合成了4种主族元素取代的钨砷杂多配合物,通过ICP和TG曲线确定其通式为:K11.12[M(AsW11O39)2]·xH2O和K3.4EAsZ(OH2)W11O39]·xH2O(M=Pb^2+,Bi^3+;Z=Sn^4+,Sb^3+).采用IR,UV,XRD,XPS,^183W NMR等方法证明其结构为β2-Keggin结构,用极谱和循环伏安法研究了配合物的氧化还原性和热稳定性,结果表明:所合成的配合物只有一步双电子还原过程,电位较高,表现出强氧化性;配合物将在550℃~600℃范围内分解.
The β2-isomer Keggin structure heteropolytungstoarsenate complexes containing main group elements have been prepared and characterized by ICP,UV, IR,XPS,XRD and ^183W NMR. The redox behaviors of these complexes are investigated by cyclic voltammetry. The results indicate that redox processes are one-step and irreversible,showing redox abilities of these complexes is very strong. The thermostabilities of these complexes are also discussed. Complexes were decomposed in the range of 550℃-600 ℃.