Ternary copper(II) complexes of novel polyamino-polyamide ligands and amino-acids

被引：0

作者：

Guo, YH ^{[1
]}

Ge, QC ^{[1
]}

Li, FH ^{[1
]}

Lin, HK ^{[1
]}

Zhu, SR ^{[1
]}

机构：

[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China

来源：

CHINESE JOURNAL OF INORGANIC CHEMISTRY | 2004年 / 20卷 / 04期

关键词：

polyamino-polyamido ligands; alpha-amino acids; copper(II); ternary complexes;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three polyamino-polyamide ligands 1,12-bis((alpha-hydroxylmethyl)phenyl)-2,5,8,11-tetraazadodecane-1,12-dione (L,), 1,13-bis((alpha-hydroxylmethyl)phenyl)-2,5,9,12-tetraazatridecane-1,13- dione (L-2), 1,15-bis ((alpha-hydroxylmethyl) phenyl)-2,5,8,11,14-pentaazapentadecane-1,15-dione (L-3) have been synthesized. The stability constants of complexation of Cu(II) with these three ligands in dioxane/water (V/V, 15/85) mixed solvent have been determined by pH titrations at 5.0 degreesC, 15.0 degreesC, 25.0 degreesC and 35.0 degreesC respectively. The thermodynamic parameters DeltaH(m)(circle minus) and DeltaS(m)(circle minus) were obtained. The result shows that both the protonation of the ligands and the formation of metal complexes are controlled by the change of enthalpy. In addition, the stability constants of ternary complexes of Cu(II), L and alpha-amino-acid (AA) have been determined at 25.0 degreesC, where L = L-1 L-2 and L-3, AA = L-proline (Pro), L-isoleucine (Ile), L-valine (Val), glycine (Gly), L-serine (Ser), respectively. It is observed that linear free energy relationship (LFER) exists in the ternary systems.

引用

页码：381 / 388

页数：8

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