首页|Responsive organic room-temperature phosphorescence materials for spatial-time-resolved anti-counterfeiting
Responsive organic room-temperature phosphorescence materials for spatial-time-resolved anti-counterfeiting
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Stimulus-responsive room-temperature phosphorescence(RTP)materials have gained significant atten-tion for their important optoelectronic application prospects.However,the fabrication strategy and un-derlying 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 derivatives-based 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-of-concept for largely enhancing the security level.This study not only provides new prospects for develop-ing smart RTP materials but also promotes the advancement of optical anti-counterfeiting applications.
Key Laboratory of Advanced Marine Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
College of Material Chemistry and Chemical Engineering,Key Laboratory of Organosilicon Chemistry and Material Technology,Ministry of Education,Hangzhou Normal University,Hangzhou 311121,China
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