Correlations and Differences between Uranium(VI) Arsonates and Phosphonates

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• 作者：Pius O. Adelani ; Laurent J. Jouffret ; Jennifer E. S. Szymanowski ; Peter C. Burns
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：November 5, 2012
• 年：2012
• 卷：51
• 期：21
• 页码：12032-12040
• 全文大小：629K
• 年卷期：v.51,no.21(November 5, 2012)
• ISSN：1520-510X

文摘

Three new uranium arsonate compounds, UO₂(C₆H₅)₂As₂O₅(H₂O) (UPhAs-1), UO₂(HO₃AsC₆H₄AsO₃H)(H₂O)路H₂O (UPhAs-2), and UO₂(HO₃AsC₆H₄NH₂)₂路H₂O (UPhAs-3) have been synthesized under mild hydrothermal conditions. UPhAs-1 is constructed from UO₇ pentagonal bipyramids that are chelated by the pyroarsonate moiety, [PhAs(O₂)OAs(O₂)Ph]^{2鈥?/sup>, forming chains of layered uranyl polyhedra. Two of the phenylarsonic acids are condensed in situ to form the fused tetrahedra of the pyroarsonate moiety through a metal-mediated, thermally induced condensation process. The structure of UPhAs-2 consists of UO₇ pentagonal bipyramids that are chelated by phenylenediarsonate ligands, forming one-dimensional chains of uranyl polyhedra. UPhAs-3 consists of a rare UO₆ tetragonally distorted octahedron (D_4h) that is on a center of symmetry and linked to two pairs of adjacent 4-aminophenylarsonate ligands. This linear chain structure is networked through hydrogen bonds between the lattice water molecules and the 鈭扤H₂ moiety. All three of these compounds fluoresce at room temperature, showing characteristic vibronically coupled charge-transfer based emission.}