Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectros...

Autores
Dib, Nahir; Falcone, Ruben Dario; Acuña, Angel; García-Río, Luis
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present study investigated how the presence of butylmethylimidazolium cation (bmim+) alters the interfacial properties of reverse micelles (RMs) created with the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT), in comparison to sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) RMs, employing dynamic light scattering (DLS) and 1H NMR techniques. Moreover, through the hydrolysis reaction of bis(4-nitrophenyl)carbonate inside both RMs as reaction probe, interfacial properties changes were explored in more detail. The kinetic solvent isotope effect was also analyzed. Micellar systems were formed using n-heptane as external nonpolar solvent and water as the polar component. According to the DLS studies, water is encapsulated inside the organized media; however, a different tendency is observed depending on the cationic component of the surfactant. For Na-AOT system, the results suggest that the micellar shapes are probably spherical, while in the case of bmim-AOT, a transition from ellipsoidal to spherical micelles could be occurring when water is added. 1H NMR data show that water is structured differently when Na+ cation is replaced by bmim+ in bmim-AOT RMs, the interaction of water with the surfactant is weaker and the water hydrogen-bonding network is less disturbed than in Na-AOT RMs. Kinetic studies reveal that the hydrolysis reaction in bmim-AOT RMs was much more favorable in comparison to Na-AOT RMs. In addition, when water content decreases in bmim-AOT RMs, the hydrolysis reaction rate increases and the solvent isotope effect remains constant, while for Na-AOT solutions, both the reaction rate and the solvent isotope effect decrease. Our results indicate that bmim+ cation would be located in the surfactant layer in such a way the negative charge density in the interface is less than that in Na-AOT RMs, and the reaction is more favorable. Additionally, as 1H NMR studies reveal, the interfacial water molecules would be more available in bmim-AOT RMs to participate in the nucleophilic attack. Therefore, the present study evidences how the replacement of Na+ counterion by bmim+ alters the composition of the interface of AOT RMs.
Fil: Dib, Nahir. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; Argentina
Fil: Falcone, Ruben Dario. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; Argentina
Fil: Acuña, Angel. Universidad de Santiago de Compostela; España
Fil: García-Río, Luis. Universidad de Santiago de Compostela; España
Materia
REVERSE MICELLES
BMIM-AOT
IONIC LIQUIDS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/120734
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probeDib, NahirFalcone, Ruben DarioAcuña, AngelGarcía-Río, LuisREVERSE MICELLESBMIM-AOTIONIC LIQUIDShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The present study investigated how the presence of butylmethylimidazolium cation (bmim+) alters the interfacial properties of reverse micelles (RMs) created with the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT), in comparison to sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) RMs, employing dynamic light scattering (DLS) and 1H NMR techniques. Moreover, through the hydrolysis reaction of bis(4-nitrophenyl)carbonate inside both RMs as reaction probe, interfacial properties changes were explored in more detail. The kinetic solvent isotope effect was also analyzed. Micellar systems were formed using n-heptane as external nonpolar solvent and water as the polar component. According to the DLS studies, water is encapsulated inside the organized media; however, a different tendency is observed depending on the cationic component of the surfactant. For Na-AOT system, the results suggest that the micellar shapes are probably spherical, while in the case of bmim-AOT, a transition from ellipsoidal to spherical micelles could be occurring when water is added. 1H NMR data show that water is structured differently when Na+ cation is replaced by bmim+ in bmim-AOT RMs, the interaction of water with the surfactant is weaker and the water hydrogen-bonding network is less disturbed than in Na-AOT RMs. Kinetic studies reveal that the hydrolysis reaction in bmim-AOT RMs was much more favorable in comparison to Na-AOT RMs. In addition, when water content decreases in bmim-AOT RMs, the hydrolysis reaction rate increases and the solvent isotope effect remains constant, while for Na-AOT solutions, both the reaction rate and the solvent isotope effect decrease. Our results indicate that bmim+ cation would be located in the surfactant layer in such a way the negative charge density in the interface is less than that in Na-AOT RMs, and the reaction is more favorable. Additionally, as 1H NMR studies reveal, the interfacial water molecules would be more available in bmim-AOT RMs to participate in the nucleophilic attack. Therefore, the present study evidences how the replacement of Na+ counterion by bmim+ alters the composition of the interface of AOT RMs.Fil: Dib, Nahir. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; ArgentinaFil: Falcone, Ruben Dario. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; ArgentinaFil: Acuña, Angel. Universidad de Santiago de Compostela; EspañaFil: García-Río, Luis. Universidad de Santiago de Compostela; EspañaAmerican Chemical Society2019-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/120734Dib, Nahir; Falcone, Ruben Dario; Acuña, Angel; García-Río, Luis; Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe; American Chemical Society; Langmuir; 35; 39; 10-2019; 12744-127530743-74631520-5827CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/acs.langmuir.9b01083info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/acs.langmuir.9b01083info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:09:23Zoai:ri.conicet.gov.ar:11336/120734instacron: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:34982025-09-03 10:09:24.068CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
title Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
spellingShingle Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
Dib, Nahir
REVERSE MICELLES
BMIM-AOT
IONIC LIQUIDS
title_short Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
title_full Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
title_fullStr Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
title_full_unstemmed Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
title_sort Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe
dc.creator.none.fl_str_mv Dib, Nahir
Falcone, Ruben Dario
Acuña, Angel
García-Río, Luis
author Dib, Nahir
author_facet Dib, Nahir
Falcone, Ruben Dario
Acuña, Angel
García-Río, Luis
author_role author
author2 Falcone, Ruben Dario
Acuña, Angel
García-Río, Luis
author2_role author
author
author
dc.subject.none.fl_str_mv REVERSE MICELLES
BMIM-AOT
IONIC LIQUIDS
topic REVERSE MICELLES
BMIM-AOT
IONIC LIQUIDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The present study investigated how the presence of butylmethylimidazolium cation (bmim+) alters the interfacial properties of reverse micelles (RMs) created with the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT), in comparison to sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) RMs, employing dynamic light scattering (DLS) and 1H NMR techniques. Moreover, through the hydrolysis reaction of bis(4-nitrophenyl)carbonate inside both RMs as reaction probe, interfacial properties changes were explored in more detail. The kinetic solvent isotope effect was also analyzed. Micellar systems were formed using n-heptane as external nonpolar solvent and water as the polar component. According to the DLS studies, water is encapsulated inside the organized media; however, a different tendency is observed depending on the cationic component of the surfactant. For Na-AOT system, the results suggest that the micellar shapes are probably spherical, while in the case of bmim-AOT, a transition from ellipsoidal to spherical micelles could be occurring when water is added. 1H NMR data show that water is structured differently when Na+ cation is replaced by bmim+ in bmim-AOT RMs, the interaction of water with the surfactant is weaker and the water hydrogen-bonding network is less disturbed than in Na-AOT RMs. Kinetic studies reveal that the hydrolysis reaction in bmim-AOT RMs was much more favorable in comparison to Na-AOT RMs. In addition, when water content decreases in bmim-AOT RMs, the hydrolysis reaction rate increases and the solvent isotope effect remains constant, while for Na-AOT solutions, both the reaction rate and the solvent isotope effect decrease. Our results indicate that bmim+ cation would be located in the surfactant layer in such a way the negative charge density in the interface is less than that in Na-AOT RMs, and the reaction is more favorable. Additionally, as 1H NMR studies reveal, the interfacial water molecules would be more available in bmim-AOT RMs to participate in the nucleophilic attack. Therefore, the present study evidences how the replacement of Na+ counterion by bmim+ alters the composition of the interface of AOT RMs.
Fil: Dib, Nahir. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; Argentina
Fil: Falcone, Ruben Dario. Universidad Nacional de Río Cuarto. Instituto para el Desarrollo Agroindustrial y de la Salud. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto para el Desarrollo Agroindustrial y de la Salud; Argentina
Fil: Acuña, Angel. Universidad de Santiago de Compostela; España
Fil: García-Río, Luis. Universidad de Santiago de Compostela; España
description The present study investigated how the presence of butylmethylimidazolium cation (bmim+) alters the interfacial properties of reverse micelles (RMs) created with the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT), in comparison to sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) RMs, employing dynamic light scattering (DLS) and 1H NMR techniques. Moreover, through the hydrolysis reaction of bis(4-nitrophenyl)carbonate inside both RMs as reaction probe, interfacial properties changes were explored in more detail. The kinetic solvent isotope effect was also analyzed. Micellar systems were formed using n-heptane as external nonpolar solvent and water as the polar component. According to the DLS studies, water is encapsulated inside the organized media; however, a different tendency is observed depending on the cationic component of the surfactant. For Na-AOT system, the results suggest that the micellar shapes are probably spherical, while in the case of bmim-AOT, a transition from ellipsoidal to spherical micelles could be occurring when water is added. 1H NMR data show that water is structured differently when Na+ cation is replaced by bmim+ in bmim-AOT RMs, the interaction of water with the surfactant is weaker and the water hydrogen-bonding network is less disturbed than in Na-AOT RMs. Kinetic studies reveal that the hydrolysis reaction in bmim-AOT RMs was much more favorable in comparison to Na-AOT RMs. In addition, when water content decreases in bmim-AOT RMs, the hydrolysis reaction rate increases and the solvent isotope effect remains constant, while for Na-AOT solutions, both the reaction rate and the solvent isotope effect decrease. Our results indicate that bmim+ cation would be located in the surfactant layer in such a way the negative charge density in the interface is less than that in Na-AOT RMs, and the reaction is more favorable. Additionally, as 1H NMR studies reveal, the interfacial water molecules would be more available in bmim-AOT RMs to participate in the nucleophilic attack. Therefore, the present study evidences how the replacement of Na+ counterion by bmim+ alters the composition of the interface of AOT RMs.
publishDate 2019
dc.date.none.fl_str_mv 2019-10
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/11336/120734
Dib, Nahir; Falcone, Ruben Dario; Acuña, Angel; García-Río, Luis; Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe; American Chemical Society; Langmuir; 35; 39; 10-2019; 12744-12753
0743-7463
1520-5827
CONICET Digital
CONICET
url http://hdl.handle.net/11336/120734
identifier_str_mv Dib, Nahir; Falcone, Ruben Dario; Acuña, Angel; García-Río, Luis; Characterization of reverse micelles formulated with the ionic-liquid-like surfactant Bmim-AOT and comparison with the traditional Na-AOT: Dynamic light scattering, 1H NMR spectroscopy, and hydrolysis reaction of carbonate as a probe; American Chemical Society; Langmuir; 35; 39; 10-2019; 12744-12753
0743-7463
1520-5827
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.langmuir.9b01083
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/acs.langmuir.9b01083
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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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score 13.13397

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