期刊
DYES AND PIGMENTS
卷 110, 期 -, 页码 113-122出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2014.04.036
关键词
Luminescence; Aggregation induced emission; Phosphorescence; Photochemistry; X-ray structures; Crystallization induced phosphorescence
资金
- European Research Council ERC-StG (PhotoSi) [278912]
- MIUR in Italy [FIRB RBFR10DAK6]
- Vinci program of the French-Italian University
- European Research Council (ERC) [278912] Funding Source: European Research Council (ERC)
A series of functionalized persulfurated benzene molecules were synthesized. Their photophysical properties and crystal structures were analyzed. All compounds are non-emitting in solution at room temperature, but in a sharp contrast, quantum yields can be very high (up to 100%) in the solid state at 298 K or in a rigid matrix at low temperatures. This is a consequence of a decrease of intramolecular rotations and motions, but conformational and rotamer issues along with substituent effects might also play a role. These compounds are among the rare examples of highly phosphorescent organic materials, due to a Crystallization Induced Phosphorescence or to an Aggregation Induced Phosphorescence. Compound 1 is among the most phosphorescent solid known to date. They thus represent an alternative to heavy metal ion-based triplet emitters in solid state. (C) 2014 Elsevier Ltd. All rights reserved.
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