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A Photoexcitation‐Induced Twisted Intramolecular Charge Shuttle
Author(s) -
Chi Weijie,
Qiao Qinglong,
Lee Richmond,
Liu Wenjuan,
Teo Yock Siong,
Gu Danning,
Lang Matthew John,
Chang YoungTae,
Xu Zhaochao,
Liu Xiaogang
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201902766
Subject(s) - intramolecular force , photoexcitation , charge (physics) , chemistry , photochemistry , biomolecule , acceptor , bodipy , photoinduced charge separation , excited state , chemical physics , nanotechnology , fluorescence , materials science , stereochemistry , organic chemistry , atomic physics , biochemistry , physics , quantum mechanics , condensed matter physics , photocatalysis , artificial photosynthesis , catalysis
Charge transfer and separation are important processes governing numerous chemical reactions. Fundamental understanding of these processes and the underlying mechanisms is critical for photochemistry. Herein, we report the discovery of a new charge‐transfer and separation process, namely the twisted intramolecular charge shuttle (TICS). In TICS systems, the donor and acceptor moieties dynamically switch roles in the excited state because of an approximately 90° intramolecular rotation. TICS systems thus exhibit charge shuttling. TICSs exist in several chemical families of fluorophores (such as coumarin, BODIPY, and oxygen/carbon/silicon–rhodamine), and could be utilized to construct functional fluorescent probes (i.e., viscosity‐ or biomolecule‐sensing probes). The discovery of the TICS process expands the current perspectives of charge‐transfer processes and will inspire future applications.