摘要
通过极谱和循环伏安法,结合紫外光谱和X射线光电子能谱研究了过渡元素K（?）〔MW_(11)O_(39)Ni(H_2O)〕·xH_2O(M=Si、Ti、Ga、Zr)在溶液中的氧化还原性质,提出了它们的还原机理,杂多阴离子的极谱半波电位顺序为Zr>Ti>Ga>Si,发现杂多阴离子的E_(1/2)与M元素的电负性有线性关系.
The redox properties of heteropolytungstates Kn[MW11O39Ni(H2O)] .xH2O (M= Si, Ti,Ga,Zr) in solution are studied with polarography and cyclic voltammetry, together with ultraviolet spectroscopy and X-ray photoelectron spectroscopy. The order of polarographic half-wave potential (E1/2) of heteropoly anious is as follows; Zr>Ti>Ga>Si. We have found that the E1/2 of heteropoly anious could corelate linearly with the eletronetivities of M.
