[N(CH₂CH₂NH₃)₃][U₃O₂F₁₃]·2H₂O: A Novel Organically Templated Mixed-Valent Uranium Oxyfluoride with a Hybrid Network Structure

The synthesis and characterization of a novel mixed-valent uranium oxyfluoride is described; the inorganic network consists of 2-D [U2F10]2- sheets constructed from corner- and edge-sharing UIVF9 tricapped trigonal prisms and 1-D [UO2F3]- chains constructed from edge-sharing UVIO2F5 pentagonal bipyramids with the organic cations and water molecules between the sheets. This is the first example with a hybrid network structure in the system of uranium fluoride or oxyfluoride. The variable-temperature magnetic susceptibility confirms the oxidation state of the uranium ions. Crystal data follow: C6H25N4O4F13U3, monoclinic, space group P21 (No. 4); a = 8.6876(4) Å, b = 7.3158(4) Å, c = 16.3376(8) Å, β = 93.7285(9)°, V = 1036.2(2) Å3, and Z = 2.本研究报道了一种新型混合价态铀氧氟化物（uranium oxyfluoride）的合成与表征。该无机网络由两类结构基元构成：一类为由共角与共边的四价铀（UIV）九氟三帽三角棱柱结构单元构筑的二维[U₂F₁₀]²⁻片层；另一类为由共边的六价铀（UVI）二氧五氟五角双锥结构单元构筑的一维[UO₂F₃]⁻链，有机阳离子与水分子填充于片层之间。 本材料为铀氟化物或铀氧氟化物体系中首例具备杂化网络结构的案例。 变温磁化率测试证实了体系中铀离子的氧化价态。 其晶体学数据如下：化学式C₆H₂₅N₄O₄F₁₃U₃，单斜晶系，空间群P2₁（编号4）；晶胞参数a=8.6876(4) Å，b=7.3158(4) Å，c=16.3376(8) Å，β=93.7285(9)°，晶胞体积V=1036.2(2) ų，Z=2。