Hydrothermal Synthesis, Crystal Structure and Fluorescence Properties of a Three-dimensional Triply-bridged Binuclear Zinc(II) Complex [Zn2(Mba)3(Phen)2EtOH)]•ClO4

The novel complex [Zn-2(Mba)(3)(Phen)(2)EtOH)]center dot ClO4 (Hmba = methoxybenzoic acid, Phen = 1,10-phenanthroline, EtOH = ethanol) was synthesized by hydrothermal reactions, and its structure was determined by X-ray diffraction. The crystal belongs to the triclinic system, space group P (1) over bar with a = 1.15362(1), b = 1.3655(3), c = 1.61451(1) nm, alpha = 72.842(2), beta = 83.259(3), gamma = 72.083(2)degrees, V = 2.3112(6) nm(3), Z = 2, mu(MoK alpha) = 11.71 cm(-1), F(000) = 1120, R = 0.0552 and wR = 0.1157 (I > 2 sigma(I)). The two centric zinc(II) ions in the complex locate in a distorted octahedral coordination geometry and a distorted trigonal bipyramid coordination geometry, respectively. Two bridging bidentate carboxyl groups and a mu(2)-O carboxyl group from three methoxybenzoic acids act as the bridge to link two Zn(II) ions. The asymmetric units are connected by pi-pi packing interactions between aromatic rings to form a three-dimensional supramolecular network. The experimental results show a good fluorescence property for the complex.