A porous the-type metal-organic framework based on [Mn4Cl]7Â + clusters for selective gas sorption

An anionic cage-type metal-organic framework was successfully prepared by using the 4,4′,4″-benzene-1,3,5-triyl-tri-benzoic acid (H3BTB) ligand under solvothermal conditions, whose framework is constructed by cross-linking BTB ligands with in situ-generated square-planar [Mn4Cl]7 + secondary building unit. The free space of this MOF is formed by packing of octahedral and cuboctahedral cages, and the overall framework exhibits a 2-fold interpenetrated the-type topology. N2 adsorption isotherms at 77 K confirmed its permanent porosity and variable temperature adsorption measurements of CO2 and CH4 revealed its potential application in the CO2/CH4 separation progress.391