Color-Shifting Fluorescent System Based on an AIE Polymer with an Upper Critical Solution Temperature
writer：Yu, Shunfeng
keywords：THERMORESPONSIVE BEHAVIORWATERTHERMOMETERTRANSITIONCOPOLYMER
source：期刊
Issue time：2023年
The design of thermoresponsive luminescent polymers with both atunable upper critical solution temperature (UCST) and a tunable coloris of great challenge. Herein, a series of thermoresponsive copolymerswith UCST and aggregation-induced emission (AIE) behaviors are prepared,and a color-shifting fluorescent system based on the energy conversionbetween the AIE polymers and fluorescent dyes is constructed. Thecopolymers are prepared from acrylamide and 6-(4-vinylphenyl)-2,4-diamino-1,3,5-triazine(VPhDT). Benefitting from VPhDT, an AIE-active monomer that can providemultiple hydrogen bonds and enhance association of the polymer chains,the obtained copolymers exhibit both UCST and AIE behaviors in aqueoussolutions. Utilizing the AIE copolymers as the donor and fluorescentdyes as the acceptors, color-shifting fluorescent systems that canemit blue, green, and red lights are established. The color-shiftingfluorescent systems also exhibit tunable luminescent intensities andcolors with the stimuli of temperature and pH. Such a color-shiftingfluorescent system may have promising applications in the fields oftemperature sensors and information displays.