Responsive organic room-temperature phosphorescence materials for spatial-time-resolved anti-counterfeiting  

作　　者：Jiayin Zhou Depeng Liu Longqiang Li Min Qi Guangqiang Yin Tao Chen 

机构地区：[1]Key Laboratory of Advanced Marine Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Material Chemistry and Chemical Engineering,Key Laboratory of Organosilicon Chemistry and Material Technology,Ministry of Education,Hangzhou Normal University,Hangzhou 311121,China

出　　处：《Chinese Chemical Letters》2024年第11期475-480,共6页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.22205249);Zhejiang Provincial Natural Science Foundation of China(No.LQ23B040002);the Sino-German Mobility Program(No.M-0424);Ningbo International Cooperation Project(No.2023H019);China Postdoctoral Science Foundation(Nos.2021TQ0341,2022M723252)。

摘　　要：Stimulus-responsive room-temperature phosphorescence(RTP)materials have gained significant attention for their important optoelectronic application prospects.However,the fabrication strategy and underlying mechanism of stimulus-responsive RTP materials remain less explored.Herein,we present a reliable strategy for achieving pH-responsive RTP materials by integrating poly(vinyl alcohol)(PVA)with carboxylic acid or amino group functionalized terpyridine(Tpy)derivatives.The resulting Tpy derivativesbased RTP materials displayed reversible changes in emission color,intensity,and lifetime of both prompt and delayed emission.Notably,the RTP emission undergoes a significant diminish upon exposure to acid due to the protonation of Tpy units.Taking advantage of the decent RTP emission and pH-responsiveness of these RTP films,a spatial-time-resolved anti-counterfeiting application is demonstrated as a proof-ofconcept for largely enhancing the security level.This study not only provides new prospects for developing smart RTP materials but also promotes the advancement of optical anti-counterfeiting applications.

关 键 词：Room-temperature phosphorescence PH-RESPONSIVE Hydrogen bonding interactions Spatial-time-resolved anti-counterfeiting TERPYRIDINE 

分 类 号：TB34[一般工业技术—材料科学与工程]