Temperature Effect on the Acid-Base Properties of β-Alanine in Aqueous Solution

被引：0

作者：

Samadov, A. S. ^{[1
]}

Khakimov, Dzh. N. ^{[1
]}

Stepnova, A. F. ^{[2
,3
]}

Faizullozoda, E. F. ^{[1
]}

Kuzin, A. V. ^{[2
,4
]}

机构：

[1] Tajik Natl Univ, Dushanbe 734025, Tajikistan

[2] Moscow State Pedag Univ, Moscow 129164, Russia

[3] Peoples Friendship Univ Russia, Moscow 115419, Russia

[4] Bauman Moscow State Tech Univ, Moscow 105005, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2023年 / 97卷 / 04期

关键词：

pH measurements; acid-base properties; beta-alanine; ionization constant; Bjerrum function; temperature effect; COMPLEX-FORMATION; AMINO-ACIDS; CONSTANTS; DERIVATIVES; ION;

D O I：

10.1134/S0036024423040258

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 acid-base properties of beta-alanine (beta-Ala) in aqueous solution were studied by the pH-metric method in the temperature range 278.2-318.2 K and at I = 0.1 M KCl. The ionization constants (pK(i)) of beta-Ala at different temperatures were calculated. The ionization constants were found to change depending on the temperature: an increase in the temperature leads to a decrease in pK(i) for both carboxyl and amine groups, which indicates that the degree of ionization of beta-alanine increased and its acidic properties were enhanced. The thermodynamic characteristics (Delta H-0, Delta S-0, and Delta G) of the corresponding ionization processes were determined by the temperature coefficient method.

引用

页码：658 / 662

页数：5

共 20 条

[1] Potentiometric, thermodynamics and coordination properties for binary andmixed ligand complexes of copper(II) with cephradine antibiotic and some N- and O-bound amino acids (α-alanine and β-alanine) [J].