Two new metal-organic frameworks possessing binodal high-connected topologies based on Cd4-clusters and organic ligands

Two new compounds, [Cd-2(bptc)(bpimb)(H2O)]center dot 2H(2)O (1) and [Cd-2(bptc)(bpib)]center dot 4H(2)O (2) (where H(4)bptc = biphenyl-3,3',4,4'-tetracarboxylic acid, bpimb = 1,3-bis((2-(pyridin-2-yl)-1H-imidazol-1-yl)methyl)benzene, bpib = 1,4-bis(2-(pyridin-2-yl)-1H-imidazol-1-yl)butane), were synthesized by reactions of the corresponding metal salts with H(4)bptc and N-containing auxiliary ligands and their structures have been determined by single-crystal X-ray diffraction. Compound 1 is built by Cd-4-clusters which further construct a 3-D (3,8)-connected framework with tfz-d notation; 2, also built by Cd-4-clusters, is a 3-D (4,8)-connected framework with (3(2).4(2).5(2))(3(4).4(8).5(12).6(4)) topology. In addition, the elemental analyses, infrared spectra, fluorescence, and thermogravimetric analyses for 1 and 2 are discussed.