Non-aromatic annulene-based aggregation-induced emission system via aromaticity reversal process.

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2019
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Abstract
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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zhao2019nonaromaticnature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zheng Zhao, Xiaoyan Zheng, Lili Du, Yu Xiong, Wei He, Xiuxiu Gao, Chunli Li, Yingjie Liu, Bin Xu, Jing Zhang, Fengyan Song, Ying Yu, Xueqian Zhao, Yuanjing Cai, Xuewen He, Ryan T K Kwok, Jacky W Y Lam, Xuhui Huang, David Lee Phillips, Hua Wang, Ben Zhong Tang
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Journal Nature communications
Year 2019
DOI
10.1038/s41467-019-10818-5
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