• Two hybrids based on Keggin polyoxometalates and dinuclear copper(II) complexes: syntheses, structures and electrocatalytic properties

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    • Keywords


      Polyoxometalate; Keggin; dinuclear copper; electrocatalysis.

    • Abstract


      By introducing mixed-ligands en and ox, Cu²⁺ and different polyoxotungstates as synthons, two new polyoxotungstate-based inorganic-organic hybrid compounds {[Cu₂ (en) &#8322 (ox)][HPW₁₂O₄₀]} · (en) ₂ · 2H₂O (1) and {[Cu₂ (en) ₂ (ox)] [H₃BW₁₂O₄₀]} · (en) ₂ · 2H₂O (2) (en = ethylenediamine and ox = oxalate), were obtained in identical hydrothermal conditions and further characterized by elemental analyses, IR spectroscopy and single-crystal X-ray diffraction. Structural analyses revealed that both compounds are isostructural, and show one-dimensional (1D) chain constructed by [XW₁₂O₄₀]n− (X = P 1, B 2) Keggin-type polyoxoanions and [Cu₂ (en) ₂ (ox)] ²⁺ dinuclear copper subunits. The electrochemical experiments indicated that 1-based carbon paste electrode possesses high catalytic efficiency and selectivity towards reduction of H₂O₂, and thus 1 has potential to detect H₂O₂.

    • Author Affiliations



      1. Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150040, People’s Republic of China
      2. College of Pharmaceutical Sciences, Heilongjiang University of Chinese Medicine, Harbin 150040, People’s Republic of China
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