Synthesis of a honeycomb-like Cu-based metal-organic framework and its carbon dioxide adsorption behaviour

Herein, we report on a new Cu-based MOF material, Cu-2(dhtp), structurally homologous to the honeycomb-like M-2(dhtp) series. This has been crystallized under solvothermal conditions using copper nitrate and 2,5-dihydroxyterephthalic acid as an organic linker, being the nature of the co-solvent in the synthesis media an important variable over the final physical properties of the material. The presence of isopropanol as a co-solvent leads to the formation of a pure crystalline phase with textural properties comparable to M-2(dhtp) homologues. The interesting results in CO2 adsorption properties of this new material, especially its isosteric heat of adsorption, make it a suitable MOF to be further evaluated under real conditions of industrial CO2 capture.