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Aggregation-enhance...
Aggregation-enhanced luminescence and vibronic coupling of silole molecules from first principles
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- Yin, S. (författare)
- Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing
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- Peng, Q. (författare)
- Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing
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- Shuai, Z. (författare)
- Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing
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- Fang, W. (författare)
- Department of Chemistry, Beijing Normal University
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- Wang, Yanhua (författare)
- KTH,Teoretisk kemi
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- Luo, Yi (författare)
- KTH,Teoretisk kemi
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 73:20, s. 205409-
- Relaterad länk:
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http://scitation.aip...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Aggregate formation in molecular solids usually quenches the luminescence, a piece of bad news for molecular electronic devices. However, siloles present extremely high luminescent efficiency in solid state as well as in aggregation, but have almost no luminescence in solution. By employing a first-principles calculation to study excited states and vibronic couplings, we find that it is the low-frequency twisting motions of side rings which enhance the nonradiative decay. These motions can be suppressed either by solid-state packing, by aggregation formation in polar solvents, or by increasing the solvent viscosity; thereby, the radiative decay becomes dominant, resulting in peculiar aggregate-induced emission phenomena in siloles.
Ämnesord
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
Nyckelord
- RESTRICTED INTRAMOLECULAR ROTATION; LIGHT-EMITTING-DIODES; THERMAL-STABILITY; INDUCED EMISSION; 2
- 3
- 4
- 5-TETRAPHENYLSILOLES; PHOTOLUMINESCENCE; POLYMERS; STATES
- Theoretical chemistry
- Teoretisk kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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