No abstract

The chemical conversion of CO 2 into value-added chemicals is one promising approach for CO 2 utilization. It is crucial to explore highly efficient catalysts containing task-specific components for CO 2 fixation. Here, a host-guest catalytic system was developed by integrating nitrogen-rich covalent organic framework (TT-COF) and imidazolium-based ionic polymer (ImIP), which serve as hydrogen-bonding donor and nucleophilic agent, respectively, for cooperatively facilitating the activation of the epoxides and subsequent CO 2 cycloaddition. The catalytic activity of the host-guest system was remarkably superior to those of ImIP, TT-COF, and their physical mixture. Furthermore, selective adsorption for CO 2 over N 2 rendered this catalytic system effective for the cycloaddition reaction of the simulated flue gas. The protocols for the unification of two catalytically active components provide new opportunities for the development of composite systems in multiple applications.

Invited for this month's cover are the groups of Rongjian Sa and Ruihu Wang at Minjiang University and the Chinese Academy of Sciences. The image shows how host–guest composite catalysts with task‐specific components for the cycloaddition of CO2 with epoxides have been developed through integrating nitrogen‐rich covalent organic framework and imidazolium‐based ionic polymer. The Full Paper itself is available at 10.1002/cssc.202006158.