Thermodynamics of Stepwise Dissociation of Glycyl-L-aspartic and Glycyl-L-glutamic Acids

IF 0.8 4区化学 Q4 CHEMISTRY, PHYSICAL

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI:10.1134/S0036024425700827

S. N. Gridchin, V. M. Nikol’skii

引用次数: 0

Abstract

The thermal effects of the protolytic equilibria of glycyl-L-aspartic and glycyl-L-glutamic acids at 298.15 K and ionic strength values of 0.1, 0.3, 0.5, 1.0, and 1.5 (KNO₃) were determined by direct calorimetry. Using the results of thermochemical and potentiometric studies performed under identical experimental conditions, the standard thermodynamic characteristics (pK°, Δ_disG°, Δ_disH°, Δ_disS°) of the stepwise dissociation reactions of these dipeptides were calculated. The results are compared with the corresponding data on related compounds.

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甘氨酸-天冬氨酸和甘氨酸-谷氨酸逐步解离的热力学

采用直接量热法测定了298.15 K和离子强度分别为0.1、0.3、0.5、1.0和1.5 （KNO3）时甘氨酸- l-天冬氨酸和甘氨酸- l-谷氨酸原解平衡的热效应。利用在相同实验条件下进行的热化学和电位学研究结果，计算了这些二肽的逐步解离反应的标准热力学特性（pK°，ΔdisG°，ΔdisH°，ΔdisS°）。结果与相关化合物的相关数据进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.