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Selective Expression of Chromophores in a Single Molecule: Soft Organic Crystals Exhibiting Full‐Colour Tunability and Dynamic Triplet‐Exciton Behaviours
Author(s) -
Li Wenlang,
Huang Qiuyi,
Mao Zhu,
Zhao Juan,
Wu Huiyan,
Chen Junru,
Yang Zhan,
Li Yang,
Yang Zhiyong,
Zhang Yi,
Aldred Matthew P.,
Chi Zhenguo
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201915556
Subject(s) - chromophore , phosphorescence , mechanoluminescence , luminescence , exciton , fluorescence , materials science , molecule , photochemistry , optoelectronics , nanotechnology , chemistry , optics , organic chemistry , physics , quantum mechanics
Soft luminescent materials are attractive for optoelectronic applications, however, switching dominant chromophores for property enrichment remains a challenge. Herein, we report the first case of a soft organic molecule (DOS) featuring selective expression of chromophores. In response to various external stimuli, different chromophores of DOS can take turns working through conformation changes, exhibiting full‐colour emissions peaking from 469 nm to 583 nm from ten individual single crystals. Dynamic triplet‐exciton behaviours including thermally activated delayed fluorescence (TADF), room‐temperature phosphorescence (RTP), mechanoluminescence (ML), and distinct mechano‐responsive luminescence (MRL) can all be realized. This novel designed DOS molecule provides a multifunctional platform for detection of volatile organic compounds (VOCs), multicolour dynamic displays, sensing, anticounterfeiting, and hopefully many others.