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在水溶液中合成了一种纯无机的同多钨酸盐Na_(10)[H_2W_(12)O_(42)]·20H_2O·2HCOOH(1),并通过红外光谱和X射线单晶衍射对其结构进行了表征.X射线单晶衍射表明1属于三斜晶系P-1空间群,由1个[H_2W_(12)O_(42)]~(10-)聚阴离子、10个Na~+离子、20个游离的水分子和2个游离的甲酸分子组成.1中的[H_2W_(12)O_(42)]~(10-)聚阴离子由4个以共角方式相连的三金属钨氧簇构成.值得注意的是这4个三金属钨氧簇可以被分成两组:其中2个位于赤道位置,可以描述为{W_3O_(14)};另外2个三金属钨氧簇则处于极位,可以描述为{W_3O_(13)}.此外,我们在室温下对其电化学行为进行了研究.
A pure inorganic isopolytungstate Na_ (10) [H_2W_ (12) O_ (42)] · 20H_2O · 2HCOOH (1) was synthesized in aqueous solution. Its structure was characterized by IR and X-ray single crystal diffraction X-ray single crystal diffraction indicated that 1 belongs to the triclinic P-1 space group and consists of 1 [H_2W_ (12) O_ (42)] ~ (10-) polyanion, 10 Na ~ + ions, 20 free water molecules and 2 free formic acid molecules. The [H_2W_ (12) O_ (42)] ~ (10-) polyanion in 1 consists of four trimetal tungsten oxygen clusters connected in a diagonal manner It is noteworthy that the four trimetal tungsten oxygen clusters can be divided into two groups: two of which are located in the equatorial position, which can be described as {W_3O_ (14)}; the other two trimetal tungsten oxygen clusters are at the extreme positions, Described as {W_3O_ (13)}. In addition, we studied its electrochemical behavior at room temperature.