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Controllable Multiemission with Ultralong Organic Phosphorescence in Crystal by Isomerization
Author(s) -
Ling Kun,
Shi Huifang,
Wang He,
Fu Lishun,
Lv Anqi,
Huang Kaiwei,
Ye Wenpeng,
Gu Mingxing,
Ma Chaoqun,
Yao Xiaokang,
Jia Wenyong,
Zhi Jiahuan,
Yao Wei,
An Zhongfu,
Ma Huili,
Huang Wei
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201901076
Subject(s) - phosphorescence , phosphor , intersystem crossing , materials science , fluorescence , photochemistry , molecule , isomerization , phosphorescent organic light emitting diode , crystal (programming language) , single crystal , persistent luminescence , oled , nanotechnology , optoelectronics , luminescence , crystallography , catalysis , optics , chemistry , excited state , organic chemistry , atomic physics , singlet state , physics , computer science , layer (electronics) , programming language , thermoluminescence
Organic multiemissive materials with different lifetimes have attractive applications in sensors, bioimaging, data encryption, and so on. However, it is a formidable challenge to achieve multiemission with ultralong organic phosphorescence (UOP) in a single molecule. Here, reported is a series of isomers ( o ‐CzPh, m ‐CzPh, and p ‐CzPh) with multiemissive behavior under ambient conditions. All phosphors emit both fluorescence and UOP in crystal. Beyond that, o ‐CzPh also displays thermally activated delayed fluorescence with a lifetime of 2.56 µs, which can be ascribed to the fast reverse intersystem crossing process from T 2 to S 1 states. Impressively, m ‐CzPh crystal exhibits another phosphoresce emission with a lifetime of 0.24 ms assigned as single molecule phosphorescence, which is rarely reported. This finding enables the development of new organic phosphors with diverse lifetimes within a single molecule for potential applications.