Establishing the Critical Role of Oriented Aggregation in Molecular Solid State Fluorescence Enhancement
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim..
The general occurrence of fluorescence emission quenching in molecular aggregates is circumvented in select classes of molecules. This has largely been attributed to the rigidification of the molecule and its environment, which hinders non-radiative excited state energy loss through structural relaxation; since such an effect should in principle apply to most aggregates and crystals, there must clearly be other critical factors that make the select molecules exceptional. Discovery of three crystalline structures of a new push-pull molecule in its enantiomorphic and racemic forms, exhibiting not only very high, but distinctly different solid state fluorescence enhancements, has now allowed a systematic investigation of the role of intramolecular and intermolecular excited state energy loss pathways. Crystallographic, spectroscopic and computational investigations provide a detailed appraisal of the assembly patterns in the crystals, and rigorous establishment of an inverse correlation between intermolecular energy transfer and solid state fluorescence. The study provides a clear visualization of the critical role of oriented molecular aggregation in solid state fluorescence efficiency enhancement.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2018 |
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| Erschienen: |
2018 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:24 |
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| Enthalten in: |
Chemistry (Weinheim an der Bergstrasse, Germany) - 24(2018), 8 vom: 06. Feb., Seite 1784-1788 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Srujana, P [VerfasserIn] |
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| Links: |
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| Themen: |
Crystal structures |
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| Anmerkungen: |
Date Completed 07.03.2018 Date Revised 07.03.2018 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/chem.201705041 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. | ||
| 520 | |a The general occurrence of fluorescence emission quenching in molecular aggregates is circumvented in select classes of molecules. This has largely been attributed to the rigidification of the molecule and its environment, which hinders non-radiative excited state energy loss through structural relaxation; since such an effect should in principle apply to most aggregates and crystals, there must clearly be other critical factors that make the select molecules exceptional. Discovery of three crystalline structures of a new push-pull molecule in its enantiomorphic and racemic forms, exhibiting not only very high, but distinctly different solid state fluorescence enhancements, has now allowed a systematic investigation of the role of intramolecular and intermolecular excited state energy loss pathways. Crystallographic, spectroscopic and computational investigations provide a detailed appraisal of the assembly patterns in the crystals, and rigorous establishment of an inverse correlation between intermolecular energy transfer and solid state fluorescence. The study provides a clear visualization of the critical role of oriented molecular aggregation in solid state fluorescence efficiency enhancement | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a energy transfer | |
| 650 | 4 | |a fluorescence | |
| 650 | 4 | |a oriented aggregation | |
| 650 | 4 | |a solid state emission enhancement | |
| 700 | 1 | |a Radhakrishnan, T P |e verfasserin |4 aut | |
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