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Rational Control of Charge Transfer Excitons Toward High‐Contrast Reversible Mechanoresponsive Luminescent Switching
Author(s) -
Wang Zongrui,
Yu Fei,
Chen Wangqiao,
Wang Jianfeng,
Liu Jinyu,
Yao Changjiang,
Zhao Jianfeng,
Dong Huanli,
Hu Wenping,
Zhang Qichun
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202005933
Subject(s) - stacking , cocrystal , coronene , materials science , luminescence , intermolecular force , excited state , exciton , chemical physics , diimide , photochemistry , molecule , solvent , lattice (music) , optoelectronics , chemistry , hydrogen bond , atomic physics , organic chemistry , perylene , condensed matter physics , physics , acoustics
A practicable strategy to rationally obtain the reversible mechanochromic luminescent (MCL) material with high‐contrast ratio (green versus red) has been established. By introducing a volatile third party (small‐sized solvent molecules) into the lattice of charge transfer (CT) cocrystal of mixed‐stacking 1:1 coronene (Cor.) and napthalenetetracarboxylic diimide (NDI), a noteworthy reconfigurable molecular assembly is ingeniously achieved owing to the loosely packing arrangement as well as weakened intermolecular interactions. Accordingly, the CT excited state, strongly corresponding to the molecular stacking modes, can be intentionally tailored through external stimulus (heating, grinding, or solvent), accompanying distinct changes in photophysical properties. Subsequently, a high‐contrast reversible MCL with highly sensitive and good reproducibility is realized and the underlying mechanism is thoroughly revealed.