Synthesis, structure and gas adsorption properties of a microporous metal-organic framework assembled from a semi-rigid tripodal carboxylic acid ligand

We designed, synthesized, and characterized a new Cu(II)-based metal-organic framework material, [Cu3(cpbda)2(H2O)3](DEF)4, by using a semi-rigid tripodal carboxylic acid ligand and binuclear Cu(II) units. This MOF features a novel (3,4,4)-connected network with the point symbol {83}4{84·102}2{86} which has not been observed in MOF chemistry. The co-existing of the circular channels (15 Å) and quadrate channels (4.5 Å) contributes to its high pore and Brunauer-Emmett-Teller (BET) surface area. In addition, the activated MOF also shows excellent CO2 storage capacity around room temperature.226