An infinite sandwich-type copper (I) coordination polymer containing 2-d double chains layers structure intercalated with the terephthalic acid layers

A high-quality single crystal structure of a new coordination polymer having the formula [Cu-2(mu-SO4)(mu-bpy)(2) center dot(H(2)ta)] (n) (1) (H(2)ta = terephthalic acid; bpy = 4,4'-bipyridine) was obtained when the in situ reaction of CuSO4 center dot 5H(2)O with H(2)ta and bpy ligands under solvothermal conditions (H2O/ethanol) were carried out. The results of the structural characterization show that Cu(I) ions are bridged by 4,4'-bipyridine to form infinite 1-D chains, which are further linked through the sulfate groups to form a 1-D double chain structure. The extensive hydrogen-bonding interactions between the sulfate anions and free terephthalic acid molecules have an important effect in generating the 2-D layer structures and finally an infinite 3-D sandwich-type coordination polymer. In addition, the luminescent properties of coordination polymer 1 are also discussed.