Thermodynamic characteristics of complex formation by Ni2+ ions and glycylglycine in aqueous solutions of KNO3 at 288-308 K

被引：1
|
作者：
Kochergina, L. A. [1 ]
Emel'yanov, A. V. [1 ]
机构：
[1] Ivanovo State Univ Chem & Technol, Ivanovo 153460, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2014年 / 88卷 / 10期
关键词：
thermodynamics; peptide; solutions; calorimeter; complexes; GLYCINE PEPTIDES; METAL COMPLEXES; ELECTROLYTES; ASSOCIATION; NICKEL(II); SUBSTANCES; DIGLYCINE; HEAT; ACID;
D O I：
10.1134/S0036024414100215
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Heat effects of the interaction between glycylglycine and nickel (II) nitrate solutions are measured by direct calorimetry at different pH values and metal: ligand ratios in the temperature range of 288.15 to 308.15 K. KNO3 is used as the background electrolyte. The heat effects of diluting the nickel nitrate solution in solutions of the background electrolyte are determined in order to make the appropriate corrections. The standard thermodynamic characteristics of complex formation by peptides and nickel (II) ions in aqueous solution are calculated. Standard enthalpies of the formation of complex particles NiPep(+), NiPep(2), and NiPep (3) (-) are determined for the first time.
引用
收藏
页码：1664 / 1669
页数：6
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