THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS
The literature data on the thermodynamics of ethanolamines onium cations dissociation have been systematized and generalized. The correlation between these cations dissociation thermodynamic functions (DH and DS) and physicochemical properties (Tmp., Tbp, Pp, lgPow et al.) has been revealed. There w...
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| Format: | Article |
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Odessa I. I. Mechnikov National University
2017-03-01
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| Series: | Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ |
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| Online Access: | http://heraldchem.onu.edu.ua/article/view/94707 |
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| author | R. E. Khoma А. А.-А. Еnnаn A. N. Chebotaryov S. V. Vodzinskii A. O. Mayans’kaya |
| author_facet | R. E. Khoma А. А.-А. Еnnаn A. N. Chebotaryov S. V. Vodzinskii A. O. Mayans’kaya |
| author_sort | R. E. Khoma |
| collection | DOAJ |
| description | The literature data on the thermodynamics of ethanolamines onium cations dissociation have been systematized and generalized. The correlation between these cations dissociation thermodynamic functions (DH and DS) and physicochemical properties (Tmp., Tbp, Pp, lgPow et al.) has been revealed. There was a correlation between lipophilicity determined experimentally and calculated by QSAR. For monoethanolammonium, diethanolammonium, and their N-methyl and N-ethyl derivatives it was found dissociation thermodynamic functions to depend on bases lgPow. Acid-base dissociation of TRIS and triethanolamine onium cations does not correspond to said relationship because TRIS (primary amine), TEA (tertiary amine) act differently on aqueous solutions of SO2. TEA, unlike MEA, DEA and MMEA, has a salting out effect towards sulfur dioxide because of competing hydration that promotes sulfite «onium» salts hydrolysis. TRIS promotes S(IV) → S(VI) sulphooxidation, in contrast to another ethanolamines. Enthalpy–enthropy compensation with isothermodynamic temperature 303 K has been recorded. The revealed correlations may be useful in developing of procedures for air sanitary cleaning from acidic gases; chemisorbents immobilized for gas and ion exchange chromatography; potentiometric methods for fluorocomplex acids determinations. The use of monoethanolamine is most promising to obtain chemisorbents because the thermodynamic functions of its onium cation acid-base dissociation are least dependent on temperature compared to other etanolammonium cations. |
| first_indexed | 2024-04-12T19:56:19Z |
| format | Article |
| id | doaj.art-2a5573b6227b447699a17c0250b77ee6 |
| institution | Directory Open Access Journal |
| issn | 2304-0947 2414-5963 |
| language | English |
| last_indexed | 2024-04-12T19:56:19Z |
| publishDate | 2017-03-01 |
| publisher | Odessa I. I. Mechnikov National University |
| record_format | Article |
| series | Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ |
| spelling | doaj.art-2a5573b6227b447699a17c0250b77ee62022-12-22T03:18:39ZengOdessa I. I. Mechnikov National UniversityVìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ2304-09472414-59632017-03-01221(61)61910.18524/2304-0947.2017.1(61).9470794707THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONSR. E. Khoma0А. А.-А. Еnnаn1A. N. Chebotaryov2S. V. Vodzinskii3A. O. Mayans’kaya4Одеський національний університет імені І.І. Мечникова; Фізико-хімічний інститут захисту навколишнього середовища і людиниФізико-хімічний інститут захисту навколишнього середовища і людиниОдеський національний університет імені І.І. МечниковаОдеський національний університет імені І.І. МечниковаОдеський національний університет імені І.І. МечниковаThe literature data on the thermodynamics of ethanolamines onium cations dissociation have been systematized and generalized. The correlation between these cations dissociation thermodynamic functions (DH and DS) and physicochemical properties (Tmp., Tbp, Pp, lgPow et al.) has been revealed. There was a correlation between lipophilicity determined experimentally and calculated by QSAR. For monoethanolammonium, diethanolammonium, and their N-methyl and N-ethyl derivatives it was found dissociation thermodynamic functions to depend on bases lgPow. Acid-base dissociation of TRIS and triethanolamine onium cations does not correspond to said relationship because TRIS (primary amine), TEA (tertiary amine) act differently on aqueous solutions of SO2. TEA, unlike MEA, DEA and MMEA, has a salting out effect towards sulfur dioxide because of competing hydration that promotes sulfite «onium» salts hydrolysis. TRIS promotes S(IV) → S(VI) sulphooxidation, in contrast to another ethanolamines. Enthalpy–enthropy compensation with isothermodynamic temperature 303 K has been recorded. The revealed correlations may be useful in developing of procedures for air sanitary cleaning from acidic gases; chemisorbents immobilized for gas and ion exchange chromatography; potentiometric methods for fluorocomplex acids determinations. The use of monoethanolamine is most promising to obtain chemisorbents because the thermodynamic functions of its onium cation acid-base dissociation are least dependent on temperature compared to other etanolammonium cations.http://heraldchem.onu.edu.ua/article/view/94707етаноламіниводні розчинитермодинаміка дисоціаціїентальпійно-ентропійна компенсація |
| spellingShingle | R. E. Khoma А. А.-А. Еnnаn A. N. Chebotaryov S. V. Vodzinskii A. O. Mayans’kaya THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ етаноламіни водні розчини термодинаміка дисоціації ентальпійно-ентропійна компенсація |
| title | THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS |
| title_full | THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS |
| title_fullStr | THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS |
| title_full_unstemmed | THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS |
| title_short | THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS |
| title_sort | thermodynamics of ethanolammonium cationes dissociation in aqueous solutions |
| topic | етаноламіни водні розчини термодинаміка дисоціації ентальпійно-ентропійна компенсація |
| url | http://heraldchem.onu.edu.ua/article/view/94707 |
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