Ni(II) complexes of dipeptides: a thermodynamic and spectroscopic study

被引：18

作者：

Conato, C

Ferrari, S

Kozlowski, H

Pulidori, F

Remelli, M

机构：

[1] Univ Ferrara, Dept Chem, I-44100 Ferrara, Italy

[2] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

来源：

POLYHEDRON | 2001年 / 20卷 / 7-8期

关键词：

nickel-dipeptide complexes; glycyl-alanine; glycyl-lysine; histidyl-alanine; histidyl-lysine; beta-alanyl-alanine; beta-alanyl-lysine;

D O I：

10.1016/S0277-5387(01)00713-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex formation equilibria of some dipeptides (glycyl-alanine, glycyl-lysine, P-alanyl-alanine, P-alanyl-lysine, histidyl-alanine and histidyl-lysine) with the Ni(II) ion have been studied in aqueous solution at I = 0.1 mol dm(-3) (KNO3) and T = 25 degreesC. Protonation and complex formation constants have been potentiometrically determined. The structure of the main complex species is discussed on the basis of thermodynamic data obtained by direct calorimetry, CD and absorption spectra. The participation of the amide nitrogen in complex formation is suggested, while no evidence supports the participation of the epsilon -NH2 side group of lysine in coordination. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：615 / 621

页数：7

共 13 条

[1] THERMODYNAMICS OF COMPLEX-FORMATION BETWEEN HYDROGEN, COPPER(II), AND NICKEL(II) IONS AND DIPEPTIDES CONTAINING NONCOORDINATING SUBSTITUENT GROUPS [J].