| Abstract
| - The reactions of porous two-dimensional copper dicarboxylates (copper fumarate, copper terephthalate, copperstyrene dicarboxylate, and copper 4,4‘-biphenyl dicarboxylate) with triethylenediamine as a pillar ligand yieldedporous three-dimensional coordination polymers. The characterization by gas adsorption indicated that thesecoordination polymers have uniform micropores, high porosities, and gas adsorption capacities. These propertiesdepend on the kind of dicarboxylate, and by changing it, the porosity and the pore size of the polymer canbe controlled. The measurements of methane adsorption isotherms revealed that all coordination polymershave methane adsorption capacities, and especially, polymers synthesized from copper styrene dicarboxylateand copper 4,4‘-biphenyl dicarboxylate, which have ideal pore sizes and distributions for methane adsorption,have higher methane adsorption capacities than that of the theoretical maximum for activated carbon.
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