摘要
Three unprecedented 2 D[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.
基金
supported by the Ministry of Science and Technology of China(2017YFA0700503)
the Fundamental Research Funds for the Central Universities(020514380149)
1000-Youth Talent Plan,Nanjing University Graduate Interdisciplinary Research and Innovation Project(2018CL05)。