Enviar artigo por via de e-mail Temperature Effect on the Acid–Base Properties of β-Alanine in Aqueous Solution
- Autores: Samadov A.S.1, Khakimov J.N.1, Stepnova A.F.2,3, Faizullozoda E.F.1, Kuzin A.V.2,4
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Afiliações:
- Tajik National University
- Moscow State Pedagogical University
- Peoples’ Friendship University of Russia
- Bauman Moscow State Technical University
- Edição: Volume 97, Nº 4 (2023)
- Páginas: 512-516
- Seção: ФИЗИЧЕСКАЯ ХИМИЯ РАСТВОРОВ
- ##submission.dateSubmitted##: 27.02.2025
- ##submission.datePublished##: 01.04.2023
- URL: https://gynecology.orscience.ru/0044-4537/article/view/668758
- DOI: https://doi.org/10.31857/S004445372304026X
- EDN: https://elibrary.ru/THAVHG
- ID: 668758
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Resumo
The acid–base properties of β-alanine (β-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 (pKi) of β‑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 pKi for both carboxyl and amine groups, which indicates that the degree of ionization of β-alanine increased and its acidic properties were enhanced. The thermodynamic characteristics (ΔН0, ΔS0, and ΔG) of the corresponding ionization processes were determined by the temperature coefficient method.
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Sobre autores
A. Samadov
Tajik National University
Email: s.s.rasul@mail.ru
734025, Dushanbe, Tajikistan
J. Khakimov
Tajik National University
Email: s.s.rasul@mail.ru
734025, Dushanbe, Tajikistan
A. Stepnova
Moscow State Pedagogical University; Peoples’ Friendship University of Russia
Email: s.s.rasul@mail.ru
129164, Moscow, Russia; 115419, Moscow, Russia
E. Faizullozoda
Tajik National University
Email: s.s.rasul@mail.ru
734025, Dushanbe, Tajikistan
A. Kuzin
Moscow State Pedagogical University; Bauman Moscow State Technical University
Autor responsável pela correspondência
Email: s.s.rasul@mail.ru
129164, Moscow, Russia; 105005, Moscow, Russia
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