Studies　on　the　Reactivities　of　Undecatungstogallates　K＿n［GaW＿（11）O＿（39）M（H＿2O）］·xH＿2O（M＝Mn，Co，Ni，Cu，Cr，FeorZn）  

作　　者：LIU Jing-fu ZHAN Xiao-peng WANG Fu-quan  LI Guo-ping YANG Qi-hua and WANG Jing-ping( Department of Chemistry , Northeast Normal University , Changchun , 130024) 

出　　处：《Chemical Research in Chinese Universities》1995年第1期1-8,共8页高等学校化学研究（英文版）

摘　　要：ndecatungstogallates K_n[GaW_(11)O_(39)M (H_2O)]· xH_2O (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 Cu￣Ⅰ to Cu￣Ⅰ and oxidation of Mn￣Ⅱ to Mn￣Ⅲ and Mn￣Ⅳ. The title het-eropolyanions show catalysis effect on olefin epoxidation by iodosylbenzene or hy-drogen peroxide.ndecatungstogallates K_n[GaW_(11)O_(39)M (H_2O)]· xH_2O (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 Cu￣Ⅰ to Cu￣Ⅰ and oxidation of Mn￣Ⅱ to Mn￣Ⅲ and Mn￣Ⅳ. The title het-eropolyanions show catalysis effect on olefin epoxidation by iodosylbenzene or hy-drogen peroxide.

关 键 词：Undecatungstogallate with a transition metal Redox property Olefinepoxidation. 

分 类 号：O611.6[理学—无机化学]