| Benzimidazole derivatives and their complexs with transitional metal have attracted extensive attention due to their important application on the analogy of metal enzyme and albumen, acid inhibition, cell protection,antivirus, antitumour and so on. In this paper, three new ligand of benzimidazole derivatives: 3,3'-bis(2-benzimidazolyl)-2,2'-bipyridine(L1), 3,3'-Bis[2-Bis(2-ethylbenzimidazol-yl)]-2,2'-dipyridine (L2), 3,3'-Bis [2-Bis(2-benzylbenzimidazolyl)]-2,2'-dipyridine (L3) have been synthesized; determinated their structure and got their complexs with transitional metal copper and zinc. All compounds were charactered by X-ray diffraction , IR, elementary analysis, 1HNMR , Uv-visible spectrum and Fluorescence spectral.1. The molecules L1,L2, L3 crystallize in the space group P2(1)/n, C2/c, P2(1)/c respectively and all belongs to monoclinic. They have similitude structure and all have hydrogen bonding, but the corresponding dihedral angle of them aren't consistent.2. Seven complexs are : [CuL1]Cl2·(DMF)2( 1), [CuL2]Cl2 (2), [CuL3]Cl2·DMF (3) , [Cu(L1)2]ClO4·(DMF)2(H2O)2 (4), [Cu(L2)2](ClO4)2·H2O (5) , [Cu(L3)2](ClO4)2·(DMF)2 (6 ), [Zn(L1)2](ClO4)2DMF·H2O (7 ). Their crystal system and space group : monoclinic, C2/c (1); orthorhombic, Pbca(2); orthorhombic, P2(1)/c(3) ; triclinic, P-1(4); monoclinic, Cc(5); monoclinic, C2c(6); monoclinic, C2/c(7). The center irons of complex (1),(2),(3) are four-coordinated by two N atoms from two imidazoles and two Cl- ions; while in complexs (3), (4), (5), (6)and (7) metal ions are four-coordinated by four N atoms of imidazoles. All geometry of the center metal can be described as slight distorted tetrahedron. Hydrogen bonds existent in all complexs which make the molecule chain or reticulation configuration.3. Comparing with all ligand and their complexs from the Ultraviolet spectroscope, it was showed that they all have strong UV adsorption in the range of 200300nm(wavelength), and the maximum absorption wavelength of all complexs have red shift or blue shift which show the coordination interaction. |
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