中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion

文献类型:期刊论文

作者Bu, Fan1; Duan, Ruihong2; Xie, Yujun2; Yi, Yuanping2; Peng, Qian2; Hu, Rongrong1; Qin, Anjun1; Zhao, Zujin1; Tang, Ben Zhong1,3
刊名ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
出版日期2015-11-23
卷号54期号:48页码:14492-14497
关键词aggregation-induced emission coumarins density functional calculations excited-state decay intramolecular twisting
英文摘要Aggregation-induced emission (AIE) is commonly observed for propeller-like luminogens with aromatic rotors and stators. Herein, we report that a coumarin derivative containing a seven-membered aliphatic ring (CD-7) but no rotors showed typical AIE characteristics, whereas its analogue with a five-membered aliphatic ring (CD-5) exhibited an opposite aggregation-caused quenching (ACQ) effect. Experimental and theoretical results revealed that a large aliphatic ring in CD-7 weakens structural rigidity and promotes out-of-plane twisting of the molecular backbone to drastically accelerate nonradiative excited-state decay, thus resulting in poor emission in solution. The restriction of twisting motion in aggregates blocks the nonradiative decay channels and enables CD-7 to fluoresce strongly. The results also show that AIE is a general phenomenon and not peculiar to propeller-like molecules. The AIE and ACQ effects can be switched readily by the modulation of molecular rigidity.
收录类别SCI
语种英语
公开日期2016-05-09
源URL[http://ir.iccas.ac.cn/handle/121111/29747]  
专题化学研究所_有机固体实验室
作者单位1.S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Beijing 100190, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
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Bu, Fan,Duan, Ruihong,Xie, Yujun,et al. Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2015,54(48):14492-14497.
APA Bu, Fan.,Duan, Ruihong.,Xie, Yujun.,Yi, Yuanping.,Peng, Qian.,...&Tang, Ben Zhong.(2015).Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,54(48),14492-14497.
MLA Bu, Fan,et al."Unusual Aggregation-Induced Emission of a Coumarin Derivative as a Result of the Restriction of an Intramolecular Twisting Motion".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 54.48(2015):14492-14497.

入库方式: OAI收割

来源:化学研究所

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