Donor-acceptor type [4+3] covalent organic frameworks:sub-stoichiometric synthesis and photocatalytic application

• 作者: Can Ke Jin Xie Kai Xi Qi Zhang Qiaobo Liao Wentao Xu Xin Huang
• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2020,（5）
• 页码范围: 707-714
• 页数: 8页
• 语种: 英文

摘要

Three unprecedented 2D[4+3]covalent organic frameworks (TTCOF-1,TTCOF-2,and TTCOF-3) have been prepared by substoichiometric condensation of tetratopic and tritopic monomers,overcoming the limitations of the design rules of conventional topologies.By reticulating the tetraphenylethylene (TPE)-based and triazine-based moieties into COF frameworks,novel electron donor-acceptor (D-A) type structures were obtained.These TTCOFs have good photocatalytic activity in aerobic C(sp3)-H bond functionalization and arylboronic acid oxidation driven by visible light,with yields up to 94％.This can expedite possibilities of COFs with new structural and topological complexities and can also expand the application of COF-based photocatalysis in synthetic chemistry.