Manipulating the Position of Triplet Chromophores To Achieve a Dynamic Photoactivated Ultralong Organic Phosphorescence Effect

Pure organic materials with room-temperature phosphorescence (RTP) have promising applications in bioimaging, information storage, and encryption. However, these materials are still very scarce due to a lack of design guidelines. Herein, a series of commercial/lab-synthesized carbazole-based derivat...

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Veröffentlicht in:Journal of physical chemistry. C 2021-10, Vol.125 (41), p.22848-22855
Hauptverfasser: Wu, Ni, Xiao, Hui, Lou, Yuheng, Han, Mingxi, Guo, Zhiyong, Zhan, Hongbing
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container_end_page 22855
container_issue 41
container_start_page 22848
container_title Journal of physical chemistry. C
container_volume 125
creator Wu, Ni
Xiao, Hui
Lou, Yuheng
Han, Mingxi
Guo, Zhiyong
Zhan, Hongbing
description Pure organic materials with room-temperature phosphorescence (RTP) have promising applications in bioimaging, information storage, and encryption. However, these materials are still very scarce due to a lack of design guidelines. Herein, a series of commercial/lab-synthesized carbazole-based derivatives is prepared by manipulating the positions of the chlorine substituents on the phenyl ring. The results show that 4CDCzB-Cm and 5CDCzB-Cm have ultralong phosphorescence lifetimes of 699.13 and 710.96 ms with good conjugation, longer than lab-synthesized ones due to the existence of isomers in the commercial samples. Remarkably, 2CDCzB-Cm shows photoactivated ultralong RTP with increased lifetimes from 51.24 to 631.83 ms by manipulating intermolecular interactions upon UV irradiation. The phosphor can also be deactivated back to its original state after standing in the dark for 5 h. The extraordinary photoresponsive and highly reversible properties of 2CDCzB-Cm provide a significant step forward in expanding the scope of organic phosphorescence applications.
doi_str_mv 10.1021/acs.jpcc.1c06860
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title Manipulating the Position of Triplet Chromophores To Achieve a Dynamic Photoactivated Ultralong Organic Phosphorescence Effect
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