Enthalpies of solution of glycylglycine in water-organic solvent media at 298.15 K

被引：12

作者：

Smirnov, Valeriy I. ^{[1
]}

Badelin, Valentin G. ^{[1
]}

机构：

[1] Russian Acad Sci, Lab Thermodynam Solut Nonelectrolytes & Biol Act, Inst Solut Chem, Ivanovo 153045, Russia

来源：

THERMOCHIMICA ACTA | 2010年 / 501卷 / 1-2期

关键词：

Peptides; Enthalpies of solution and transfer; Mixtures of water with organic solvents; SOLVATION ENERGY RELATIONSHIPS; AMINO-ACIDS; ALPHA-ALANINE; MIXTURES; GLYCINE; SOLUBILITY; PEPTIDES; ETHANOL; AMIDES; SYSTEM;

D O I：

10.1016/j.tca.2010.01.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The enthalpies of solution of glycylglycine in aqueous solution of 1,4-dioxane, acetone, formamide, N-methylformamide and N,N-dimethylformamide, with the co-solvent content up to 0.4 mole fractions, have been measured calorimetrically at T = 298.15 K. The results obtained were used to calculate the standard enthalpies of solution (Delta H-sol degrees) and transfer (Delta H-tr degrees) of the glycylglycine from water into the mixtures as well as the enthalpy coefficients of pair-wise interaction h(xy) of the solute with the organic co-solvents in aqueous media. The h(xy) values were correlated with the properties of organic solvents using the Kamlet-Taft equation. The effect of the structure properties of the mixed solvent on the specified enthalpy characteristics of glycylglycine is discussed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：55 / 58

页数：4

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