Hydrothermal Synthesis and Characterization of [(UO2)2F8(H2O)2Zn2(4,4'-bpy)2]·(4,4'-bpy), a Mixed-Metal Uranyl Aquoflu

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• 作者：Chih-Min Wang ; Chia-Hsien Liao ; Hsien-Ming Kao ; and Kwang-Hwa Lii
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：September 5, 2005
• 年：2005
• 卷：44
• 期：18
• 页码：6294 - 6298
• 全文大小：176K
• 年卷期：v.44,no.18(September 5, 2005)
• ISSN：1520-510X

文摘

A mixed-metal uranyl aquofluoride, [(UO₂)₂F₈(H₂O)₂Zn₂(4,4'-bpy)₂]·(4,4'-bpy), has been synthesized under hydrothermalconditions and has been structurally characterized by single-crystal X-ray diffraction, infrared spectroscopy,thermogravimetric analysis, emission spectroscopy, and solid-state NMR spectroscopy. It is one of the few uraniumfluoride-organic framework solids in which an organic molecule is directly incorporated into the extended structureof the metal fluoride and is the first example of mixed-metal uranium oxyfluoride incorporating an organic ligand.The structure consists of neutral layers of edge- and corner-sharing uranium-centered pentagonal bipyramids andzinc-centered octahedra, which are linked through 4,4'-bpy ligands into a 3-D framework. The ¹H MAS NMR spectrumis in support of the conclusion that the occluded 4,4'-bpy molecules in the structural channels are not protonated.Crystal data: monoclinic, space group P2₁/c, a = 9.4630(5) Å, b = 22.384(1) Å, c = 16.7534(8) Å, = 91.899(2),V = 3546.7(4) ų and Z = 4.