摘要
综合了多种氨基多羧酸同镅、锔、镨、钕的配合物稳定常数，讨论了这类配体对镅－锔及镨－钕的分离因数及，证实了两者之间也存在类似于α－羟基羧酸对这两对离于分离因数的同向升降趋势。据此，选择吡啶－２，６－二羧酸，测定了它与此四离子的配合物稳定常数，获得了以β＿２计的高达１．９９的值。
The stability constants of the complexes of Am￣93+),Cm￣(3+),Pr￣(3+) and Nd￣(3+) with a number ofamino polycarboxylic acids are determined and collected and their various trends are comparedwith α-hydroxy carboxylic acids. It is pointed out that the separation factor of Am-Cmincreases with the separation factor of Pr-Nd. The semiempirical relationship of andis improved from for α-hydroxy carboxylic acids to for both α-hydroxy carboxylic acids and aminopoly carboxylic acids. According to this rela-tionship,2,6-pyridine dicarboxylic acid is selected for the determination of the stability constantsbecause of its high value in literature. The separation factor is as high as 1.99(acounted onβ_2)and the relationship between and thus has been verified further.
出处
《核化学与放射化学》
CSCD
北大核心
1995年第1期13-18,共6页
Journal of Nuclear and Radiochemistry
基金
国家自然科学基金
关键词
分离因数
稳定常数
镅
锔
镨
钕
稀土
eparation factors Stabilitv constant Amino polycarboxylic acids α-hydroxy carboxylic acid Am￣(3+) Cm￣(3+) pr￣(3+) Nd￣(3+)
