三价镅－锔与镨－钕分离因数的关联及吡啶－2，6－二羧酸的配合物稳定常数的测定  

RELATIONSHIP BETWEEN SEPARATION FACTORS αANDαAND THE STABILITY CONSTANTS OF COMPLEXES WITH 2,6-PYRIDINE DICARBOXYLC ACID

作　　者：杨裕生[1] 李晓忠[1] 丁玉珍[1] 卢加春[1] 

机构地区：[1]西北核技术研究所

出　　处：《核化学与放射化学》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

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.

关 键 词：分离因数 稳定常数 镅 锔 镨 钕 稀土 

分 类 号：O614.33[理学—无机化学] O626.321[理学—化学]