Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties
Surface pressure-area isotherms of pure 2-methoxy-6-[(n-octadecylimino)methyl]phenol (MODIMP) and its mixture with stearic acid are reported. While the monolayer of pure MODIMP is unstable, mixing it with stearic acid stabilizes and condenses it. As the proportion of stearic acid in the solution be...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Mato Grosso do Sul
2018-04-01
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| Series: | Orbital: The Electronic Journal of Chemistry |
| Subjects: | |
| Online Access: | https://periodicos.ufms.br/index.php/orbital/article/view/16357 |
| _version_ | 1828057776895557632 |
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| author | Siji Sudheesh Jamil Ahmad Girija Shankar Singh |
| author_facet | Siji Sudheesh Jamil Ahmad Girija Shankar Singh |
| author_sort | Siji Sudheesh |
| collection | DOAJ |
| description | Surface pressure-area isotherms of pure 2-methoxy-6-[(n-octadecylimino)methyl]phenol (MODIMP) and its mixture with stearic acid are reported. While the monolayer of pure MODIMP is unstable, mixing it with stearic acid stabilizes and condenses it. As the proportion of stearic acid in the solution being spread increases, the monolayer gets progressively more condensed and the surface pressure-area isotherm shows a decreased compressibility. Values of excess area per molecule of the mixed monolayer compared to the individual components give an indication about the possible interactions between the molecules of the two components and their orientation at the interface. At lower surface pressures, interactions between the molecules of different components are stronger than those in the pure monolayer, while opposite is the case at higher surface pressures.
DOI: http://dx.doi.org/10.17807/orbital.v10i2.1078
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| first_indexed | 2024-04-10T21:17:37Z |
| format | Article |
| id | doaj.art-8eff10fa902647a286c359e779e519ca |
| institution | Directory Open Access Journal |
| issn | 1984-6428 |
| language | English |
| last_indexed | 2024-04-10T21:17:37Z |
| publishDate | 2018-04-01 |
| publisher | Universidade Federal de Mato Grosso do Sul |
| record_format | Article |
| series | Orbital: The Electronic Journal of Chemistry |
| spelling | doaj.art-8eff10fa902647a286c359e779e519ca2023-01-20T10:56:17ZengUniversidade Federal de Mato Grosso do SulOrbital: The Electronic Journal of Chemistry1984-64282018-04-01102Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic PropertiesSiji Sudheesh0Jamil Ahmad1Girija Shankar Singh2University of BotswanaUniversity of BotswanaUniversity of BotswanaSurface pressure-area isotherms of pure 2-methoxy-6-[(n-octadecylimino)methyl]phenol (MODIMP) and its mixture with stearic acid are reported. While the monolayer of pure MODIMP is unstable, mixing it with stearic acid stabilizes and condenses it. As the proportion of stearic acid in the solution being spread increases, the monolayer gets progressively more condensed and the surface pressure-area isotherm shows a decreased compressibility. Values of excess area per molecule of the mixed monolayer compared to the individual components give an indication about the possible interactions between the molecules of the two components and their orientation at the interface. At lower surface pressures, interactions between the molecules of different components are stronger than those in the pure monolayer, while opposite is the case at higher surface pressures. DOI: http://dx.doi.org/10.17807/orbital.v10i2.1078 https://periodicos.ufms.br/index.php/orbital/article/view/16357interactions in monolayersLangmuir films2-methoxy-6-[(octadecylimino)methyl]phenolSchiff’s bases |
| spellingShingle | Siji Sudheesh Jamil Ahmad Girija Shankar Singh Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties Orbital: The Electronic Journal of Chemistry interactions in monolayers Langmuir films 2-methoxy-6-[(octadecylimino)methyl]phenol Schiff’s bases |
| title | Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties |
| title_full | Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties |
| title_fullStr | Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties |
| title_full_unstemmed | Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties |
| title_short | Mixed Monolayer of Amphiphilic Schiff Base of ortho-Vaniline and Stearic Acid: Isotherms and Thermodynamic Properties |
| title_sort | mixed monolayer of amphiphilic schiff base of ortho vaniline and stearic acid isotherms and thermodynamic properties |
| topic | interactions in monolayers Langmuir films 2-methoxy-6-[(octadecylimino)methyl]phenol Schiff’s bases |
| url | https://periodicos.ufms.br/index.php/orbital/article/view/16357 |
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