Polylactide Polymers with Aggregation-Induced Emission for Sensing 2,4,6-Trinitrophenol
In this study,two polylactide polymers containing a tetraphenylethylene(TPE)moiety were synthesized through ring-opening polymerization using hydroxy-substituted TPE as the initiator and lactide as the monomer.These polymers exhibit pronounced aggregation-induced emission(AIE)characteristics,showing weak luminescence in solution but intense emission in aggregated or solid states due to restricted intramolecular motion.Owing to the electron-rich nature of these polymers,photo-induced electron transfer occurs when they interact with electron-withdrawing explosives and explosive analogues,such as trinitrophenol(TNP).This process leads to fluorescence quenching,allowing for the detection of these hazardous substances.The AIE behavior of the polymers combined with their capability to undergo photo-induced electron transfer upon encountering electron-deficient molecules makes them promising candidates for sensing applications in the field of explosive detection
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