Differences in physico-chemical properties and behavior of urea and 1,1,3,3-tetramethylurea in the mixture of water with N,N-dimethylformamide at temperature range T = (293.15-308.15) K

被引：3

作者：

Jozwiak, Malgorzata ^{[1
]}

Tyczynska, Magdalena ^{[1
]}

Bald, Adam ^{[1
]}

机构：

[1] Univ Lodz, Dept Phys Chem, Pomorska 165, PL-90236 Lodz, Poland

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2017年 / 247卷

关键词：

N; N-dimethylformamide plus water mixture; Tetramethylurea; Density; Apparent molar volume; Partial molar volume; Excess partial molar volume; TRIMETHYLAMINE-N-OXIDE; APPARENT MOLAL VOLUME; AQUEOUS-SOLUTION; PROTEIN DENATURATION; SOLVENT INTERACTIONS; SUBSTITUTED UREAS; HEAT-CAPACITIES; BINARY-MIXTURES; AMIDES; DERIVATIVES;

D O I：

10.1016/j.molliq.2017.09.096

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：

The apparent molar volumes of tetramethylurea (TMU) in the mixture of N,N-dimethylformamide (DMF) and water (W) have been determined within the temperature range: T = (293.15-308.15) K from density measurements. Based on Redlich-Meyer equation partial molar volumes and by coefficient describing the character of interactions were calculated. The results obtained for TMU showing hydrophobic properties have been compared with the corresponding results for urea that shows hydrophilic properties. This allowed us to analyze the solvation process of the investigated substances as well as to show an opposite behavior of urea in relation to TMU in the mixture DMF+W, particularly in the area of high water content. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：182 / 187

页数：6

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