具有β_2-Keggin结构主族元素钨砷杂多配合物的合成与性质

Synthesis and properties of substituted β_2-Keggin structure heteropolytungstoarsenate

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 ℃.