Anderson结构铁钼杂多酸稀土盐的合成与结构表征  

Synthesis and characterization of Ln[FeMo_6O_(24)H_6] heteropoly complexes

作　　者：马冀[1] 周百斌[1] 马慧媛[1] 郭元茹[1] 韦永德[2] 

机构地区：[1]哈尔滨师范大学化学系,黑龙江哈尔滨150080 [2]哈尔滨工业大学应用化学系,黑龙江哈尔滨150001

出　　处：《分子科学学报》2004年第3期18-23,共6页Journal of Molecular Science

基　　金：国家自然科学基金(20371014);黑龙江省教育厅科研项目(10531070);哈尔滨市学科后备带头人基金(2002AFXXJ050)

摘　　要：　制备了具有Anderson结构的铁钼杂多酸稀土盐,经元素组成分析、TG和ICP确定其通式为Ln[FeMo6O24H6](Ln3+=La,Ce,Pr,Nd,Sm,Gd,Dy,Yb).采用IR,UV,95Mo-NMR,XRD等方法进行了结构表征,发现在IR光谱图上呈现出羟基和H2O的两个振动谱带,并进行了归属,表明此类杂多酸稀土盐属Anderson结构B型.借鉴TG-DTA、不同温度下的IR和XRD及水溶性实验对Ln[FeMo6O24H6]和(NH4)3[FeMo6O24H6]的热解性质研究表明,此类杂多酸稀土盐的分解温度为350～400℃,比母体酸盐的热稳定性提高了10℃.The synthesis of heteropoly complexes of ferromolybdate with Anderson stucture was reported in this paper.Their general molecular formulas are Ln(Ln^(3+)=La,Ce,Pr,Nd,Sm,Gd,Dy,Yb)which were determined by elemental analysis,TG and ICP.They are characterized by IR,UV,^(95)Mo-NMR and XRD.From the IR spectrum,we can see the vibration band of —OH and that of H_2O.The results indicate that this kind of heteropoly complexes belonge to the B type of Anderson structure.By TG-DTA,IR and XRD at various temperature,water solubility test and the study of pyrolysis property of Ln[FeMo_6O_(24)H_6] and (NH_4)_3[FeMo_6O_(24)H_6],it was showed that the range of pyrolysis temperature is 350～400 ℃ and 10 ℃ higher than that of matrix.

关 键 词：ANDERSON结构 铁钼杂多酸稀土盐 合成 红外吸收光谱 热解性质 

分 类 号：O614.811[理学—无机化学] O614.612[理学—化学]