Robust multivariate metal–porphyrin frameworks for efficient ambient fixation of CO2 to cyclic carbonates

Abstract

A family of multivariate metal–organic frameworks (MOFs) with three-kinds of orderly distributed metals were designed and successfully synthesized by combining metalloporphyrin sheets and pentafluoride (NbOF₅)²⁻ pillars. Benefiting from the cooperative nature of open-metal-sites (OMSs) within porphyrins, specific pore-sizes, coupled with fluorine-rich electrostatic environments, the fabricated materials demonstrated high affinity toward CO₂, and good catalytic performance, structural robustness, and good recyclability for the conversion of epoxides and CO₂ to cyclic carbonates at room temperature and 1 atm pressure.