Enhanced Binding Affinity, Remarkable Selectivity, and High Capacity of CO2 by Dual Functionalization of a rht-Type Metal-Organic Framework

Open and friendly: The smallest member of the rht‐type metal–organic frameworks (MOFs, see picture) constructed by a hexacarboxylate ligand with a nitrogen‐rich imino triazine backbone shows a significantly enhanced gas binding affinity relative to all other isoreticular rht‐type MOFs. The high adsorption capacity and remarkable selectivity of CO2 are attributed to the high density of open metal and Lewis basic sites in the framework.