Facile Approach to Graft Ionic Liquid into MOF for Improving the Efficiency of CO2 Chemical Fixation

This work describes a facile approach to modify metal–organic frameworks (MOFs) with ionic liquids (ILs), rendering them as useful heterogeneous catalysts for CO 2 chemical fixation. An amino-functionalized imidazolium-based ionic liquid is firmly grafted into the porous MOF, MIL-101–SO 3 H by the acid–base attraction between positively charged ammonium groups on the IL and negatively charged sulfonate groups from the MOF. Analyses by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, 1 H NMR, and N 2 sorption experiments reveal the MOF-supported ionic liquid (denoted as [email protected] ) material remains intact while functioning as a recyclable heterogeneous catalyst that can efficiently convert CO 2 and epichlorohydrin into chloropropene carbonate without the addition of a cocatalyst.