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Crystal Multi‐Conformational Control Through Deformable Carbon‐Sulfur Bond for Singlet‐Triplet Emissive Tuning
Author(s) -
Wu Hongwei,
Chi Weijie,
Baryshnikov Gleb,
Wu Bin,
Gong Yifan,
Zheng Dongxiao,
Li Xin,
Zhao Yanli,
Liu Xiaogang,
Ågren Hans,
Zhu Liangliang
Publication year - 2019
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.201900703
Subject(s) - singlet state , stacking , crystal (programming language) , phosphorescence , photochemistry , luminescence , triplet state , covalent bond , singlet fission , excited state , crystal structure , chemistry , materials science , fluorescence , crystallography , molecule , optoelectronics , organic chemistry , optics , atomic physics , physics , computer science , programming language
Crystal‐state luminophores have been of great interest in optoelectronics for years, whereas the excited state regulation at the crystal level is still restricted by the lack of control ways. We report that the singlet‐triplet emissive property can be profoundly regulated by crystal conformational distortions. Employing fluoro‐substituted tetrakis(arylthio)benzene luminophores as prototype, we found that couples of molecular conformations formed during different crystallizations. The deformable carbon‐sulphur bond essentially drove the distortion of the molecular conformation and varied the stacking mode, together with diverse non‐covalent interactions, leading to the proportional adjustment of the fluorescence and phosphorescence bands. This intrinsic strategy was further applied for solid‐state multicolor emissive conversion and mechanoluminescence, probably offering new insights for design of smart crystal luminescent materials.