Five new Cd(II) coordination polymers constructed from 4,4′-(hydroxyphosphoryl)dibenzoic acid and N-donor pyridine ligands

Abstract

Five new cadmium(II) coordination polymers [Cd(HPBO)(2,2′-bipy)]n (C1), (H3PBO = 4,4′-(hydroxyphosphoryl)dibenzoic acid, 2,2′-bipy = 2,2′-bipyridine), [Cd(HPBO)(phen)]n (C2), (phen = 1,10-phenanthroline), [Cd(HPBO)(4,4′-bipy)0.5]n (C3) (4,4′-bipy = 4,4′-bipyridine), [Cd(HPBO)(dpe)0.5]n (C4), (dpe = 1,2-di(pyridin-4-yl)ethene), [Cd2(HPBO)2(dpp)]n (C5), (dpp = 1,3-di(pyridin-4-yl)propane) were synthesized and characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. The thermal stabilities and luminescence properties of compounds C1–C5 were investigated. The N-donor ligands influence the coordination mods of the Cd(II) centers and dimensionality of the structures and H3PBO accept either bridging and chelating modes. C2 exhibits a 3-connected 2D network of a hcb topology with a point symbol of (63). C3 and C4 show the same unprecedented (4, 10)-connected 3D network with a point symbol of (412·511·618·73·8)(46)2. C5 presents a (4, 10)-connected 3D network of a deh1 topology with a point symbol of (3·45)2(34·412·510·614·73·82).