Hydrothermal syntheses and characterizations of two eight-connected networks in a mixed ligand system

The hydrothermal reaction of Co/Zn salts with H2bdoa (bdoa = benzene-1,4-dioxydiacetate) and bpp (bpp = 1,3-bis(4-pyridyl)propane) give rise to two eight-connected three-dimensional (3D) coordination polymers namely, [M2(C10H8O6)2(C13H14N2)2H2O]n, (1 M = Co, 2 M = Zn). In 1 and 2, metal ions firstly bind bdoa ligand to construct grid-like 2D layers and bpp ligands further connect neighboring 2D layers to form eight-connected network. All the two complexes have been fully characterized by infrared spectroscopy, elemental analysis and X-ray diffraction. In addition, magnetic properties for 1, photoluminescent properties for 2 are discussed associated with their crystal structure in this paper.