2016年1月
Room-Temperature Phosphorescence of Crystalline 1,4-Bis(aroyl)-2,5-dibromobenzenes
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
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- ,
- 巻
- 号
- 3
- 開始ページ
- 467
- 終了ページ
- 473
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/ejoc.201501382
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
There is a growing interest in metal-free organic luminophores that exhibit phosphorescence at room temperature. We report herein that 1,4-bis(aroyl)-2,5-dibromobenzenes serve as a new class of such luminophores. The bis(aroyl)benzene derivatives were not emissive either in solution or in a doped polymer thin film. In contrast, crystals of bis(aroyl)benzenes showed photoluminescence under ambient conditions, which was subsequently confirmed as phosphorescence with a luminescence lifetime measurement. The emission color ranged from blue to green, depending on the nature of the aroyl groups, and the luminescent quantum yields were 0.05-0.18 at room temperature and 0.38-0.67 at 77 K. In each crystal, several intermolecular interactions such as C=OH, BrBr, C=OBr, FF, SH, and MeOH were observed, which contributed to the restriction of intramolecular motions, thereby diminishing the nonradiative decay process from the triplet excited states.
- リンク情報
- ID情報
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- DOI : 10.1002/ejoc.201501382
- ISSN : 1434-193X
- eISSN : 1099-0690
- Web of Science ID : WOS:000368815700011