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Title: Water-induced blue-green variable nonconventional ultralong room temperature phosphorescence from cross-linked copolymers via click chemistry
Authors: Gao, Liang
Zhang, Yongfeng
Chen, Xiaohong
Zheng, Yan
Zheng, Xian
Wang, Chang
Wang, Zhonghao
Hao, Jinqiu
Tian, Quanchi
Yu, Xingyu
Yang, Chaolong
Li, Youbing
Zhao, Yanli
Keywords: Science::Chemistry
Issue Date: 2021
Source: Gao, L., Zhang, Y., Chen, X., Zheng, Y., Zheng, X., Wang, C., Wang, Z., Hao, J., Tian, Q., Yu, X., Yang, C., Li, Y. & Zhao, Y. (2021). Water-induced blue-green variable nonconventional ultralong room temperature phosphorescence from cross-linked copolymers via click chemistry. Advanced Optical Materials, 9(24), 2101284-.
Project: RT12/19
Journal: Advanced Optical Materials
Abstract: Ultralong room temperature phosphorescence is employed in information encryption, chemical sensing, lighting, and imaging on account of its long lifetime and high signal-to-noise ratio. As the triplet excitons can be easily quenched and interfered by nonradiative transition process, it is difficult to obtain long-lived phosphorescence through conventional methods. Herein, a general design strategy to form cross-linked networks by click chemistry is presented for efficiently promoting the phosphorescence performance. Using the hydrogen bonding interactions formed between C-O···H-N units and covalently cross-linked network by the B-O bond, the rigidity of the entire system is greatly enhanced, so the radiative transition process is well strengthened. Interestingly, under the influence of water molecule, the afterglow colors of the system change from blue (488 nm) to green (510 nm). Because of the presence of cross-linked network, the emission is not directly quenched when the system is intervened by water. Having long phosphorescence lifetime (841.06 ms) and high quantum yield (10.48%), the obtained system is utilized for anti-counterfeiting demonstration. This strategy paves a new way for the design of amorphous ultralong room temperature phosphorescence materials by efficient and user-friendly click chemistry.
ISSN: 2195-1071
DOI: 10.1002/adom.202101284
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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