TWO NEW CADMIUM(II) COORDINATION POLYMERS WITH BIS(BENZIMIDAZOLE) LIGANDS
X.-B. Liu, Y.-Q. Zhao, W.-L. Liu, G.-H. Cui
North China University of Science and Technology, Tangshan, Hebei, P.R. China
Keywords: bis(benzimidazole, cadmium(II) coordination polymer, crystal structure, fluorescence
Abstract
Two new cadmium(II) coordination polymers, {[Cd(L1)(tbta)]×H2O}n (1) and [Cd(L2)(tbta)]n (2) (L1 = 1,4-bis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene, H2tbta = tetrabromoterephthalic acid and L2 = 1,4-bis(2-methylbenzimidazol-1-ylmethyl)benzene) are obtained under hydrothermal conditions and structurally characterized by single crystal X-ray diffraction methods, IR spectroscopy, TGA and elemental analysis. The L1 and L2 ligands differ by subtle variation of substituents at semi-rigid bis(benzimidazole) bakcbones. Complex 1 features a 3D threefold interpenetrating dia array with a 4-connected 66 topology. Complex 2 displays a 2D {44.62} sql/Shubnikov tetragonal plane network. Complexes 1 and 2 possess high thermal stabilities and promising fluorescence behavior in the solid state.
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