三空缺杂多阴离子衍生物的合成与性质

Syntheses and properties of the derivatives of tri-vacant heteropoly anions with Wells-Dawson structure

合成了三空缺WellsDawson杂多阴离子的衍生物Na20[M2(X2W15O56)2].nH2O,其中X=P,As;M=Mn,Co,Cu,Zn,用红外光谱、可见光谱、极谱及元素分析对其进行了表征.用极谱法研究了这些化合物在水溶液中的稳定性和反应性,其极谱行为与单空缺阴离子2αP2W17O6110-相似,在4.2<pH<5.6的缓冲溶液中可稳定存在.

Derivatives of tri-vacant heteropoly anions with Wells-Dawson structure (Na_(20)[M_2 X_2)W_(15)O_(56)))_2]·nH_(2)O,X=P,As;M=Mn,Co,Cu,Zn were synthesized and characterized by IR, UV-Vis spectroscopy, polarography and element analysis. Stability and reactivity of the derivatives in solution were investigated. The polarographic behaviours of the derivatives are similar to that of α_2-P_(2)W_(17). The anions are stable in buffer solution of LiAc-HAc with 4.2<pH<5.6.