A S4N4-like [Co4(μ-Cl)4] based metal–organic framework with sum topology and selective CO2 uptake

A metal–organic framework, [Co4(μ-Cl)4(DPB)4]·6DMF·8H2O (NJU-Bai18; NJU-Bai for Nanjing University Bai's group) (HDPB = 3,5-di(pyridin-4-yl)benzoic acid), with (3,12)-connected sum topology was presented, which is the first MOF based upon the S4N4-like [Co4(μ-Cl)4] cluster and exhibits high CO2 uptake (20.0 wt% at 1 bar) and high selectivity to CO2/N2 (27.5) at 273 K.