| With the development of coordination chemistry, supramolecular chemistry andmaterial science, the design and research of molecular-based magnet is of the bestattractive thesis in present. Because of its unique properties, dicyanamide ligandcoordination complexes play an important role in the field of magnetic chemsitry. Since1980's, with more and more good ferromagnetic cyanide coordination complexes beingfound, the synthesis and research of them were in great progress.We have made research in the design, synthesis, structure and characteristic ofdicyanamide ligand coordination complex and obtained some good conclusions. Wesynthesized six coordination complexes using dicyanamide ligand and transition metalcations Mn(Ⅲ), Ni(Ⅱ), Cu(Ⅱ), Cd(Ⅱ), Mn(Ⅱ) and Co(Ⅱ), namely,[Mn(acacen) {N(CN))2}]n(1), [Ni(teta){N(CN)2}2](2), [Cu(teta){N(CN)2·ClO4}2·H2O](3), [Cd(bim)2(dca2)]n(4), [Mn(bim)2(dca2)]n (5), [Co(bim)2(dca2)]n (6). They weresynthesized and characterized by elementary analyses, IR and X-ray diffraction analyses.We have also characterized TG-DSC and luminescence of 4 and magnetic of 1 and 6.We mainly selected bis(acetylacetone)ethylenediimine (H2acacen), 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (teta) and benzimidazole (bim) as thesecond ligand and dicyanamide ligand, synthesized six different complexes with differentmetal anions Mn(Ⅲ), Ni(Ⅱ), Cu(Ⅱ), Cd(Ⅱ), Mn(Ⅱ) and Co(Ⅱ), and characterized them.We find complexes 2 and 3 are mononuclear structures, complex 1 is one-dimensionalchain, complexes 4, 5 and 6 are two-dimensional(4,4) networks. Though, the first ligandis the same, we can get different complexes when we use the different second ligand andmetal anions. It shows that much condition influence the complexes when they informed, especially, the influence of the second ligand. |
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