Endowing metal halide hybrids(MHHs)with time-resolved emission and afterglow could significantly broaden their applications in fields such as information security and anti-counterfeiting.Nonetheless,there have been re...Endowing metal halide hybrids(MHHs)with time-resolved emission and afterglow could significantly broaden their applications in fields such as information security and anti-counterfeiting.Nonetheless,there have been relatively few successes in developing organic cations with persistent room-temperature phosphorescence(RTP)to construct MHHs with afterglow.In this work,we synthesize a new polyazole,3,5-di(1H-pyrazol-4-yl)-4H-1,2,4-triazol-4-amine(DPTA),with green persistent RTP up to 1.5 s.The afterglow of DPTA reaches up to∼1.0 s even after being assembled into 0D(DPTAH_(3))InCl_(6)·2.5H_(2)O(DIC).Due to strong overlap between the triplet emission of DPTA and ^(1)S0→^(3)Px absorption of Sb^(3+),efficient triplet energy transfer(TET)with the highest yield of 65.3%and a near-unity photoluminescence quantum yield(PLQY)is achieved.More importantly,the afterglow persistence time of DIC:x%Sb can be easily tailored through Sb^(3+)doping.Given the Sb^(3+)-dependent emission color and long persistence time,a series of DIC:x%Sb are successfully utilized to demonstrate high-security-level anti-counterfeiting application.This work shows an effective strategy for designing new MHHs with tunable emission and afterglow persistence time.展开更多
基金supported by the Guangdong Basic and Applied Basic Research Foundation(2022A1515011997)the Li Ka Shing Foundation Cross-Disciplinary Research Project(2020LKSFG09A)+2 种基金the Open Foundation of Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials(2022GXYSOF14)K.X.is thankful for the financial support from the National Natural Science Foundation of China(52203343)the Shenzhen Science and Technology Program(20210607151625001).
文摘Endowing metal halide hybrids(MHHs)with time-resolved emission and afterglow could significantly broaden their applications in fields such as information security and anti-counterfeiting.Nonetheless,there have been relatively few successes in developing organic cations with persistent room-temperature phosphorescence(RTP)to construct MHHs with afterglow.In this work,we synthesize a new polyazole,3,5-di(1H-pyrazol-4-yl)-4H-1,2,4-triazol-4-amine(DPTA),with green persistent RTP up to 1.5 s.The afterglow of DPTA reaches up to∼1.0 s even after being assembled into 0D(DPTAH_(3))InCl_(6)·2.5H_(2)O(DIC).Due to strong overlap between the triplet emission of DPTA and ^(1)S0→^(3)Px absorption of Sb^(3+),efficient triplet energy transfer(TET)with the highest yield of 65.3%and a near-unity photoluminescence quantum yield(PLQY)is achieved.More importantly,the afterglow persistence time of DIC:x%Sb can be easily tailored through Sb^(3+)doping.Given the Sb^(3+)-dependent emission color and long persistence time,a series of DIC:x%Sb are successfully utilized to demonstrate high-security-level anti-counterfeiting application.This work shows an effective strategy for designing new MHHs with tunable emission and afterglow persistence time.
