Abstract
Hydrothermal reactions of 3,5-bis(benzimidazol-1-ylmethyl)benzoic acid (HL) with Cd(II), Cu(II) and Zn(II) salts provide eight new metal complexes which were characterized by single crystal and powder X-ray diffraction, IR, elemental and thermogravimetric analyses. Two cadmium frameworks [Cd(L)2]·2H2O (1) and [Cd(L)Cl] (2) have 3D structures with (42.65.83)(42.6) and rtl (4.62)2(42.610.83) topologies, respectively. Structural diversity of four copper complexes [Cu3(L)2]·NO3·0.5H2O (3), [Cu2(HL)2(SO4)]·3.5H2O (4), [Cu(L)(bdc)0.5]·1.5H2O (5) and [Cu2(L)(HL)(Hbdc)] (6) (H2bdc=1,4-benzenedicarboxylic acid) is achieved through the alteration of copper salts and addition of auxiliary ligand. As a result, 3 has a 1D ladder structure, 4 is a discrete dinuclear complex, 5 displays a (3,4)-connected 2-nodal 3-fold interpenetrating framework with (42.6.102.12)(42.6) topology, 6 exhibits a 4-connected uninodal 2D sql (44.62) network. Within the zinc series, ZnCl2 and ZnSO4 were used for the syntheses of [Zn(L)Cl] (7) and [Zn(L)(SO4)0.5]·2H2O (8), respectively. 7 shows a 3-connected uninodal 2D hcb network with (63) topology and 8 is a (3,6)-connected 2-nodal 3D framework with (42.6)2(44.62.88.10) topology. The luminescent properties of the Cd(II) and Zn(II) complexes were investigated.
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