Preparation and properties of the molybdovanadophosphoric acids with Dawson structure

Abstract

Five free molybdovanadophosphoric acids having Dawson structure were prepared by the use of an improved procedure. The effect of reaction conditions on the formation of the 5 heteropolyacids was studied. The constitutions of these heteropolyanions are [P2Mo17VO62]7-, [P2Mo16V2O62]8-, [P2Mo15V3O62]9-, [P2Mo14V4O62H2]8-, [P2Mo13V5O62H2]9-. TGA and DTA were performed on these heteropolyacids. Potentiometric titration, IR and UV spectra and x-ray power diffraction were studied.

Key words: INFRARED SPECTROPHOTOMETRY, HETEROPOLYACID, CATALYST, X-RAY DIFFRACTION ANALYSIS, POTENTIOMETRIC TITRATION, THERMAL STABILITY, STRUCTURAL ANALYSIS, PHOSPHATE P, THERMOGRAVIMETRY, DIFFERENTIAL THERMAL ANALYSIS

CLC Number:

O612
O643

Cite this article

WANG ENBO;GAO LIHUA;LIU JINGFU;LIU ZONGXU;YAN DEHUAN. Preparation and properties of the molybdovanadophosphoric acids with Dawson structure[J]. Acta Chimica Sinica, 1988, 46(8): 757-762.

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具有Dawson结构的钼钒磷杂多酸的制备和性质研究