稀土离子—1，10—菲罗啉桥联多胺二元配合物的稳定性研究  

Studies on the Stability of Rare Earth Ion - N, N' - dialkyl - 1,10 - phenanthroline - 2,9 - dimethanamine Binary Complexes

作　　者：汪中明[1] 周志芬[1] 林华宽[1] 徐猛[1] 刘天府[1] 朱守荣[1] 孙宏伟[1] 陈荣悌[1] 

机构地区：[1]南开大学化学系,

出　　处：《化学学报》2001年第5期701-706,共6页Acta Chimica Sinica

基　　金：国家自然科学基金，天津市自然科学基金

摘　　要：在(25±0.1)℃,I=0.1 mol@dm-3NaClO4的条件下,用pH电位滴定法测定了配体N,N'-二取代基-1,10-菲罗啉-2,9-二甲胺(L1～L6,取代基分别对应于甲基、乙基、正丙基、正丁基、异丙基、叔丁基)在水溶液中分别与稀土离子Ln[Ln=La(Ⅲ),Ce(Ⅲ),Pr(Ⅲ),Nd(Ⅲ),Sm(Ⅲ),Eu(Ⅲ),Gd(Ⅲ),Tb(Ⅲ),Dy(Ⅲ),Ho(Ⅲ)]的二元配合物的稳定常数.提出了配合物在溶液中的可能结构.对金属离子和取代基的大小对配合物稳定性的影响进行了详细的讨论.运用线性回归,对有放射性的Pm(Ⅲ)与相应配体的二元配合物的稳定常数进行了推测.The stability constants of Ln - L [Ln = La( III), Ce(III), Pr( III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III) , Dy(III), Ho(III), L = N, N' - dialkyl - 1,10 - phenanthroline - 2,9 - dimethanamine, in which alkyl group denotes -CH3, -CH2CH3, -(CH2)(2)CH3, -(CH2)(3)CH3, -CH(CH3)(2), -C(CH3)(3) ] binary complexes have been determined by pH potentiometric titration method at (25 +/- 0.1)degreesC, I= 0. 1 mol . dm(-3) NaClO4. The probable structures of the corresponding complexes were proposed. The influence of the metal ions and the substituents on the stability of binary complexes is reported in detail. The stability difference between the complexes of rare earth ion and the corresponding complexes of Cu(III) ion is also discussed. The stability constants of the corresponding binary complex of radioactive Pm(III) ion are estimated by linear regression.

关 键 词：1 10-菲罗啉 桥联多胺衍生物 稀土离子 稳定性 二元配合物 稳定常数 

分 类 号：O614.33[理学—无机化学]