Amide and N-oxide functionalization of T-shaped ligands for isoreticular MOFs with giant enhancements in CO2 separation

Abstract

By stepwise functionalization of a T-shaped ligand with amide and N-oxide groups, we obtained a MOF with drastically strengthened CO₂–framework interactions, induced by a “open donor sites” (ODSs) effect, resulting in a high heat of adsorption and high CO₂/CH₄, CO₂/CO and CO₂/N₂ separation selectivities at room temperature.