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本文首次报道通式为K_(19)〔Ln(α_2—P_2Mo_(16)VO_(61))_2〕·nH_2O的四元杂多酸盐的合成条件、结构及基本物理化学性质研究的有关内容。用元素分析、电导测定及离子交换实验、红外、紫外及热分析鉴定了这些配合物,从而推测配体P_2Mo_(16)VO_(61)-为α_2—型Dawson结构,当配体与稀土离子Ln~(3+)形成配合物后,Ln~(3+)与配体空穴外沿的桥氧进行配位,形成配位数为8、结构与K_(16)[Cc(IV)(α_2—P_2W_(17)O_(61))_2]·50H_2O相似的四方反棱柱型配合物。
In this paper, the synthesis conditions, structure and basic physical and chemical properties of quaternary heteropolyacid salts of K_ (19) [Ln (α_2-P_2Mo_ (16) VO_ (61)) _2] nH_2O are reported for the first time. The complexes were identified by elemental analysis, conductivity measurement and ion exchange experiments, infrared, ultraviolet and thermal analysis. It was speculated that the ligand P_2Mo_ (16) VO_ (61) - was an α_2-type Dawson structure. (3+), the Ln ~ (3+) coordinates with the bridging oxygen on the outer edge of the ligand hole to form a coordination number of 8. The structure and K_ (16) [Cc (IV) -P_2W_ (17) O_ (61)) _2] · 50H_2O similar tetragonal anti-prismatic complexes.