Synergistically Converting Carbon Dioxide into Cyclic Carbonates by Metalloporphyrin‐Based Cationic Polymers with Imidazolium Functionality
Xiangying Liu, Farong Zhou, Min Chen, Wei Xu, Hongbo Liu, Jianjiao Zhong, Rongchang Luo
Abstract
Abstract Considering to the synergistic activation behavior in the cycloaddition reaction of CO 2 to epoxides, the integration of metalloporphyrins and nucleophilic halide anions to afford functional organic polymers is one of the most important approaches and still remains challenging. Herein, a class of novel porphyrin‐based cationic polymer (Por‐CP) has been successfully prepared through a one‐pot and atom‐efficient polycondensation of pyrrole and tailorable imidazolium‐based ionic liquid bearing trialdehyde groups in refluxed propanoic acid. Subsequently, a direct metalation of Por‐CP with zinc acetate resulted in the formation of a zinc porphyrin‐based cationic polymer (ZnPor‐CP). The rigid and charged ZnPor‐CP having spatially‐separated active Zn‐porphyrin sites and abundant imidazolium functionalities in the covalently‐linked skeletons can cooperatively promote the reaction under mild conditions, thereby achieving an efficient unification of high activity and good recyclability.