期刊
ACS MACRO LETTERS
卷 7, 期 7, 页码 852-857出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.8b00435
关键词
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资金
- NIH [1U01DE023777-01]
- Industry/University Cooperative Research Center for Fundamentals and Applications of Photopolymerizations
In this contribution, three o-nitrobenzyl-based photobase systems were synthesized and evaluated for visible light initiated thiol-Michael addition polymerizations. With a modified structure, the (3,4-methylenedioxy-6-nitrophenyl)-propyloxycarbonyl (MNPPOC) protected base performance exceeds that of the nonsubstituted 2-(2-nitropheny1)-propyloxycarbonyl (NPPOC) protected base and an ITX sensitized photobase system, with respect to both long-wavelength light sensitivity and photolytic efficiency. In material synthesis, MNPPOC-TMG is capable of initiating photo thiol-Michael polymerization efficiently and orthogonally with only limited visible light exposure and generating a highly homogeneous cross-linked polymer network. This approach enables the thiol-Michael click reaction to be conducted with a low-energy, visible light irradiation and, thus, expands its applications in biocompatible and UV sensitive materials.
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