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Zhao, Zheng; Zheng, Xiaoyan; Du, Lili; Xiong, Yu; He, Wei; Gao, Xiuxiu; Li, Chunli; Liu, Yingjie; Xu, Bin; Zhang, Jing; Song, Fengyan; Yu, Ying; Zhao, Xueqian; Cai, Yuanjing; He, Xuewen; Kwok, Ryan T K; Lam, Jacky W Y; Huang, Xuhui; Lee Phillips, David; Wang, Hua; Tang, Ben Zhong
Nature communications, 07/2019, Letnik: 10, Številka: 1Journal Article
Aggregation-induced emission (AIE) is a photophysical phenomenon correlated closely with the excited-state intramolecular motions. Although AIE has attracted increasing attention due to the significant applications in biomedical and optoelectronics, an in-depth understanding of the excited-state intramolecular motion has yet to be fully developed. Here we found the non-aromatic annulene derivative of cyclooctatetrathiophene shows typical AIE phenomenon in spite of its rotor-free structure. The underlying mechanism is investigated through photoluminescence spectra, time-resolved absorption spectra, theoretical calculations, circular dichroism as well as by pressure-dependent fluorescent spectra etc., which indicate that the aromaticity reversal from ground state to the excited state serves as a driving force for inducing the excited-state intramolecular vibration, leading to the AIE phenomenon. Therefore, aromaticity reversal is demonstrated as a reliable strategy to develop vibrational AIE systems. This work also provides a new viewpoint to understand the excited-state intramolecular motion behavior of lumiongens.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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