کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5408619 | 1506538 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solvation behavior of glycine and glycyl dipeptide in aqueous 1-butyl-3-methylimidazolium bromide ionic liquid solutions at different temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Densities and speeds of sound of glycine and glycyl dipeptide (glycylglycine) in aqueous 1-butyl-3 methylimidazolium bromide, [C4mim][Br] solutions have been measured at T = (288.15, 298.15 and 308.15) K. From the experimental data of density and speed of sound, the apparent molar volumes (VÏ), apparent molar volumes at infinite dilution (VÏ0), apparent molar isentropic compression (KÏ , s) and apparent molar isentropic compression at infinite dilution (KÏ , S0) have also been determined. Further, the partial molar volumes of transfer (ÎtrVÏ0) and partial molar isentropic compression of transfer (ÎtrKÏ , S0) of glycine and glycyl dipeptide from water to aqueous [C4mim][Br] solutions were calculated to enlighten the interactions such as solute-solute, solute-solvent and solvent-solvent present in these solutions. The apparent molar expansivity (EÏ0), Hepler's constant values âEÏ0âTP,thermal expansion coefficient (α) and hydration number (nH) have been evaluated to assist the interpretations earned from the volumetric and acoustic analysis. The Hepler's constant values were found negative for glycine and glycyl dipeptide at all concentrations of ionic liquid except at lower concentration with glycyl dipeptide. The negative sign indicates the co-solutes act a structure breaker.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 233, May 2017, Pages 38-44
Journal: Journal of Molecular Liquids - Volume 233, May 2017, Pages 38-44
نویسندگان
Rekha Gaba, Amalendu Pal, Dinkar Sharma, Jaspreet Kaur,