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Synthesis, crystal structure and properties of a new organic-inorganic hybrid Dawson-like polyoxotungstate [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O

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Abstract

A new organic-inorganic hybrid polyoxometalate based on Dawson-like polyoxotungstate anion [SbW18O60]9−, formulated [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O (2,2′-bpy=2,2′-bipyridine) has been synthesized from Sb2O3, Na2WO4, CoCl2, and 2,2′-bipyridine materials by hydrothermal method, and which was characterized by elemental analyses, IR, XPS, EPR, TG, and X-ray single crystal diffraction. Structure analysis shows that the polyoxoanion self-assembled under hydrothermal conditions consists of a Dawson-like polyoxotungstate cluster anion [SbW18O60]9− encapsulating capsulating a pyramidal {SbO3{ group within the {W18{ cluster cage. EPR spectra show that the high-spin octahedral Co∥ and low-spin Co∥ ions coexist in the title compound. Magnetic properties indicate that the compound is antiferromagnetic.

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Authors and Affiliations

  1. Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475001, China

    Wang JingPing, Ma PengTao & Niu JingYang

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  1. Wang JingPing
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  2. Ma PengTao
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Correspondence to Niu JingYang.

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Supported by the Program for New Century Excellent Talents in University of Henan Province (2005HANCET-02), the Natural Science Foundation of Henan Province, the Program for Training Young Excellent Cadreman Teachers in University of Henan Province, the Stress Foundation of Henan University(05ZDZR002)

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Wang, J., Ma, P. & Niu, J. Synthesis, crystal structure and properties of a new organic-inorganic hybrid Dawson-like polyoxotungstate [Co(2,2′-bpy)3]2[Co(2,2′-bpy)2Cl][Co(2,2′-bpy)2]H2[SbW18O60]·4H2O. Sci. China Ser. B-Chem. 50, 784–789 (2007). https://doi.org/10.1007/s11426-007-0140-7

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  • DOI: https://doi.org/10.1007/s11426-007-0140-7

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