Abstract
The design, synthesis, and structural characterization of a new cubic three-dimensional microporous metal–organic framework featuring a semi-rigid tripodal carboxylic acid ligand, 4,4′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid (H3cpbda), is reported. Single-crystal X-ray diffraction analysis indicates that compound 1 possesses a novel (3,4,4)-connected network with the point symbol of {83}4{84·102}2{86}. In the framework of 1, there co-exist two types of 1D channels with different pore size (15Å and 4.5Å). The pore characteristics and gas sorption properties of this compound were investigated both at cryogenic temperatures and room temperature by experimentally measuring N2 and CO2 sorption isotherms. These studies show that compound 1 is highly porous with a pore volume of 0.98cm3/g and BET surface of 1926cm3/g. In addition, the activated 1 also shows excellent CO2 storage capacity around room temperature.
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