文献类型：期刊文献

英文题名：Self-switchable terpolymerization of cyclic anhydrides, epoxides and lactide catalyzed by C2v-symmetric cobaltoporphyrins

作者：Jiang, Xu[1];Zhang, Tao[1];Gou, Faliang[1]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China

年份：2024

卷号：555

外文期刊名：MOLECULAR CATALYSIS

收录：SCI-EXPANDED(收录号：WOS:001173096600001)、、Scopus(收录号：2-s2.0-85183104020)、WOS

基金：We gratefully acknowledge the financial support from the scientific research project of Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process (jxhxpctgytdjs2302) and the teacher professional development project of the Department of Education of Zhejiang Province (FX2023044).

语种：英文

外文关键词：Cobaltoporphyrin; Self -switch; One -pot terpolymerization; Block copolyesters; No initiator

外文摘要：The urgency for biodegradable plastics free from crude oil -based chemicals is currently paramount. These materials should be easily recyclable and capable of undergoing degradation at the end of their useful life. Herein, a series of C2v-symmetric cobaltoporphyrins featuring different substituents were synthesized, and evaluated for their catalytic performance in the self-switchable terpolymerization of epoxides, cyclic anhydrides and lactide in coordination with a co -catalyst bis(triphenylphosphoranylidene) ammonium chloride (PPNCl), under initiatorfree conditions. These cobaltoporphyrin homogeneous catalysts exhibit promising chemical selectivity in the multicomponent copolymerization, resulting in kinetic differentiation between the ring -opening copolymerization of epoxides with cyclic anhydrides and the ring -opening polymerization of lactide. Lactide only participates in polymerization after complete conversion of cyclic anhydrides, leading to sequence -regulated block copolyesters. The substituents on the porphyrin ligand have significant influence on its catalytic activity. Among all catalysts tested, DOMePP-CoCl exhibited the most outstanding reactivity under optimal conditions. Furthermore, by utilizing different cyclic anhydrides and epoxide monomers, the DOMePP-CoCl/PPNCl catalytic system still exhibited excellent reaction activity, allowing for the high -yielding and high -selectivity transformation into corresponding multiblock copolyesters.