机构地区: 中山大学化学与化学工程学院
出 处: 《中国稀土学报》 2003年第1期10-14,共5页
摘 要: 通过电导测量研究了4种钐盐:Sm(CF3SO3)3,Sm(ClO4)3,Sm(NO3)3,和SmCl3在极性非质子溶剂DMF中的电导性质。利用线性拟合方法求得在25℃下Sm(CF3SO3)3和Sm(ClO4)3的极限摩尔电导率分别为274 5和283 2S·cm2·mol-1。用间接方法求得Sm(NO3)3与SmCl3的极限摩尔电导率分别为299 7,289 8S·cm2·mol-1。在25~65℃温度范围内,Sm(CF3SO3)3和Sm(ClO4)3的电导率随温度呈线性变化。Sm(NO3)3,SmCl3的电导行为表现出明显的离子缔合。 Electrical conductivity measurements were made on four samarium salts: Sm(CF3SO3)3, Sm(ClO4)3, Sm(NO3)3 and SmCl3 dissolved in dimethylformamide The limiting molar conductivity of Sm(CF3SO3)3 and Sm(ClO4)3 at 25 ℃ calculated by linear fiting are 2745 and 2832 S·cm2·mol-1 respectively. Those of Sm(NO3)3 and SmCl3 obtained by indirect method are 2997 and 2898 S·cm2·mol-1 respectively The electrical conductivity of Sm(CF3SO3)3 and Sm(ClO4)3 increase linearly in the temperature range(25~65 ℃) Significant ionic association exists in Sm(NO3)3 and SmCl3 solution