Ln[CrMo_6O_(24)H_6]杂多配合物的合成与表征

Synthesis and characterization of Ln[CrMo_6O_(24)H_6] heteropoly complexes

合成了具有Anderson结构的Ln[CrMo6 O2 4 H6 ] (Ln3+=La ,Ce,Pr,Nd ,Sm ,Gd ,Dy ,Yb)的 8种杂多配合物 ,此类配合物属Anderson结构B型 .通过ICP和TG及元素组成分析 ,确定了配合物的组成 ,利用IR ,UV ,95 Mo -NMR ,ESR ,XRD等方法进行了表征 ,借助TG -DTA、不同温度下的IR和XRD以及水溶性实验研究了配合物热解性质 ,结果表明 ,配合物分解温度为 3 50℃～ 40 0℃ .

The synthesis of heteropoly complexes of Ln[CrMo 6O 24 H 6](Ln 3+ =La, Ce,Pr,Nd,Sm,Gd,Dy,Yb)with Anderson structure was reported in this paper. It belongs to the B-type of Ande rson structure in which the heteroanion is coordinated by six-OH to form octahedral. Their general molecular formulas were determined by elemental analysis. They are characterized by UV, 95 Mo-NMR, ESR of Cr 3+ , TG-DTA,IR and XRD at various temperature and water solubility test. The results indicated that the rang of pyrolysis temperature is 350 ℃～400 ℃.