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钼钒硅杂多化合物(A_(4+n)[SiMo_(12-n)VnO_(40)]·XH_2O)一般都是用强酸酸化—乙醚萃取法制备。目前这一系列化合物中含钒量最高的n=2。基本属于1:12系列Keggin结构。对其光谱,结构研究比较零散,不系统。不论在溶液中还是在固体状态都是较不稳定的。在水中或在有机溶剂中的还原都属于4个电子还原,氧化还原电位在0.64～0.77之间。其碱度与溶剂有关。 n≥3高含钒量的钼钒硅杂多化合物的合成,此类化合物结构测定,理想的组成分析方法以及在催化剂中进一步的应用等问题还有待于进一步研究。
Molybdenum vanadium silicon heteropoly compounds (A_ (4 + n) [SiMo_ (12-n) VnO_ (40)] · XH_2O) are generally prepared by strong acidification-ether extraction. The current series of compounds containing the highest vanadium n = 2. Basically belong to 1:12 series Keggin structure. The spectrum, the structure of the study more fragmented, not systematic. Both in solution and in the solid state are less stable. The reduction in water or in organic solvent all belongs to 4 electron reduction, the redox potential is between 0.64 ~ 0.77. Its alkalinity and solvent-related. The synthesis of molybdenum-vanadium-silicon heteropoly compounds with n≥3 high content of vanadium, the determination of the structure of these compounds, the ideal compositional analysis method and the further application in the catalyst have yet to be further studied.