Reversible switching between normal and thermally activated delayed fluorescence towards “smart” and single compound white-light luminescence via controllable conformational distribution

An organic compound exhibiting simultaneously reversible switch between its emission colors and luminescence mechanisms, possessing high contrast from deep blue normal fluorescence (NF) to yellow thermally activated delayed fluorescence (TADF), is reported. Based on these two complementary colors, w...

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Bibliographic Details
Published inScience China. Chemistry Vol. 61; no. 6; pp. 677 - 686
Main Authors He, Zuozheng, Cai, Xinyi, Wang, Zhiheng, Chen, Dongjun, Li, Yunchuan, Zhao, Haobin, Liu, Kunkun, Cao, Yong, Su, Shi-Jian
Format Journal Article
LanguageEnglish
Published Beijing Science China Press 01.06.2018
Springer Nature B.V
Subjects
Behavior
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Controllability
Density functional theory
Fluorescence
Light
Light emission
Luminescence
Nanoparticles
Organic compounds
Photonics
Switching
Temperature
White light
“smart” luminescent material
reversible switching luminescence
conformational relaxation
white-light emission
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Summary:An organic compound exhibiting simultaneously reversible switch between its emission colors and luminescence mechanisms, possessing high contrast from deep blue normal fluorescence (NF) to yellow thermally activated delayed fluorescence (TADF), is reported. Based on these two complementary colors, white-light emission combining NF and TADF from a single compound can be achieved in various states. Experimental results and density functional theory calculations indicate that the controllable conformational distribution under thermal and mechanical activation is the mechanism responsible for the reversible switching behavior.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-017-9219-x