Diphenyl cyclopropenone-centered polymers for site-specific CO-releasing and chain dissociation  

作　　者：Chenchen Shao Hanyi Duan Yuqin Min Xinghong Zhang 

机构地区：[1]MOE Key Laboratory of Macromolecular Synthesis and Functionalization.Department of Polymer Science and Engineering,Zhejiang University

出　　处：《Chinese Chemical Letters》2020年第1期299-302,共4页中国化学快报（英文版）

基　　金：financial support by the National Science Foundation of China (No.21604071)

摘　　要：The synthesis and stimuli-responsiveness of a diphenyl cyclopropenone(DPCP)-centered poly(methyl acrylate)(PMA)are presented.DPCP-centered PMA could release carbon monoxide(CO)upon UV light in a switched on-and-off manner.The CO-releasing process can be reported by the variations in photoluminescence spectra.In addition,DPCP moiety covalently embedded in the crosslinked polyurethane could also release CO under UV light.Of special,DPCP-centered PMA in solution was selectively dissociated at the phenol ester bond under the ultrasound,and a force-induced hydrolyzation reaction was revealed by D20 exchanging^1 H NMR spectra.The kinetic study reveals that small quantity of water could enhance the chain scission rate.This work provides a DPCP-centered polymer for sitespecific CO-releasing and chain dissociation.The synthesis and stimuli-responsiveness of a diphenyl cyclopropenone(DPCP)-centered poly(methyl acrylate)(PMA) are presented.DPCP-centered PMA could release carbon monoxide(CO) upon UV light in a switched on-and-off manner.The CO-releasing process can be reported by the variations in photoluminescence spectra.In addition,DPCP moiety covalently embedded in the crosslinked polyurethane could also release CO under UV light.Of special,DPCP-centered PMA in solution was selectively dissociated at the phenol ester bond under the ultrasound,and a force-induced hydrolyzation reaction was revealed by D20 exchanging ~1 H NMR spectra.The kinetic study reveals that small quantity of water could enhance the chain scission rate.This work provides a DPCP-centered polymer for sitespecific CO-releasing and chain dissociation.

关 键 词：Diphenyl cyclopropenone CO-release Chain dissociation Ultrasound UV light 

分 类 号：O633.14[理学—高分子化学]