文献类型：期刊文献

英文题名：Fully-π conjugated covalent organic frameworks as catalyst for photo-induced atom transfer radical polymerization with ppm-level copper concentration under LED irradiation

作者：Lu, Zhen[1];Yang, Hongjie[1];Fu, Xiaoling[1];Zhao, Rukai[4];Zhao, Yulai[1,2];Cai, Jingyu[1,2];Xiao, Longqiang[1,2];Hou, Linxi[1,2,3]

机构：[1]Fuzhou Univ, Sch Chem Engn, Dept Mat Oriented Chem Engn, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;[2]Qingyuan Innovat Lab, Quanzhou 362801, Peoples R China;[3]Fuzhou Univ, Fujian Key Lab Adv Mfg Technol Specialty Chem, 2 Xueyuan Rd, Fuzhou 350116, Peoples R China;[4]East China Univ Sci & Technol, Dept Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：157

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：20213110721638);WOS:【SCI-EXPANDED(收录号:WOS:000693340300009)】；

基金：This work was Financially supported by National Natural Science Foundation of China (Grant No. 21676057), Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology (ACEMT-17-02), '111' program of Fuzhou University, Talent program of Fuzhou University (GXRC-18041), Natural Science Foundation of Fujian Province (Grant No. 2019J05040), Key Program of Qingyuan Innovation Laboratory (Grant No. 00221003) and Fuzhou University Testing Fund of precious apparatus(2021T022).

语种：英文

外文关键词：Photo-induced ATRP; ppm-level Cu-II; Covalent organic frameworks; Heterogeneous photocatalyst

摘要：Photo-induced atom transfer radical polymerization (ATRP) becomes a significant method for preparing well-defined polymers with pre-designable molecular weight and narrow molecular weight dispersity (M-w/M-n). Herein, a fully-pi covalent organic framework (COF) was constructed and served as heterogeneous photocatalyst for photo-induced ATRP under LED irradiation. TCPB-DMTA-COF, which was constructed by Knoevenagel polycondensation of 1,3,5-tris(4-cynomethylphenyl)benzene (TCPB) and 2, 5-Dimethoxy-terephthalaldehyde (DMTA) and exhibited remarkable performance in mediating photo-induced ATRP of methyl methacrylates with the assist of ppm-level concentration of Cu-II under LED irradiation, producing polymers with high chain-fidelity and low value of M-w/M-n (1.10-1.35). The switch "on/off" experiment exhibits excellent temporal and spatial control toward polymerization system. Compared with TCPB-DMTA-CMP, the high crystallinity and stability of TCPB-DMTA-COF endows high monomer conversion and good recyclability performance for photo-induced ATRP. These results suggest COF can be served as a promising artificial photocatalyst for photo-induced ATRP.