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 |
| 推荐引用方式 GB/T 7714 | 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. |
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来源：化学研究所
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