Enthalpies of β-Alanine Dissolution in Some Water plus Organic Mixtures at 298.15 K

被引：13

作者：

Smirnov, Valeriy I. ^{[1
]}

Badelin, Valentin G. ^{[1
]}

机构：

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

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2014年 / 59卷 / 06期

关键词：

DL-ALPHA-ALANINE; SOLVATOCHROMIC COMPARISON METHOD; AQUEOUS-SOLUTIONS; AMINO-ACIDS; THERMODYNAMIC PROPERTIES; SOLVENT MIXTURES; PI-STAR; ETHANOL; UREA; 25-DEGREES-C;

D O I：

10.1021/je400966q

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The enthalpies of solution (Delta H-sol(m)) of beta-alanine in aqueous solutions of acetonitrile (AN), 1,4-dioxane (1,4-DO), acetone (AC), formamide (FA), N-methylformamide (MFA), N,N-dimethylformamide (DMFA), N,N-dimethylacetamide (DMA), and dimethyl sulfoxide (DMSO) have been determined by calorimetric method as a function of organic solvent concentration at 298.15 K. Enthalpies of transfer (Delta H-tr degrees) of beta-alanine from water to aqueous organic mixtures as well as the enthalpy coefficients of pairwise interaction (h(xy)) were calculated from these data. The interrelation between enthalpy characteristics of beta-alanine dissolution (transfer) and the composition of water organic solvent binary mixtures has been ascertained. By means of a modified Kamlet-Taft equation the contributions of different physicochemical properties of organic cosolvents to the energy of beta-alanine-cosolvent intermolecular interactions have been estimated quantitatively.

引用

页码：1774 / 1780

页数：7

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