摘要
为考查稀土配合物的特殊性能，合成了间溴苯甲酸与钪（Ⅲ）、钇（Ⅲ）、镧（Ⅲ）、钆（Ⅲ）的四种配合物．确定其组成为ＬｎＬ_３（Ｌｎ＝Ｓｃ，Ｙ，Ｌａ，Ｇｄ；Ｌ＝３－ＢｒＣ_６Ｈ_４ＣＯＯ）．这些化合物均不溶于一般的有机溶剂，可溶于二甲基亚砜．摩尔电导数据表明它们是非电解质．通过紫外和红外光谱研究，确定稀土离子与羧基为对称的双齿配位．这些配合物的荧光为Ｌ~＊－Ｌ型荧光，不是稀土离子的特征跃迁，而是稀土离子微扰的配体的电子跃迁．差热—热重分析表明配合物热稳定性较好，并给出了熔点．氧化分解失重与计算值相符．
The solid state complexes of Sc(Ⅲ), Y (Ⅲ), La (Ⅲ), Gd (Ⅲ) with 3-bromobenzoic acid have been synthesized, in order to study their special property.The composition of the complexes determined by elementary analysis are RE (3-BrC_6H_4COO)_3. They all are isosoluble in general organic solvent, but are soluble in DMSO.These complexes have been characterized by UV.IR. fluoreacence spectra and molar conductivity. Thermoanalysis was done by TG and DTA for four complexes. Experimental results show that: These complexes are non-electrolytes. The ion of rare earth are chelate by symmetrical bidentate carboxyl group in these complexes. The fluorescence of these complexes are L*-L type. They are not results from special transfer of rare earth ions, but are from perturobational transfer of electron of ligands by rare earth ions. These complexes have better thermal stability. These weight-lessness by oxidation cleavage is consistant with calculating date.
出处
《北京轻工业学院学报》
1996年第1期26-31,共6页
Journal of Beijing Institute of Light Industry
关键词
钪
钇
镧
钆
间溴苯甲酸
配合物
合成
稀土
scandium
yttrium
lanthanum
gadolinium
3-bromobenzoic acid
complex
synthesis
property
