Thermodynamic characteristics of acid–base equilibria of glycyl-glycyl-glycine in water–ethanol solutions at 298 K
- Авторы: Pham Thi L.1, Usacheva T.2, Sharnin V.2,3
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Учреждения:
- Institute for Tropical Technology, Vietnam Academy of Science and Technology
- Ivanovo State University of Chemistry and Technology
- Krestov Institute of Solution Chemistry
- Выпуск: Том 90, № 12 (2016)
- Страницы: 2387-2392
- Раздел: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169028
- DOI: https://doi.org/10.1134/S0036024416120098
- ID: 169028
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Аннотация
The enthalpies of the acid dissociation of glycyl-glycyl-glycine zwitterions and triglycinium ions are determined calorimetrically in water–ethanol solvents containing 0.0, 0.10, 0.30, and 0.50 molar fractions of ethanol at ionic strengths of 0.1 (maintained by sodium perchlorate) and Т = 298.15 K. It is found that increasing the ethanol content in the solvent enhances the endothermic effect of triglycinium ion dissociation and reduces the endothermic effect of glycyl-glycyl-glycine dissociation. The results are discussed in terms of the solvation thermodynamics.
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Об авторах
L. Pham Thi
Institute for Tropical Technology, Vietnam Academy of Science and Technology
Автор, ответственный за переписку.
Email: pham_lan@mail.ru
Вьетнам, Hanoi, Hoang Quoc Viet
T. Usacheva
Ivanovo State University of Chemistry and Technology
Email: pham_lan@mail.ru
Россия, Ivanovo, 153000
V. Sharnin
Ivanovo State University of Chemistry and Technology; Krestov Institute of Solution Chemistry
Email: pham_lan@mail.ru
Россия, Ivanovo, 153000; Ivanovo, 153045