Synthesis, characterization and fluorescence of a one-dimensional cadmium(II) compound involving covalent and hydrogen bonds

The title compound [Cd(Hq)(2)(Hdpa)(2)] (Hq = 8-hydroxyquinoline, H(2)dpa = diphenic acid) has been synthesized and characterized by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group C2/c with a 20.6880(5), b = 14.2584(4), c = 13.4776(4) angstrom, beta = 113.434(2)degrees, C46H28Cd1N2O10, M-r = 881.10, V = 3647.68(17) angstrom(3), Z = 4, D-c = 1.604 g/cm(3), F(000) = 1784, mu = 0.668 mm(-1), the final R 0.0576 and wR = 0. 1157 for 2631 observed reflections with I > 2 sigma(I). The centrosymmetric Cd(II) ion is six-coordinated in a slightly distorted octahedral geometry. The intermolecular hydrogen bonds extend the mononuclear structure into a one-dimensional supramolecular framework. The fluorescence spectrum of the compound exhibits intense emission at 520 nm when excited at 330 nm in solid state at room temperature.