Crystal structure and characterization of a new one-dimensional copper(II) coordination polymer containing a 4-amino-benzoic acid ligand.

A Cu coordination polymer, -poly[[[aqua-copper(II)]-bis-(μ-4-amino-benz-o-ato)-κ :;κ :] monohydrate], {[Cu(ABA)(HO)]·HO} (ABA = -amino-benzoate, CHNO ), was synthesized and characterized. It exhibits a one-dimensional chain structure extended into a three-dimensional supra-molecular assembly through hydrogen bonds and π-π inter-actions. While the twinned crystal shows a metrically ortho-rhom-bic lattice and an apparent space group , the true symmetry is monoclinic (space group 2/), with disordered Cu atoms and mixed roles of water mol-ecules (aqua ligand/crystallization water). The luminescence spectrum of the complex shows an emission at 345 nm, 349 nm for ABAH.