含有{M[P_4Mo_6O_(31)]_2}夹心型磷钼酸盐构筑块的水溶性多酸化合物的合成与表征

Synthesis and characterization of a water-soluble polyoxometalate containing sandwich-shaped molybdenum phosphate building block {M[P_4Mo_6O_(31)]_2}

采用水热方法合成了一个新的磷钼酸盐化合物,并通过元素分析、红外、紫外、循环伏安和单晶X射线衍射分析等手段对其进行了表征.单晶结构解析结果表明,该化合物的阴离子{Na[Mo12O24(OH)6(PO4H)2(PO4H3/2)6]}6-由2个{Mo6P4O31}单元和一个八面体配位的金属钠离子共价组装形成,具有夹心型结构.该化合物是目前为止获得的第一个含有孤立M[Mo6P4O31]2夹心结构的水溶性多钼磷酸盐.该水溶性化合物将会作为一个基本的反应原料和基本构筑单元合成组装出更多结构新颖、性质丰富的新型多钼磷酸盐.

In this paper, a new molybdenum phosphate was synthesized via the hydrothermal method. We characterized the compound using elemental analysis, infrared spectroscopy, UV-visible spectroscopy, cyclic voltammetry and single-crystal X-ray diffraction. The single-crystal X-ray diffraction analysis revealed that the anion {Na[Mo12O24（OH）6（POaH）2（PO4H3/2）6]}6- is composed of two {Mo6P4O31 } units that are covalently linked via one octahedrally-coordinated Na＋ ion. The synthesized molybdenum phosphate is the first water-soluble molybdenum phosphate containing sandwich-shaped M[Mo6P4O31]2 building blocks. It can be used as a basic chemical reagent and building block for the assembly of more molybdenum phosphates of various structures, which will likely have a wealth of unique properties.