Structure of Hydrated Tungsten Peroxides [WO2(O2)H2O]·nH2O

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• 作者：Brigitte Pecquenard ; Socorro Castro-Garcia ; Jacques Livage ; Peter Y. Zavalij ; M. Stanley Whittingham ; and René ; Thouvenot
• 刊名：Chemistry of Materials
• 出版年：1998
• 出版时间：July 1998
• 年：1998
• 卷：10
• 期：7
• 页码：1882 - 1888
• 全文大小：196K
• 年卷期：v.10,no.7(July 1998)
• ISSN：1520-5002

文摘

Hydrated tungsten peroxides have been synthesized via the reaction of tungstic acid, H₂WO₄, with aqueous solutions of hydrogen peroxide. Two crystalline phases with the formula[WO₂(O₂)H₂O]·nH₂O were obtained. X-ray powder diffraction data show that these twophases crystallize with monoclinic symmetry. Their structures were solved by using directmethods, and then full profile Rietveld refinements were carried out. As in other peroxocompounds, the coordination polyhedron around W^VI can be described by a [WO₆] distortedoctahedron in which one corner is replaced by a peroxo ligand (O₂). Both structures aremade of zigzag double chains built up of edge-sharing octahedra along the b-axis.Coordinated water molecules join the chains to make the layers. In the case of n 0,additional water molecules link the layers together through hydrogen bonds.