A highly robust lutecium(III)-organic framework for the high catalytic performance on the chemical fixation CO2

Abstract

Herein, a highly robust dual-channel material of {[(CH3)2NH2]2[Lu3(BDCP)2(NO3)(OH2)3]·4DMF·2H2O}n (OIM-1) built on the combination of wave-like [Lu2(CO2)6(OH2)2]n chains and [Lu(CO2)4(NO3)(OH2)] units was synthesized from the structure-oriented ligand of 2,6-bis(2,4-dicarboxylphenyl)-4-(4-carboxylphenyl)pyridine (H5BDCP) and lutetium oxide under solvothermal condition. Performance characterizations exhibit that OIM-1 has the excellent physicochemical properties of solvent-free dual channels, bigger specific surface area, high porosity and thermal stability. Because of coexisted Lewis acid-base sites including rich hexa/hepta-coordinated Lu3+ ions, N=O and C=O groups from μ1-η1:η1 NO3− and CO2−, and Npyridine atoms, acitivated OIM-1, as a heterogenous catalyst, displays the high catalytic performance on the cycloaddition reaction of CO2 with epoxides into cyclic carbonates under the mild solvent-free reaction conditions of 1 atm and 60 °C within 6 h.