Different dimensional coordination polymers with 4-,4′-oxybis(benzoate): Syntheses, structures and properties

Five transition-metal coordination polymers, namely, [Zn7Cl6(oba)(4)](n) (1), [Cd7Cl6(oba)(4)](n) (2), [Zn(oba) (H2O)(n) (3), [Ag-2(oba)](n) (4) and [Co(oba)(H2O)(2)](n) (5) (H(2)oba=4,4'-oxydibenzoic acid), have been achieved under hydrothermal conditions and structurally characterized by IR, elemental analyses, X-ray single-crystal diffraction and TGA. The X-ray single-crystal diffraction reveals that compounds 1 and 2 are isomorphism, featuring pillared-layer 3D motifs, in which the 2D inorganic layers (Zn6Cl7)(n) (or (Cd6Cl7)(n)) are connected by oba(2-) pillars. Compound 3 exhibits 1D stair-like chain and extends to a 3D network by two different interchain O-H-O hydrogen bonding interactions while compound 4 features wave chains and stretches to 2D layer by interchain Ag-O weak contacts. Compound 5 shows 2D network in which Co-chains are pillared by oba(2-) ligand and then forms a 3D network by four different O-H-O hydrogen bonding interactions. Furthermore, 1-4 exhibit luminescent properties at a solid state and 5 shows antiferromagnetic behavior. (C) 2014 Elsevier Inc. All rights reserved.