A universal strategy for achieving dual cross-linked networks to obtain ultralong polymeric room temperature phosphorescence  

作　　者：Yifan Niu Yan Guan Chunye Long Chaofan Ren Jiwen Lu Chanjuan Jin Ping Wang Xinghe Fan He-Lou Xie 

机构地区：[1]Key Laboratory of Environment-friendly Chemistry and Application of Ministry of Education,Key Laboratory of Polymeric Materials and Application Technology of Hunan Province and Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province,College of Chemistry,Xiangtan University,Xiangtan 411105,China [2]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,Center for Soft Matter Science and Engineering,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Science China Chemistry》2023年第4期1161-1168,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22175149,21975215);the Natural Science Foundation of Hunan Province(2021JJ30661);the Scientific Research Foundation of Hunan Provincial Education Department(19A486)。

摘　　要：Efficient polymeric room-temperature phosphorescence(PRTP)with excellent processability and flexibility is highly desirable but still faces formidable challenge.Herein,a general strategy is developed for efficient PRTP through photo-polymerization of phosphor monomers and N-isopropylacrylamide(NIPAM)spontaneously without a crosslinker.Remarkably ultralong lifetime of 3.54 s with afterglow duration time of 25 s and decent phosphorescent quantum efficiency of 13%are achieved.This efficient PRTP has been demonstrated to be derived from the synergistic effect of the covalent and hydrogen bonds networks formed through photo-polymerization of NIPAM.The electron paramagnetic resonance(EPR)spectra confirmed that methyl radicals are generated under the irradiation of ultraviolet light and promote the formation of covalent cross-linking networks.This strategy has also been proved to be generalizable to several other phosphor monomers.Interestingly,the polymer films display ultrahigh temperature resistance with long afterglows even at 140℃ and unexampled ultralong lifetime of 2.45 s in aqueous solutions.This work provides a simple and feasible avenue to obtain efficient PRTP.

关 键 词：universal strategy ultralong polymeric room temperature phosphorescence dual cross-linked networks PHOTOPOLYMERIZATION CROSSLINKER 

分 类 号：TQ317[化学工程—高聚物工业]