Study of complex formation in the “β cyclodextrin - p aminobenzoic acid” system
Protolytic transitions of p‑aminobenzoic acid from molecular to anionic (or protonated) form were studied by UV spectroscopy. The change of ionization constants values as a result of p‑aminobenzoic acid localization in the hydrophobic cavity of β‑cyclodextrin was demonstrated. It was fo...
Збережено в:
| Дата: | 2009 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | Російська |
| Опубліковано: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2009
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| Онлайн доступ: | https://surfacezbir.com.ua/index.php/surface/article/view/329 |
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| Назва журналу: | Surface |
| Завантажити файл: |  |
Репозитарії
Surface| Резюме: | Protolytic transitions of p‑aminobenzoic acid from molecular to anionic (or protonated) form were studied by UV spectroscopy. The change of ionization constants values as a result of p‑aminobenzoic acid localization in the hydrophobic cavity of β‑cyclodextrin was demonstrated. It was found that p‑amonobenzoic acid forms supramolecular structures with stoichiometric composition 1 : 1. The stability constants of “β‑cyclodextrin - p‑aminobenzoic acid” inclusion complex at 289, 292, 313 K and thermodynamic parameters involved in the complex formation (∆G°, ∆H°, ∆S°) were calculated. |
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