LAUSR

Heterogeneous catalysts offer a highly desirable platform for exploring environmental-benign transformation systems, yet, they typically suffer from significant loss of catalytic efficiency compared with their homogeneous counterparts. In this study, we report the facile synthesis of a porphyrinic conjugated porous polymer incorporated with imidazolium bromide moieties (TPP-ImBr-CPP) by taking advantage of Debus-Radziszewski reaction. Owing to the unique donor-acceptor (D-A) structure, this heterogeneous and metal-free photocatalyst exhibited much improved catalytic activity compared with its small molecular analogs in photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization, producing polymers with narrow distribution (Đ = 1.06-1.18) and high degree of chain-end fidelity. Moreover, the heterogeneous catalyst could be easily separated at the end of polymerization by centrifugation and recycled for five independent PET-RAFT polymerizations without obvious decreases in catalytic efficiency. This article is protected by copyright. All rights reserved.