A two-dimensional copper(II) coordination polymer based on 2,4′-oxybis(benzoate) and 4,4′-bipyridine

The reaction of Cu(NO3)(2)center dot 3H(2)O with 2,4'-oxybis(benzoic acid) and 4,4'-bipyridine under hydrothermal conditions produced a new mixed-ligand two-dimensional copper(II) coordination polymer, namely poly[[(mu-4,4'-bipyridine-kappa(2) N,N')[mu-2,4'-oxybis(benzoato)-kappa O-4(2), O-2': O-4, O-4']copper(II)] monohydrate], {[Cu(C14H8O5)(C10H8N2)]center dot H2O}(n), which was characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. The X-ray diffraction crystal structure analysis reveals that the Cu-II ions are connected to form a two-dimensional wave-like network through 4,4'-bipyridine and 2,4'-oxybis(benzoate) ligands. The two-dimensional layers are expanded into a three-dimensional supramolecular structure through intermolecular OH center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds. Furthermore, magnetic susceptibility measurements indicate that the complex shows weak antiferromagnetic interactions between adjacent Cu-II ions.