A Cd(II) coordination polymer with 5-ethoxy-isophthalate linker: synthesis, crystal structure, and fluorescent properties

A new Cd(II) metal-organic coordination polymer, {[Cd(eoip)(bipy)(H2O)]center dot H2O}(n) (1), (H(2)eoip = 5-ethoxy-isophthalic acid, bipy = 2,2'-bipyridine), was assembled under hydrothermal condition by the reactions of Cd(II) acetate with H(2)eoip and bipy. Complex 1 was characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 was also characterized by TG and PXRD. The results reveal that the two carboxylic groups of each eoip ligand adopt chelate coordination modes to bridge adjacent Cd(II) ions to give a 1D chain along the b direction, the adjacent 1D chains are extended into a 3D supramolecular framework by hydrogen bonding. In addition, fluorescent properties of 1 were also investigated.