4.7 Article

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

Journal

CHINESE CHEMICAL LETTERS
Volume 31, Issue 1, Pages 299-302

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2019.03.053

Keywords

Diphenyl cyclopropenone; CO-release; Chain dissociation; Ultrasound; UV light

Funding

  1. National Science Foundation of China [21604071]

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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 D2O exchanging H-1 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 site-specific CO-releasing and chain dissociation. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.

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