Thermodynamics of DL-alalnyl-DL-asparagine dissolution in water-organic mixtures at 298.15 K

被引：0
|
作者：
Badelin, V. G. [1 ]
Smirnov, V. I. [1 ]
机构：
[1] Russian Acad Sci, Krestov Inst Chem Solut, Ivanovo 153045, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2015年 / 89卷 / 10期
关键词：
peptides; enthalpies of dissolution and transfer; water-organic mixtures; enthalpic pair interaction coefficients; SOLVATION ENERGY RELATIONSHIPS; AQUEOUS-SOLUTIONS; AMINO-ACIDS; ENTHALPIES; PEPTIDES; ALPHA; ALANINE; GLYCYL; UREA; BETA;
D O I：
10.1134/S0036024415100039
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：
Enthalpies of dissolution of DL-alpha-alanyl-DL-alpha-asparagine (AlaAsn) in aqueous solutions of acetonitrile, 1,4-dioxane, acetone, and dimethyl sulfoxide are measured via calorimetry at T = 298.15 K and organic solvent concentrations x (2) = 0-0.3 mole fractions. Standard values of the enthalpy of dissolution (Delta(sol) HA degrees), transfer (Delta(tr) HA degrees) of AlaAsn from water into mixed solvent, and enthalpic pair interaction coefficients (h (xy) ) of AlaAsn with molecules of organic solvents are calculated on the basis of experimental data. The effect the composition of a water-organic mixture has on the enthalpy characteristics of AlaAsn is considered. The correlation between the enthalpy of dissolution and the transfer of AlaAsn and the structure and properties of the solvents used is demonstrated.
引用
收藏
页码：1795 / 1799
页数：5
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