Abstract
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.
维普
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