Effects of Te(IV) Oxo-Anion Incorporation into Thorium Molybdates and Tungstates

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• 作者：Bin Xiao ; Martina Klinkenberg ; Dirk Bosbach ; Evgeny V. Suleimanov ; Evgeny V. Alekseev
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：June 15, 2015
• 年：2015
• 卷：54
• 期：12
• 页码：5981-5990
• 全文大小：633K
• ISSN：1520-510X

文摘

The exploration of phase formation in the Th鈥揗o/W鈥揟e systems has resulted in four mixed oxo-anion compounds from high-temperature solid-state reactions: ThWTe₂O₉, Th(WO₄)(TeO₃), ThMoTe₂O₉, and Th₂(MoO₄)(TeO₃)₃. All four compounds contain edge-sharing thorium polyhedra linked by MoO₄/WO₆ and different tellurium oxo-groups to form three-dimensional frameworks. In ThWTe₂O₉, each helical Th based chain is connected by four tungstotellurite clusters resulting in a building fragment which has a cross-section of four-leafed clovers. The structure of Th(WO₄)(TeO₃) exhibits a multilayer-sandwich framework composed of thorium tellurite layers with tungsten chains in between. In the case of the molybdate family, ThMoTe₂O₉ and Th₂(MoO₄)(TeO₃)₃ are built from puckered Th鈥揟e sheets which are further interconnected by MoO₄ tetrahedral linkers. The DSC-TG technique was performed to gain insight into the thermal behavior of the synthesized compounds. Raman spectra of as-prepared phases were obtained and analyzed for signature peaks.