Microporous metal organic framework-based copolymers with efficient gas adsorption capability and high temporal stability

We report new microporous metal-organic 3D coordinated copolymers that exhibit both highly efficient gas adsorption capability and high temporal stability. The Zn-coordinated copolymers (MBC n ) were prepared by mixing two organic ligands at various molar ratios: the widely used benzenedicarboxylate (BDC) and its analogous C n -acid with non-polar alkoxy side chains of various lengths. All MBC n copolymers bearing alkoxy side chains exhibited identical framework structures to that of MOF-5 prepared with only the BDC ligand. Interestingly, compared to MOF-5, MBC n copolymers exhibited up to three times higher gas adsorption properties and higher temporal structural stability. Therefore, copolymerization with organic ligands bearing alkoxy side chains is a promising strategy for the development of new microporous metal-organic hybrid materials.