Syntheses, Crystal Structures, Luminescent and Magnetic Properties of Three Ni(II), Zn(II) and Cd(II) Coordination Polymers Based on an Ether-bridged Tetracarboxylic Acid

Two 1D and one 3D coordination polymers, namely [Ni-2(mu(3)-deta)(H(2)biim)(3)(H2O)](n) (1), {[Zn-2(mu(4)-deta)(phen)(2)(H2O)]center dot H2O}(n) (2) and [Cd-2(mu(6)-deta)(phen)(2)(H2O)]n (3), have been constructed hydrothermally using H(4)deta (H4deta = 2,3,3',4'-diphenyl ether tetracarboxylic acid), H(2)biim (H(2)biim = 2,2 '-biimidazole), phen (phen = 1,10-phenanthroline), and nickel, zinc or cadmium chlorides at 160 degrees C. The products were isolated as stable crystalline solids and characterized by IR spectra, elemental analyses, thermogravimetric analyses (TGA) and single-crystal X-ray diffraction analyses. Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the triclinic system, space group P (1) over bar. Compounds 1 and 2 disclose a 1D chain structure. Compound 3 features a 3D framework. The structural diversity of compounds 1 similar to 3 is driven by the metal(II) node and the type of supporting ligand. Magnetic studies for compound 1 demonstrate an antiferromagnetic coupling between the adjacent Ni(II) centers. The luminescence behavior of compounds 2 and 3 was also investigated.