The decatungstomolybdoniobogermanic heteropoly acid H5[GeW10MoNbO40]·20H2O has been prepared for the first time. The optimal proportion of the solutions of the component and the pH of the synthesis reaction are given. The product was characterized by chemical analysis, conductometric and potentiometric titration, IR, UV, XRD, 183W NMR and TG-DTA. The IR, UV, XRD and 183WW NMR indicate that H5[GeW10MoNbO40]·20H2O possesses the Keggin structure. The TG-DTA curve shows the sequence of water loss in the acid, the amount of the loss as well as the thermostability of the acid.
Bibliographical noteFunding Information:
The financial support from the China Postdoctoral Science Foundation and the Natural Science Foundation of Zhejiang University for this work is greatly appreciated.
Copyright 2008 Elsevier B.V., All rights reserved.
- Deca-tungstomolybdoniobogermanic acid
- Heteropoly acid