CRCU

Chemical Research in Chinese Universities ›› 1995, Vol. 11 ›› Issue (1): 1-8.

• Articles •     Next Articles

Studies on the Reactivities of Undecatungstogallates Kn[GaW11O39M(H2O)]· xH2O(M=Mn, Co, Ni, Cu, Cr, Fe or Zn)

LIU Jing-fu, ZHAN Xiao-peng, WANG Fu-quan, LI Guo-ping, YANG Qi-hua, WANG Jing-ping   

  1. Department of Chemistry, Northeast Normal University, Changchun, 130024
  • Received:1994-03-21 Online:1995-01-24 Published:2011-08-17
  • Supported by:

    Supported by the National Natural Science Foundation of China

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Abstract: ndecatungstogallates Kn[GaW11O39M(H2O)]· xH2O (M=Mn, Co, Ni, Cu,Cr, Fe or Zn) were prepared and their redox properties in solution were investigat-ed using polarographic and cyclic voltammographic methods.Experimental resultsindicated that the heteropolyanions underwent two-step, two-electron tungsten re-duction processes, and each reduction process was accompanied by protonation.The complexes of Cu and Mn exhibit voltammetric redox features corresponding toreduction of CuⅡ to CuⅠ and oxidation of MnⅡ to MnⅢ and MnⅣ.The title het-eropolyanions show catalysis effect on olefin epoxidation by iodosylbenzene or hy-drogen peroxide.

Key words: Undecatungstogallate with a transition metal, Redox property, Olefinepoxidation.