Thermochemical Study of Acid—Base Reactions in a Glycyl-Tyrosine Aqueous Solution


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Abstract

Thermal effects of the interaction between a glycyl-tyrosine solution and solutions of HNO3 and KOH in different pH ranges at a temperature of 298.15 K and ionic strengths of 0.25, 0.5, and 0.75 (KNO3) are measured via calorimetry. Thermal effects of the stepwise dissociation of the dipeptide are determined. Standard thermodynamic characteristics ΔrH°, ΔrG°, and ΔrS° of acid—base reactions in aqueous solutions of glycyl-tyrosine are calculated. The relationship between the thermodynamic characteristics of dipeptide dissociation and the structure of this compound is examined.

About the authors

A. I. Lytkin

Ivanovo State University of Chemistry and Technology

Author for correspondence.
Email: kdvkonkpd@dsn.ru
Russian Federation, Ivanovo, 153000

V. V. Chernikov

Ivanovo State University of Chemistry and Technology

Email: kdvkonkpd@dsn.ru
Russian Federation, Ivanovo, 153000

O. N. Krutova

Ivanovo State University of Chemistry and Technology

Email: kdvkonkpd@dsn.ru
Russian Federation, Ivanovo, 153000

K. V. Damrina

Ivanovo State University of Chemistry and Technology

Email: kdvkonkpd@dsn.ru
Russian Federation, Ivanovo, 153000

I. A. Skvortsov

Ivanovo State University of Chemistry and Technology

Email: kdvkonkpd@dsn.ru
Russian Federation, Ivanovo, 153000

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