Selective gas adsorption within a five-connected porous metal–organic framework

A microporous metal–organic framework, Zn3(OH)(L)2.5(DMF)41 (L = 2,5-dichloro-1,4-benzenedicarboxylate and DMF = N,N′-dimethylformamide) of a rare five-connected (44)(66) topology was synthesized and structurally characterized. The de-solvated phase is thermally stable up to 350 °C, thus activation of this new MOF material at different temperatures of 150 and 300 °C under high vacuum formed two microporous materials 1a and 1b, respectively, exhibiting selective gas adsorption behavior with respect to H2/N2 and O2/N2, and CO2/CH4 and CO2/N2.