Cobalt-Based Metal-Organic Frameworks for Adsorption of CO and C Hydrocarbons: Effect of Auxiliary Ligands with Different Functional Groups.

Recently, metal-organic frameworks (MOFs) have been investigated as potential materials for CO capture and light hydrocarbon storage/separation due to their high porosity, large surface area, and tunable skeleton structures. In this work, the six cobalt-based MOFs - were successfully synthesized under solvothermal conditions by a mixed-ligand strategy. and have the same framework structure with a topology of {4·5}{4·5·6·7·8}, while the structures of the - frameworks are the same with a topology of {4·5}{4·5·6·7·8}. The adsorption properties of these MOFs for CO and C hydrocarbons were then investigated, and the effect of the functional groups was discussed. The results revealed that the introduction of amino and bromo groups could effectively strengthen the adsorption performance.