Selective Expression of Chromophores in a Single Molecule: Soft Organic Crystals Exhibiting Full‐Colour Tunability and Dynamic Triplet‐Exciton Behaviours. Issue 9 (23rd January 2020)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 9(2020)
• Page Start: 3739
• Page End: 3745
• Publication Date: 2020-01-23
• Subjects: crystal engineering -- full-colour emission -- luminescence -- soft molecule -- triplet-exciton; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201915556
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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. Abstract : Crystal clear colours : Selective expression of chromophores is achieved in a soft organic molecule. In response to various external stimuli, full‐colour emissions from ten different individual single crystals and dynamic triplet‐exciton behaviours can be realized via the competition between different chromophores for emission.