A unique metal-organic framework [Cd2（L）1.5（μ3-OH）（H2 O）2 ]·2H2 O（1, H2 L = 2,5-dibenzoylterephthalic acid） has been synthesized under hydrothermal conditions, and characterized by single-crystal X-ray diffractions, elemental analyses, IR spectra and fluorescence spectrum. The compound is of triclinic system, space group P1, C33 H27 CdO14, Mr = 870.33, a = 12.2939（17）, b = 12.5135（9）, c = 13.2046（10）, α = 115.3190（10）, β = 96.9140（10）, γ = 109.7950（10）°, V = 1641.6（3）3, Z = 2, Dc = 1.761 g/cm3, F（000） = 862, μ（MoK） = 1.366 mm-1, Rint = 0.0148, R = 0.0240 and wR = 0.0639 for 5995 observed reflections with I 〉 2σ（I）. X-ray analysis shows that the title complex exhibits a 3D framework with（412·63） topology, in which the tetra-nuclear [Cd4（μ3-OH）2 ] clusters act as 6-connected nodes, and the L ligands can be simplified to be linear connectors. Moreover, the thermal stability and fluorescence have been studied in detail.
采用溶胶凝胶法合成Ce0.8Nd0.2O1.9(NDC)粉体,分别将1%(x,摩尔分数)的过渡金属氧化物(Transitional Metal Oxides,TMOs)MnO2,FeO1.5或CoO添加到NDC粉体中,经10MPa压片后于1 300℃烧结6h。用X射线衍射(XRD)和场发射扫描电子显微镜(FE-SEM)对样品进行结构表征,采用交流阻抗谱(AC)测试样品导电性能。结果表明,MnO2,Fe2O3或CoO对NDC均可有效促进样品的致密化,增加相对致密度和提高NDC的晶粒电导率;1%(x)MnO2或1%(x)CoO的掺杂对NDC的晶界电导率产生有害的影响,掺杂1%(x)FeO1.5对NDC晶界杂质SiO2有一定的清除作用,提高晶界电导率。Fe2O3不仅是一种良好的烧结助剂,而且是一种有效的晶界清除剂。
Ce6-xHoxMoO15-δ（0.0≤x≤1.2） was synthesized by modified sol-gel method and characterized by differential X-ray diffraction（XRD）, Raman, and X-ray photoelectron spectroscopy（XPS） methods. The oxide ionic conductivity of the samples was investigated by AC impedance spectroscopy. It shows that all the samples are single phase with a cubic fluorite structure. The solid solution Ce6-xHoxMoO15-δ（x=0.6） was detected to be the best conducting phase with the highest conductivity（σ1=1.05×10^-2 S/cm） at 800 ℃ and the lowest activation energy（Ea=1.09 eV）. These properties suggest that this kind of material has a potential application in intermediate-low temperature solid oxide fuel ceils.
