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Di- and tetranuclear heterometallic CuII-LnIII complexes (Ln = Gd and Dy): Synthesis, structure and magnetic properties

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  • Special Topic · Molecular Magnetism
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Abstract

Four 3d–4f heterometallic complexes, [CuIILnIII(bpt)2(NO3)3(MeOH)] (Ln = Gd, 1; Dy, 2; bptH = 3,5-bis(pyrid-2-yl)-1,2,4- triazole), [CuII 2LnIII 2(µ-OH)2(bpt)4Cl4 (H2O)2]·6H2O (Ln = Gd, 3; Dy, 4), have been synthesized under solvothermal conditions. X-ray structural analyses reveal that 1 and 2 are isostructural while 3 and 4 are isostructural. In each complex, the copper and gadolinium or dysprosium ions are linked by two triazolate bridges and form a CuII-LnIII dinuclear unit. The intramolecular Cu-Ln distances are 4.542, 4.525, 4.545 and 4.538 Å for 1, 2, 3 and 4, respectively. Two dinuclear CuLn units are bridged by two OH− groups into the zig-zag tetranuclear {CuII 2LnIII 2} structures with the Ln(III)...Ln(III) distances of 3.742 and 3.684 Å for 3 and 4, respectively. Magnetic studies show that the antiferromagnetic CuII-LnIII interactions occur in 1 (J CuGd = −0.21 cm−1) and 2. The antiferromagnetic interaction occurs in complex 3 with J CuGd = −0.82 cm−1 and J GdGd = −0.065 cm−1, while dominant ferromagnetic interaction occurs in complex 4.

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Authors and Affiliations

  1. Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education; State Key Laboratory of Optoelectronic Materials and Technologies; School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China

    ZeMin Zhang, FuSheng Guo, PengHu Guo, JunLiang Liu, ZhaoPing Ni & MingLiang Tong

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  1. ZeMin Zhang
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  2. FuSheng Guo
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Correspondence to MingLiang Tong.

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Zhang, Z., Guo, F., Guo, P. et al. Di- and tetranuclear heterometallic CuII-LnIII complexes (Ln = Gd and Dy): Synthesis, structure and magnetic properties. Sci. China Chem. 55, 934–941 (2012). https://doi.org/10.1007/s11426-012-4564-3

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