活性粉状白钨酸与十聚、六聚及其他多聚钨酸盐的联系和应用

CORRELATION OF ACTIVE WHITE POWDERY TUNGSTIC ACID WITH DECA-AND HEXA-TUNGSTATES TOGETHER WITH THEIR RECENT DEVELOPMENTS

本文扼要总结了作者近年来关于活性粉状白钨酸与十聚、六聚钨酸的工作,包括它们的制备、分离及相互转化。聚钨酸有机铵盐的光敏性,活性粉状白钨酸用于合成众多新化合物,对三价钨的簇合物以及从WO_4^(2-)转变到黄钨酸系列过程的推测等也给予了相应的评述。

Through ion exchange reaction together with the use of electron pair donor organic re-agents, active white powdery tungstic oxide hydrate (abbr. WPTA) can be separated intomutually convertible deca- and hexa-tungstates. A brief sketch of procedures is given inscheme 1. The success of the above mentioned method in getting deca- and hexa-tungstates pro-mptly led to our new method of preparing deca- and hexa-tungstates through oxidation oftungsten carbide with hydrogen peroxide. Many applications of WPTA, together with different polytungstates prepared therefrom,as an extension of those listed in our previous report~[3], with significant new addtionsincluding photo-chromic polytungstates, have been hereby presented. The acidification scheme connecting sodium tungstate to yellw tungstic acid has beenproposed through the incorporation of deca- and hexa-tungstates. A Brief sketch is givenis scheme 2.