Twofold rigidity activates ultralong organic high-temperature phosphorescence

Kaijun Chen, Yongfeng Zhang, Yunxiang Lei (), Wenbo Dai, Miaochang Liu, Zhengxu Cai, Huayue Wu, Xiaobo Huang () and Xiang Ma ()
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Kaijun Chen: Wenzhou University
Yongfeng Zhang: Beijing Institute of Technology
Yunxiang Lei: Wenzhou University
Wenbo Dai: Wenzhou University
Miaochang Liu: Wenzhou University
Zhengxu Cai: Beijing Institute of Technology
Huayue Wu: Wenzhou University
Xiaobo Huang: Wenzhou University
Xiang Ma: East China University of Science and Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract A strategy is pioneered for achieving high-temperature phosphorescence using planar rigid molecules as guests and rigid polymers as host matrix. The planar rigid configuration can resist the thermal vibration of the guest at high temperatures, and the rigidity of the matrix further enhances the high-temperature resistance of the guest. The doped materials exhibit an afterglow of 40 s at 293 K, 20 s at 373 K, 6 s at 413 K, and a 1 s afterglow at 433 K. The experimental results indicate that as the rotational ability of the groups connected to the guests gradually increases, the high-temperature phosphorescence performance of the doped materials gradually decreases. In addition, utilizing the property of doped materials that can emit phosphorescence at high temperatures and in high smoke, the attempt is made to use organic phosphorescence materials to identify rescue workers and trapped personnel in fires.

Date: 2024
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DOI: 10.1038/s41467-024-45678-1

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