Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (4): 433-441.DOI: 10.11944/j.issn.1000-0518.2015.04.140277

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Synthesis, Crystal Structure and Catalytic Activity of a Dawson-type Tungstophosphate Decorated by Copper Complexes

ZHU Haotian, LI Xiaohui, BAI Jianping, LU Mingda, AN Yue*, YOU Wansheng*   

  1. School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian,Liaoning 116029,China
  • Received:2014-08-06 Revised:2014-10-16 Published:2015-04-10 Online:2015-04-10
  • Contact: Corresponding author:AN Yue, professor; Tel:0411-82156550; Fax:0411-82158559; E-mail:anyue_11@163.com; Research interests:organic synthesis
  • Supported by:

    Supported by the National Undergraduate Innovation and Entrepreneurship Training Program(No.201310165014), the Higher Education Research Program of Education Department of Liaoning Province of China(No.L2014421)

Abstract:

An inorganic-organic hybrid compound [Cu(H2biim)2(H2O)][{Cu(H2biim)2}2(P2W18 O62)]·11H2O(H2biim=2,2'-biimidazole)(1) has been hydrothermally constructed by the reaction of Cu(Ⅱ)-H2biim complexes and Dawson-type tungstophosphate, and characterized by single-crystal X-ray diffraction, infrared spectroscopy(IR), X-ray powder diffraction(XRD), elemental analysis and electrochemical analysis. Structural analysis shows that the polyanion [P2W18O62]6-, as a bidentate ligand, coordinates with two Cu2+ ions to form a bi-Cu(Ⅱ)-supporting heteropolyanion [{Cu(H2biim)2}2(P2W18O62)]2-, which is surrounded by an isolated [Cu(H2biim)2(H2O)]2+ and eleven H2O molecules. The presence of hydrogen bonds between H2biim molecules and polyoxoanion or water molecules, in company with the synergistic effect of electrostatic interactions and π-π stack, leads to the formation of a crystal material with 3D framework further. Compound 1 displays good electrocatalytic activity toward the reduction of H2O2 and Na2NO2. Meanwhile it is also a good acid-catalyst for the synthesis of cyclohexanone ethylene ketal and can be recycled.

 

Key words: copper complex, dawson structure, tungstophosphate, biimidazole, electrocatalytic activity, catalytic activity

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