Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach
- Autores
- Silva Do Nascimento, Danielle; Insausti, Matías; Fernández Band, Beatriz Susana; Grunhut, Marcos
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis = 12,600 L mol− 1 cm− 1 at 291 nm) than the original trans-isomer (εtrans = 24,000 L mol− 1 cm− 1 at 310 nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29.2% (w/w) of a 3:1 mixture of ethanol (co-surfactant) and decaethylene glycol mono-dodecyl ether (surfactant), 1.5% (w/w) of oleic acid (oil phase) and 69.2% (w/w) of water. This microemulsion was prepared in a simple way, under moderate stirring at 25 °C and using acceptable, biocompatible and accessible materials for topical use. OMC was incorporated in the vehicle at a final concentration of 5.0% (w/w), taking into account the maximum permitted levels established by international norms. Then, a photolysis study of the loaded formulation was performed using a continuous flow system. The direct photolysis was monitored over time by molecular fluorescence. The recorded spectra data between 370 y 490 nm were analyzed by multivariate curve resolution-alternating least squares algorithm. The kinetic rate constants corresponding to the photolysis of the trans-OMC were calculated from the concentration profiles, resulting in 0.0049 s− 1 for the trans-OMC loaded microemulsion and 0.0131 s− 1 for the trans-OMC in aqueous media. These results demonstrate a higher photostability of the trans-OMC when loaded in the proposed vehicle with respect to the free trans-OMC in aqueous media.
Fil: Silva Do Nascimento, Danielle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Insausti, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Grunhut, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina - Materia
-
MOLECULAR FLUORESCENCE
MULTIVARIATE CURVE RESOLUTION-ALTERNATING LEAST SQUARES
O/W MICROEMULSION
OCTYL P-METHOXYCINNAMATE
PHOTOLYSIS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/94778
Ver los metadatos del registro completo
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Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approachSilva Do Nascimento, DanielleInsausti, MatíasFernández Band, Beatriz SusanaGrunhut, MarcosMOLECULAR FLUORESCENCEMULTIVARIATE CURVE RESOLUTION-ALTERNATING LEAST SQUARESO/W MICROEMULSIONOCTYL P-METHOXYCINNAMATEPHOTOLYSIShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis = 12,600 L mol− 1 cm− 1 at 291 nm) than the original trans-isomer (εtrans = 24,000 L mol− 1 cm− 1 at 310 nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29.2% (w/w) of a 3:1 mixture of ethanol (co-surfactant) and decaethylene glycol mono-dodecyl ether (surfactant), 1.5% (w/w) of oleic acid (oil phase) and 69.2% (w/w) of water. This microemulsion was prepared in a simple way, under moderate stirring at 25 °C and using acceptable, biocompatible and accessible materials for topical use. OMC was incorporated in the vehicle at a final concentration of 5.0% (w/w), taking into account the maximum permitted levels established by international norms. Then, a photolysis study of the loaded formulation was performed using a continuous flow system. The direct photolysis was monitored over time by molecular fluorescence. The recorded spectra data between 370 y 490 nm were analyzed by multivariate curve resolution-alternating least squares algorithm. The kinetic rate constants corresponding to the photolysis of the trans-OMC were calculated from the concentration profiles, resulting in 0.0049 s− 1 for the trans-OMC loaded microemulsion and 0.0131 s− 1 for the trans-OMC in aqueous media. These results demonstrate a higher photostability of the trans-OMC when loaded in the proposed vehicle with respect to the free trans-OMC in aqueous media.Fil: Silva Do Nascimento, Danielle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Insausti, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Grunhut, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaPergamon-Elsevier Science Ltd2018-02-10info: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/11336/94778Silva Do Nascimento, Danielle; Insausti, Matías; Fernández Band, Beatriz Susana; Grunhut, Marcos; Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach; Pergamon-Elsevier Science Ltd; Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; 191; 10-2-2018; 277-2821386-1425CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1386142517308223info:eu-repo/semantics/altIdentifier/doi/10.1016/j.saa.2017.10.025info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:10:09Zoai:ri.conicet.gov.ar:11336/94778instacron: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:34982025-10-22 11:10:09.378CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| title |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| spellingShingle |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach Silva Do Nascimento, Danielle MOLECULAR FLUORESCENCE MULTIVARIATE CURVE RESOLUTION-ALTERNATING LEAST SQUARES O/W MICROEMULSION OCTYL P-METHOXYCINNAMATE PHOTOLYSIS |
| title_short |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| title_full |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| title_fullStr |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| title_full_unstemmed |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| title_sort |
Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach |
| dc.creator.none.fl_str_mv |
Silva Do Nascimento, Danielle Insausti, Matías Fernández Band, Beatriz Susana Grunhut, Marcos |
| author |
Silva Do Nascimento, Danielle |
| author_facet |
Silva Do Nascimento, Danielle Insausti, Matías Fernández Band, Beatriz Susana Grunhut, Marcos |
| author_role |
author |
| author2 |
Insausti, Matías Fernández Band, Beatriz Susana Grunhut, Marcos |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
MOLECULAR FLUORESCENCE MULTIVARIATE CURVE RESOLUTION-ALTERNATING LEAST SQUARES O/W MICROEMULSION OCTYL P-METHOXYCINNAMATE PHOTOLYSIS |
| topic |
MOLECULAR FLUORESCENCE MULTIVARIATE CURVE RESOLUTION-ALTERNATING LEAST SQUARES O/W MICROEMULSION OCTYL P-METHOXYCINNAMATE PHOTOLYSIS |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis = 12,600 L mol− 1 cm− 1 at 291 nm) than the original trans-isomer (εtrans = 24,000 L mol− 1 cm− 1 at 310 nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29.2% (w/w) of a 3:1 mixture of ethanol (co-surfactant) and decaethylene glycol mono-dodecyl ether (surfactant), 1.5% (w/w) of oleic acid (oil phase) and 69.2% (w/w) of water. This microemulsion was prepared in a simple way, under moderate stirring at 25 °C and using acceptable, biocompatible and accessible materials for topical use. OMC was incorporated in the vehicle at a final concentration of 5.0% (w/w), taking into account the maximum permitted levels established by international norms. Then, a photolysis study of the loaded formulation was performed using a continuous flow system. The direct photolysis was monitored over time by molecular fluorescence. The recorded spectra data between 370 y 490 nm were analyzed by multivariate curve resolution-alternating least squares algorithm. The kinetic rate constants corresponding to the photolysis of the trans-OMC were calculated from the concentration profiles, resulting in 0.0049 s− 1 for the trans-OMC loaded microemulsion and 0.0131 s− 1 for the trans-OMC in aqueous media. These results demonstrate a higher photostability of the trans-OMC when loaded in the proposed vehicle with respect to the free trans-OMC in aqueous media. Fil: Silva Do Nascimento, Danielle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina Fil: Insausti, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina Fil: Fernández Band, Beatriz Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina Fil: Grunhut, Marcos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina |
| description |
Octyl p-methoxycinnamate (OMC) is one of the most widely used sunscreen agents. However, the efficiency of OMC as UV filter over time is affected due to the formation of the cis-isomer which presents a markedly lower extinction coefficient (εcis = 12,600 L mol− 1 cm− 1 at 291 nm) than the original trans-isomer (εtrans = 24,000 L mol− 1 cm− 1 at 310 nm). In this work, a novel carrier for OMC based on an oil-in-water microemulsion is proposed in order to improve the photostability of this sunscreen. The formulation was composed of 29.2% (w/w) of a 3:1 mixture of ethanol (co-surfactant) and decaethylene glycol mono-dodecyl ether (surfactant), 1.5% (w/w) of oleic acid (oil phase) and 69.2% (w/w) of water. This microemulsion was prepared in a simple way, under moderate stirring at 25 °C and using acceptable, biocompatible and accessible materials for topical use. OMC was incorporated in the vehicle at a final concentration of 5.0% (w/w), taking into account the maximum permitted levels established by international norms. Then, a photolysis study of the loaded formulation was performed using a continuous flow system. The direct photolysis was monitored over time by molecular fluorescence. The recorded spectra data between 370 y 490 nm were analyzed by multivariate curve resolution-alternating least squares algorithm. The kinetic rate constants corresponding to the photolysis of the trans-OMC were calculated from the concentration profiles, resulting in 0.0049 s− 1 for the trans-OMC loaded microemulsion and 0.0131 s− 1 for the trans-OMC in aqueous media. These results demonstrate a higher photostability of the trans-OMC when loaded in the proposed vehicle with respect to the free trans-OMC in aqueous media. |
| publishDate |
2018 |
| dc.date.none.fl_str_mv |
2018-02-10 |
| 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/11336/94778 Silva Do Nascimento, Danielle; Insausti, Matías; Fernández Band, Beatriz Susana; Grunhut, Marcos; Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach; Pergamon-Elsevier Science Ltd; Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; 191; 10-2-2018; 277-282 1386-1425 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/94778 |
| identifier_str_mv |
Silva Do Nascimento, Danielle; Insausti, Matías; Fernández Band, Beatriz Susana; Grunhut, Marcos; Photolysis study of octyl p-methoxycinnamate loaded microemulsion by molecular fluorescence and chemometric approach; Pergamon-Elsevier Science Ltd; Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; 191; 10-2-2018; 277-282 1386-1425 CONICET Digital CONICET |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1386142517308223 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.saa.2017.10.025 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf application/pdf |
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Pergamon-Elsevier Science Ltd |
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Pergamon-Elsevier Science Ltd |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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