The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure
- Autores
- Silva, Oscar Fernando; Hoyos, Maria Rita Micaela; Correa, Nestor Mariano
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- A study was carried out on the hydrolysis of phenyl trifluoroacetate (PTFA) in AOT/n-heptane/water reverse micelles. The results obtained have been interpreted by taking into account the distribution of the PTFA using a kinetic model based on the pseudophase concept and, it is demonstrated that the reaction takes place in the water pool of the reverse micelles. Moreover, it is established that the water molecules involved in the hydration of the interface do not react with PTFA or they do it at much slower rate compared with the water molecules that form the pool. The value of the second order rate constant in the water pool, kw–MI, is of the same order of magnitude as that in pure water but is greater (500 times) than those obtained in water–acetonitrile mixtures with low water content. We performed kinetic solvent isotopic effect (KSIE) and proton inventory experiments (PI) and we concluded that the water is acting as a general-base catalyst and the water sequestered in the water pool is pre-organized favoring the activation process, in contrast to what happened in water–acetonitrile mixtures.
Fil: Silva, Oscar Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Hoyos, Maria Rita Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Fil: Correa, Nestor Mariano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales; Argentina - Materia
-
Reverse Micelles
Aot
Catalysis - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/47449
Ver los metadatos del registro completo
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The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structureSilva, Oscar FernandoHoyos, Maria Rita MicaelaCorrea, Nestor MarianoReverse MicellesAotCatalysishttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A study was carried out on the hydrolysis of phenyl trifluoroacetate (PTFA) in AOT/n-heptane/water reverse micelles. The results obtained have been interpreted by taking into account the distribution of the PTFA using a kinetic model based on the pseudophase concept and, it is demonstrated that the reaction takes place in the water pool of the reverse micelles. Moreover, it is established that the water molecules involved in the hydration of the interface do not react with PTFA or they do it at much slower rate compared with the water molecules that form the pool. The value of the second order rate constant in the water pool, kw–MI, is of the same order of magnitude as that in pure water but is greater (500 times) than those obtained in water–acetonitrile mixtures with low water content. We performed kinetic solvent isotopic effect (KSIE) and proton inventory experiments (PI) and we concluded that the water is acting as a general-base catalyst and the water sequestered in the water pool is pre-organized favoring the activation process, in contrast to what happened in water–acetonitrile mixtures.Fil: Silva, Oscar Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Hoyos, Maria Rita Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaFil: Correa, Nestor Mariano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales; ArgentinaRoyal Society of Chemistry2015-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/47449Silva, Oscar Fernando; Hoyos, Maria Rita Micaela; Correa, Nestor Mariano; The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure; Royal Society of Chemistry; RSC Advances; 5; 44; 4-2015; 34878-348842046-2069CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA03532E#info:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra03532einfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:49:44Zoai:ri.conicet.gov.ar:11336/47449instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:49:45.179CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
title |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
spellingShingle |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure Silva, Oscar Fernando Reverse Micelles Aot Catalysis |
title_short |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
title_full |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
title_fullStr |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
title_full_unstemmed |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
title_sort |
The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure |
dc.creator.none.fl_str_mv |
Silva, Oscar Fernando Hoyos, Maria Rita Micaela Correa, Nestor Mariano |
author |
Silva, Oscar Fernando |
author_facet |
Silva, Oscar Fernando Hoyos, Maria Rita Micaela Correa, Nestor Mariano |
author_role |
author |
author2 |
Hoyos, Maria Rita Micaela Correa, Nestor Mariano |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Reverse Micelles Aot Catalysis |
topic |
Reverse Micelles Aot Catalysis |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
A study was carried out on the hydrolysis of phenyl trifluoroacetate (PTFA) in AOT/n-heptane/water reverse micelles. The results obtained have been interpreted by taking into account the distribution of the PTFA using a kinetic model based on the pseudophase concept and, it is demonstrated that the reaction takes place in the water pool of the reverse micelles. Moreover, it is established that the water molecules involved in the hydration of the interface do not react with PTFA or they do it at much slower rate compared with the water molecules that form the pool. The value of the second order rate constant in the water pool, kw–MI, is of the same order of magnitude as that in pure water but is greater (500 times) than those obtained in water–acetonitrile mixtures with low water content. We performed kinetic solvent isotopic effect (KSIE) and proton inventory experiments (PI) and we concluded that the water is acting as a general-base catalyst and the water sequestered in the water pool is pre-organized favoring the activation process, in contrast to what happened in water–acetonitrile mixtures. Fil: Silva, Oscar Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina Fil: Hoyos, Maria Rita Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina Fil: Correa, Nestor Mariano. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales; Argentina |
description |
A study was carried out on the hydrolysis of phenyl trifluoroacetate (PTFA) in AOT/n-heptane/water reverse micelles. The results obtained have been interpreted by taking into account the distribution of the PTFA using a kinetic model based on the pseudophase concept and, it is demonstrated that the reaction takes place in the water pool of the reverse micelles. Moreover, it is established that the water molecules involved in the hydration of the interface do not react with PTFA or they do it at much slower rate compared with the water molecules that form the pool. The value of the second order rate constant in the water pool, kw–MI, is of the same order of magnitude as that in pure water but is greater (500 times) than those obtained in water–acetonitrile mixtures with low water content. We performed kinetic solvent isotopic effect (KSIE) and proton inventory experiments (PI) and we concluded that the water is acting as a general-base catalyst and the water sequestered in the water pool is pre-organized favoring the activation process, in contrast to what happened in water–acetonitrile mixtures. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-04 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/47449 Silva, Oscar Fernando; Hoyos, Maria Rita Micaela; Correa, Nestor Mariano; The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure; Royal Society of Chemistry; RSC Advances; 5; 44; 4-2015; 34878-34884 2046-2069 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/47449 |
identifier_str_mv |
Silva, Oscar Fernando; Hoyos, Maria Rita Micaela; Correa, Nestor Mariano; The hydrolysis of phenyl trifluoroacetate in AOT/n-heptane RMs as a sensor of the encapsulated water structure; Royal Society of Chemistry; RSC Advances; 5; 44; 4-2015; 34878-34884 2046-2069 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA03532E# info:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra03532e |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Royal Society of Chemistry |
publisher.none.fl_str_mv |
Royal Society of Chemistry |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613537444397056 |
score |
13.070432 |