木筏
聚合
光催化
卟啉
链式转移
材料科学
光化学
单体
可见光谱
水溶液
化学工程
可逆加成-断裂链转移聚合
自由基聚合
化学
催化作用
有机化学
聚合物
复合材料
光电子学
工程类
作者
Hongjie Yang,Zhen Lu,Xiaoling Fu,Qiu‐Yu Li,Longqiang Xiao,Yulai Zhao,Linxi Hou
标识
DOI:10.1016/j.eurpolymj.2022.111306
摘要
Covalent organic frameworks (COFs) are promising heterogeneous photocatalytic platforms based on their structural designability and diversity. Here, porphyrin-based TCPP-TPDA-COF was synthesized and served as photocatalyst for the application of oxygen-tolerant photoelectron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization in the aqueous phase under visible light irradiation. The effects of catalyst loading, electron sacrificial agent dosage, solvent type, light sources and target polymerization degrees (DPs) on the polymerization behavior are discussed, and the intrinsic mechanisms of the oxygen tolerance properties are identified by the control experiments and oxygen monitoring experiments. TCPP-TPDA-COF endows the RAFT protocol with efficient light availability, high light dependence, well controllability and compatibility with different families of monomers. Programmable COFs provide a powerful avenue for further expansion of photocatalyst candidates compatible with PET-RAFT processes under oxygenated atmosphere.
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