Ultralong excimer phosphorescence by the self-assembly and confinement of terpyridine derivatives in polymeric matrices  

作　　者：Guangqiang Yin Wei Lu Jianxiang Huang Rui Li Depeng Liu Longqiang Li Ruhong Zhou Guifei Huo Tao Chen 

机构地区：[1]Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,China [2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing,China [3]Institute of Quantitative Biology,College of Life Sciences,Zhejiang University,Hangzhou,China [4]Department of Chemistry,National University of Singapore,Singapore,Singapore

出　　处：《Aggregate》2023年第4期230-238,共9页聚集体（英文）

基　　金：National Key Research and Development Program of China,Grant/Award Numbers:2022YFB3204301,2021YFA1201201;National Natural Science Foundation of China,Grant/Award Numbers:22205249,U1967217;China Postdoctoral Science Foundation,Grant/Award Numbers:2021TQ0341,2022M723252;Zhejiang Provincial Natural Science Foundation of China,Grant/Award Number:LQ23B040002;Natural Science Foundation of Ningbo,Grant/Award Number:2021J203;Foundation of the Director of NIMTE,Grant/Award Number:2021SZKY0305。

摘　　要：Ultralong organic room temperature phosphorescence(RTP)is attracting increas-ing attention due to its fascinating optical phenomena and wide applications.Among various RTP,excimer phosphorescence is of fundamental significance,but it remains a considerable challenge to achieveflexible,multicolor and large-area excimer RTP materials,which should greatly advance the understanding and devel-opment of organic light-emitting devices.Herein,we present ultralong excimer RTPfilms by the self-assembly and confinement of terpyridine(Tpy)derivatives in polymeric matrices.Strikingly,the self-assembly of Tpy derivatives induces the formation of excimer complexes,thus immensely minimizing singlet-triplet split-ting energy(ΔEST)to promote the intersystem crossing process.Furthermore,the confinement by multiple hydrogen bonding interactions as well as the compact aggregation of phosphors jointly suppresses the nonradiative transitions,leading to long-lived excimer RTP(τ543.9 ms,19,000-fold improvements over the pow-=der).On account of the outstanding afterglow performance and color-tunability of RTP materials,flexible and large-areafilms were fabricated for intelligent display,anticounterfeiting,and time-resolved information encryption.

关 键 词：aggregation EXCIMER information encryption room temperature phosphorescence TERPYRIDINE 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]