Ultraviolet irradiation-responsive dynamic ultralong organic phosphorescence in polymeric systems

Room temperature phosphorescence (RTP) has drawn extensive attention in recent years. Efficient stimulus-responsive phosphorescent organic materials are attractive, but are extremely rare because of unclear design principles and intrinsically spin-forbidden intersystem crossing. Herein, we present a...

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Bibliographic Details
Published in:Nature communications 2021-04, Vol.12 (1), p.2297-2297, Article 2297
Main Authors: Zhang, Yongfeng, Gao, Liang, Zheng, Xian, Wang, Zhonghao, Yang, Chaolong, Tang, Hailong, Qu, Lunjun, Li, Youbing, Zhao, Yanli
Format: Article
Language:English
Subjects:
140/131
639/301/923/1028
639/638/298/398
639/638/541/966
Amorphous materials
Encryption
Humanities and Social Sciences
Irradiation
multidisciplinary
Organic materials
Phosphorescence
Phosphors
Polymers
Polyvinyl alcohol
Principles
Room temperature
Science
Science (multidisciplinary)
Screen printing
Ultraviolet radiation
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Summary:Room temperature phosphorescence (RTP) has drawn extensive attention in recent years. Efficient stimulus-responsive phosphorescent organic materials are attractive, but are extremely rare because of unclear design principles and intrinsically spin-forbidden intersystem crossing. Herein, we present a feasible and facile strategy to achieve ultraviolet irradiation-responsive ultralong RTP (IRRTP) of some simple organic phosphors by doping into amorphous poly(vinyl alcohol) matrix. In addition to the observed green and yellow afterglow emission with distinct irradiation-enhanced phosphorescence, the phosphorescence lifetime can be tuned by varying the irradiation period of 254 nm light. Significantly, the dynamic phosphorescence lifetime could be increased 14.3 folds from 58.03 ms to 828.81 ms in one of the obtained hybrid films after irradiation for 45 min under ambient conditions. As such, the application in polychromatic screen printing and multilevel information encryption is demonstrated. The extraordinary IRRTP in the amorphous state endows these systems with a highly promising potential for smart flexible luminescent materials and sensors with dynamically controlled phosphorescence. Efficient stimulus-responsive phosphorescence organic materials are attractive, but are extremely rare because of unclear design principles and intrinsically spin-forbidden intersystem crossing. Here, the authors present a facile strategy to achieve ultraviolet irradiation-responsive ultralong room-temperature phosphorescence in several simple amorphous polymer materials.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-22609-y