Adsorption of phenol on gold as studied by capacitance and reflectancen measurements

Autores
Lezna, Reynaldo Oscar; Tacconi, Norma R. de; Centeno, Silvia Adriana; Arvia, Alejandro Jorge
Año de publicación
1991
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Adsorption of phenol on a polycrystalline gold electrode has been studied by capacitance and modulated reflectance measurements. Two main processes were detected. First, an adsorption-desorption peak was observed at negative charge on the electrode which was related to a flat configuration of the molecule bonded to the surface through its ir system. In this case the interactions between adsorbed phenol and the electrode are not strong enough to modify the intrinsic optical properties of the metal. A second capacitive peak, detected over a region of positive charge on the metal, was found to show hysteresis and, besides, it distorts the electroreflectance effect of gold to such an extent that separation of the optical effects of charge and coverage was not possible. This behavior, typical of the formation of strong covalent bonds, was associated with the reorientation of the molecule from flat to vertically attached to the metal by means of its oxygen atom.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/118999
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/118999
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Adsorption of phenol on gold as studied by capacitance and reflectancen measurementsLezna, Reynaldo OscarTacconi, Norma R. deCenteno, Silvia AdrianaArvia, Alejandro JorgeCiencias ExactasQuímicaAdsorption of phenolCapacitance measurementsModulated reflectance measurementsAdsorption of phenol on a polycrystalline gold electrode has been studied by capacitance and modulated reflectance measurements. Two main processes were detected. First, an adsorption-desorption peak was observed at negative charge on the electrode which was related to a flat configuration of the molecule bonded to the surface through its ir system. In this case the interactions between adsorbed phenol and the electrode are not strong enough to modify the intrinsic optical properties of the metal. A second capacitive peak, detected over a region of positive charge on the metal, was found to show hysteresis and, besides, it distorts the electroreflectance effect of gold to such an extent that separation of the optical effects of charge and coverage was not possible. This behavior, typical of the formation of strong covalent bonds, was associated with the reorientation of the molecule from flat to vertically attached to the metal by means of its oxygen atom.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1991info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1241–1246http://sedici.unlp.edu.ar/handle/10915/118999enginfo:eu-repo/semantics/altIdentifier/issn/0743-7463info:eu-repo/semantics/altIdentifier/issn/1520-5827info:eu-repo/semantics/altIdentifier/doi/10.1021/la00054a037info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:28:00Zoai:sedici.unlp.edu.ar:10915/118999Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:01.021SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
title Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
spellingShingle Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
Lezna, Reynaldo Oscar
Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
title_short Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
title_full Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
title_fullStr Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
title_full_unstemmed Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
title_sort Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
dc.creator.none.fl_str_mv Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
author Lezna, Reynaldo Oscar
author_facet Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
author_role author
author2 Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
topic Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
dc.description.none.fl_txt_mv Adsorption of phenol on a polycrystalline gold electrode has been studied by capacitance and modulated reflectance measurements. Two main processes were detected. First, an adsorption-desorption peak was observed at negative charge on the electrode which was related to a flat configuration of the molecule bonded to the surface through its ir system. In this case the interactions between adsorbed phenol and the electrode are not strong enough to modify the intrinsic optical properties of the metal. A second capacitive peak, detected over a region of positive charge on the metal, was found to show hysteresis and, besides, it distorts the electroreflectance effect of gold to such an extent that separation of the optical effects of charge and coverage was not possible. This behavior, typical of the formation of strong covalent bonds, was associated with the reorientation of the molecule from flat to vertically attached to the metal by means of its oxygen atom.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Adsorption of phenol on a polycrystalline gold electrode has been studied by capacitance and modulated reflectance measurements. Two main processes were detected. First, an adsorption-desorption peak was observed at negative charge on the electrode which was related to a flat configuration of the molecule bonded to the surface through its ir system. In this case the interactions between adsorbed phenol and the electrode are not strong enough to modify the intrinsic optical properties of the metal. A second capacitive peak, detected over a region of positive charge on the metal, was found to show hysteresis and, besides, it distorts the electroreflectance effect of gold to such an extent that separation of the optical effects of charge and coverage was not possible. This behavior, typical of the formation of strong covalent bonds, was associated with the reorientation of the molecule from flat to vertically attached to the metal by means of its oxygen atom.
publishDate 1991
dc.date.none.fl_str_mv 1991
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/118999
url http://sedici.unlp.edu.ar/handle/10915/118999
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0743-7463
info:eu-repo/semantics/altIdentifier/issn/1520-5827
info:eu-repo/semantics/altIdentifier/doi/10.1021/la00054a037
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1241–1246
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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