Compared with fluorescent materials,metal-free organic environmental afterglow materials,with larger Stokes shifts,longer lifetimes,higher S/N ratios,and sensitivities,present potential in new applications.However,ach...Compared with fluorescent materials,metal-free organic environmental afterglow materials,with larger Stokes shifts,longer lifetimes,higher S/N ratios,and sensitivities,present potential in new applications.However,achieving air stability and long lifetime organic afterglow systems with tunable emission color still remains a challenge.Herein,we have designed and synthesized luminescent copolymers exhibiting afterglow emission with tunability including white-light afterglow with considerable quantum yield[Commission Internationale de l’Eclairage(CIE)coordinates(0.32,0.33),ΦP=11%]in the amorphous state through the rarely reported triplet-to-singlet Förster resonance energy transfer(TS-FET).Also,they can emit different colors under UV light,including white-light[CIE coordinates(0.31,0.33),ΦPl=27%].This strategy was achieved by copolymerizing two simple-structured single-benzene-based compounds with acrylamide(AM)in different ratios.In addition,these materials can also be employed as a safety ink for paper paving the way for long lifetime luminescent material applications.展开更多
基金The National Natural Science Foundation of China(nos.21788102,22020102006,21722603,and 21871083)project support by the Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03)+3 种基金Program of Shanghai Academic/Technology Research Leader(no.20XD1421300)“Shu Guang”project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation(no.19SG26)the Innovation Program of Shanghai Municipal Education Commission(no.201701-07-00-02-E00010)the Fundamental Research Funds for the Central Universities.
文摘Compared with fluorescent materials,metal-free organic environmental afterglow materials,with larger Stokes shifts,longer lifetimes,higher S/N ratios,and sensitivities,present potential in new applications.However,achieving air stability and long lifetime organic afterglow systems with tunable emission color still remains a challenge.Herein,we have designed and synthesized luminescent copolymers exhibiting afterglow emission with tunability including white-light afterglow with considerable quantum yield[Commission Internationale de l’Eclairage(CIE)coordinates(0.32,0.33),ΦP=11%]in the amorphous state through the rarely reported triplet-to-singlet Förster resonance energy transfer(TS-FET).Also,they can emit different colors under UV light,including white-light[CIE coordinates(0.31,0.33),ΦPl=27%].This strategy was achieved by copolymerizing two simple-structured single-benzene-based compounds with acrylamide(AM)in different ratios.In addition,these materials can also be employed as a safety ink for paper paving the way for long lifetime luminescent material applications.
