and emission spectra that correlate with the MeQn+ monomer. However, at higher concentrations, the emission, excitation and absorption data differ, revealing the presence of monomer, dimer, excimer, or all three, depending on the structure of the anion. Understanding and modulating the formation of dimeric or other well‐defined aggregated species by specific ion effects could be exploited in the design of molecular probes for biological systems or emissive thin‐film dispersions for optoelectronic devices.

Counterion‐Mediated Luminophore Dimerization

2025-06-17

A. Carter , Promeet K. Saha , Antara Sikder +5 more | Angewandte Chemie International Edition

Enabling Wholly Aromatic Triphenylamine‐Based Polyimides to Realize Bathochromic Emission

2025-06-17

Minmin Hou , Yu‐Jen Shao , Chin‐Hsuan Lin +7 more | Advanced Optical Materials

Abstract The development of wholly aromatic polyimides (Ar‐PIs) in the field of fluorescence material has long been hindered by the charge‐transfer complex (CTC) effect, typically causing weak or non‐detectable fluorescence … Abstract The development of wholly aromatic polyimides (Ar‐PIs) in the field of fluorescence material has long been hindered by the charge‐transfer complex (CTC) effect, typically causing weak or non‐detectable fluorescence intensity. Few studies have aimed to reduce the CTC effect through molecular design, enabling Ar‐PIs to exhibit blue to yellow emission in solid films with high quantum efficiency ( Φ PL ). However, current complex molecular designs pose inherent limitations for further reducing the emission energy gap toward the orange‐red regions. To address this issue, in this work, a series of triphenylamine (TPA)‐based fluorescence diimides with various electron‐donating/extended π‐conjugation pendant groups are strategically designed and synthesized to probe their emissive behaviors and the corresponding Ar‐PIs properties. Notably, along a series of new Ar‐PIs, PI‐TPE , PI‐TPPA‐TPE , and PI‐TPPA exhibit a systematic bathochromic shift emission at 540, 598, and 608 nm, respectively, in the film state, where PI‐TPPA and PI‐TPPA‐TPE fill up and realize the full‐spectrum emission by utilizing the TPA architecture.

Visible Light Excitable Room Temperature Phosphorescence Crystals Bypassing the Conventional Absorption and Intersystem Crossing

2025-06-17

Jinbin Liu , Yuxin Zhang , Lingtai Yue +3 more | Dyes and Pigments

Design and synthesis of deep-red dual-state emission triphenylamine derivatives for mechanochromism and H2S detection

2025-06-17

Fangjie Chen , Shuxia Yao , Jianli Yan +1 more | Journal of Chemical Sciences

Aggregation-Induced Emission Probe for Ratiometric Fluorescence Detection of Sodium Tetraborate on Meat Surfaces

2025-06-17

Shiwei Yang , Wanli Fan , Lulu Miao +5 more | Journal of Analysis and Testing

Elastomeric Intrinsic Optical Anti‐Counterfeiting with Dual‐Color RTP from Dual n→π* Transition and Enhanced Intersystem Crossing

2025-06-17

Xingyi Wang , R.Y. Su , Shuchang Luo +5 more | Advanced Functional Materials

Abstract Introducing N→B coordination on benzeneborate theoretically generates new n→π* transition and further usage as polymeric molecular extenders bring elastomeric intrinsic room‐temperature phosphorescence (RTP). However, low probability of phosphorescence arises … Abstract Introducing N→B coordination on benzeneborate theoretically generates new n→π* transition and further usage as polymeric molecular extenders bring elastomeric intrinsic room‐temperature phosphorescence (RTP). However, low probability of phosphorescence arises from the narrow energy gap between the n→π* transition, whose related RTP probably lacks effective intersystem crossing (ISC), and the π→π*‐transition‐based fluorescence of benzeneborate. This work designs a para ‐phenyleneborate esterified by two N→B‐coordination‐based twist‐boat–boat (TBB) rings, activating a new n→π* transition of “N,N to para ‐phenyleneborate,” with much lower transition energy than the traditional n→π* transition of “N to phenylborate,” generating first‐reported dual‐color RTP. The conformation‐fixed dual TBB ring further reduces nonradial transition and enhances ISC, thus bringing RTP‐companying triple dependency on excitation, temperature, and delay time, and then achieving 12‐level optical encryption. Using this intrinsic RTP block as elastomeric molecular extender also integrates the self‐healing properties of dynamic borate ester bonds and acid/base/waterproof from TBB‐fixing N→B precoordination, enhancing adaptability in application scenarios.

A novel phenalenone-based probe for dual-mode hydrazine detection

2025-06-16

Ecem Saygılı , Erman Kıbrıs , Sultan Sacide Gelen +3 more | Microchemical Journal

Dual-state emission of anthracene and triphenylamine functionalized E-cyanostilbene derivative with mechanochromic property

2025-06-16

Gaobin Zhang , Shuxia Yao , Mingsan Miao +3 more | Chemical Papers

Cryogenically Flexible Phosphorescent Organic Crystals that Transmit Self-Sustained Persistent Luminescence with Spatiotemporal Control

2025-06-16

Xuesong Yang , Mingqi Zhang , Baolei Tang +5 more | Journal of the American Chemical Society

Concomitant long-lived phosphorescence and cryogenic elasticity in soft matter is an immensely challenging endeavor due to the contrasting effect of low temperatures on these properties. While the low temperature normally … Concomitant long-lived phosphorescence and cryogenic elasticity in soft matter is an immensely challenging endeavor due to the contrasting effect of low temperatures on these properties. While the low temperature normally extends and enhances phosphorescence, it typically compromises mechanical elasticity by freezing the molecular motion, inevitably leading to brittleness and cracking of soft materials. In this work, we posit that the emerging class of organic crystals can overcome this intrinsic disparity and describe an organic crystalline material that meets both requirements─an exceptional elasticity of its crystals at 77 K and ultralong afterglow of up to about 30 s, the longest lifetime of a flexible organic crystal reported to date. The material, triphenylene, was prepared as elastic crystals, where the molecular rigidity and dense packing enable reversible lattice deformation and mechanical robustness on cooling, while they also result in prolonged phosphorescence at low temperatures. Crystals of this material act as dynamic phosphorescent waveguides, with their emission persisting in low temperatures and dark, demonstrating both sustained signal transmission capabilities and a unique opportunity for spatiotemporal control of the optical output. At a conceptual level, the results introduce organic crystals for time-encoded biological information transmission, providing a novel material platform for flexible, lightweight optical devices and sensors that can function in extreme environments.

Synthesis, Characterization, and Photophysical Properties of Water-Soluble AIE Chromophores Based on Alkynyl-Styrene Pt(II) Pincer Complexes Conjugated with Polyvinylpyrrolidone Using RAFT Polymerization

2025-06-16

Mozhgan Samandarsangari , Rostislav R. Shulepov , Vadim A. Baigildin +7 more | Inorganic Chemistry

A series of five Pt(II) complexes Pt1-Pt5 containing (N∧N∧C) pincer ligands and alkynyl-styrene were synthesized and characterized using mass spectrometry, NMR spectroscopy, and X-ray crystallography. The complexes exhibit phosphorescence in … A series of five Pt(II) complexes Pt1-Pt5 containing (N∧N∧C) pincer ligands and alkynyl-styrene were synthesized and characterized using mass spectrometry, NMR spectroscopy, and X-ray crystallography. The complexes exhibit phosphorescence in dilute dichloromethane solution from the excited state of mixed LLCT and MLCT character, which for all but one complex may be ascribed to emissions from isolated chromophore molecules. In contrast, in the solid state, emission occurs from the aggregated chromophores and displays a strong bathochromic shift into the NIR area, which is characteristic for aggregation-induced emission (AIE). The complexes readily take part in the RAFT polymerization reaction with polyvinylpyrrolidone to yield water-soluble amphiphilic block copolymers containing 4-6 complex molecules in the hydrophobic block. The copolymers are luminescent and display a solvent-dependent photophysical behavior. In organic solvents, their photophysical characteristics are nearly identical to those observed for the complexes in DCM, which is indicative of the absence of intramolecular aggregation in the polymeric chain. In aqueous media, the copolymer molecules form nanospecies of the micellar type, which exhibit AIE behavior due to intermolecular aggregation of the mononuclear chromophores. DFT and TD DFT calculations yield the emission parameters, which fit well with the suggested models of platinum chromophore behavior in solutions, solid state, and in the chains of block copolymers.

Structurally Diverse Triphenylamine[n]arenes with Room-Temperature Phosphorescence

2025-06-16

Lijun Mao , Min Qi , Manfei Zhou +7 more | Organic Letters

We present the design and synthesis of a series of triphenylamine[n]arenes. The incorporation of alkyl and aryl aldehydes together with paraformaldehyde introduces multiple reactive sites into the macrocyclic framework. The … We present the design and synthesis of a series of triphenylamine[n]arenes. The incorporation of alkyl and aryl aldehydes together with paraformaldehyde introduces multiple reactive sites into the macrocyclic framework. The methylenes can be oxidized to carbonyls using 3,5-dichloro-2,6-dicyano-1,4-benzoquinone (DDQ), which exhibits significantly enhanced fluorescence and room-temperature phosphorescence (RTP). This investigation provides an efficient strategy for the synthesis of RTP-active macrocyclic arenes, thereby broadening the scope of macrocyclic arene chemistry and advancing their application in luminescent materials.

Synthesis and preparation of p-terphenyl based polymer with stable fluorescence performance

2025-06-16

Gao Qing Lu , Chenglin Yi , Lingbo Hao +2 more | Journal of Macromolecular Science Part A

BODIPY-Based Fluorescent Probes and their Applications

2025-06-16

Mareechika Gaddam , Abha Sharma | CRC Press eBooks

Quinoline-Based Fluorescent Probe for Various Applications

2025-06-16

Kiran D. Pawar , Somidi Srinu , Mareechika Gaddam +1 more | CRC Press eBooks

Structural, Photophysical, and Distributed Feedback Lasing Characteristics of Furan-Substituted Thiophene/Phenylene Co-Oligomer Single Crystals

2025-06-16

Periyasamy Angamuthu Praveen , Thangavel Kanagasekaran , Chaoyan Ma +4 more | ACS Applied Materials & Interfaces

A furan derivative, 2-[1,1'-biphenyl]-4-yl-5-(5'-[1,1'-biphenyl]-4-yl-[2,2'-bithiophen]-5-yl)furan (BPFTT), was designed and synthesized and shown to have excellent optical and electronic characteristics. The synthesized compound exhibits a photoluminescence quantum yield (PLQY) of 28%. In … A furan derivative, 2-[1,1'-biphenyl]-4-yl-5-(5'-[1,1'-biphenyl]-4-yl-[2,2'-bithiophen]-5-yl)furan (BPFTT), was designed and synthesized and shown to have excellent optical and electronic characteristics. The synthesized compound exhibits a photoluminescence quantum yield (PLQY) of 28%. In addition, a field-effect transistor fabricated using this material in the active layer exhibits ambipolar mobilities of 0.54 (hole) and 0.03 (electron) cm2 V-1 s-1. Single crystals with their natural crystal edges acting as Fabry-Pérot resonators exhibit dual gain narrowing phenomena with optical pumping thresholds as low as 15 μJ/cm2. Introducing planar distributed feedback resonators reduces the threshold to 2.41 μJ/cm2, with the Q-factor reaching 1.5 × 104. The full width at half-maximum is measured to be 0.074 nm, which is an excellent value reported to date for any organic single-crystal laser.

Tough and Self-Healing Recycled Polyurethanes with Tunable Fluorescence by Chain Aggregation

2025-06-15

Pengyu Liu , Xiaochuan Ren , Xiaoyan Qiu +3 more | Macromolecules

Multimode anticounterfeiting materials based on polymers and supramolecular chemistry

2025-06-14

Moein Mohammadi‐Jorjafki , Milad Babazadeh‐Mamaqani , Reza Khalilzadeh +3 more | Progress in Polymer Science

Design, Synthesis, and Photophysical Characterization of Monoaryl-pyridine-2-ones Derivatives: Exploring Aggregation-Caused Quenching vs. Aggregation-Induced Emission

2025-06-13

Murugesan Preethi , A. Babu , Sivakumar Shanmugam | Tetrahedron

Room-Temperature phosphorescent materials constructed based on Cucurbit[8]uril for encryption and anti-counterfeiting

2025-06-13

Li Wu , Shang-Wei Yuan , Xingying Wang +5 more | Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy