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

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 mo...

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Autores principales: Lezna, Reynaldo Oscar, Tacconi, Norma R. de, Centeno, Silvia Adriana, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1991
Materias:
Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/118999
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-118999
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
spellingShingle Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
Adsorption of phenol on gold as studied by capacitance and reflectancen measurements
topic_facet Ciencias Exactas
Química
Adsorption of phenol
Capacitance measurements
Modulated reflectance measurements
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.
format Articulo
Articulo
author Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
author_facet Lezna, Reynaldo Oscar
Tacconi, Norma R. de
Centeno, Silvia Adriana
Arvia, Alejandro Jorge
author_sort Lezna, Reynaldo Oscar
title Adsorption of phenol on gold as studied by capacitance and reflectancen 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
publishDate 1991
url http://sedici.unlp.edu.ar/handle/10915/118999
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AT centenosilviaadriana adsorptionofphenolongoldasstudiedbycapacitanceandreflectancenmeasurements
AT arviaalejandrojorge adsorptionofphenolongoldasstudiedbycapacitanceandreflectancenmeasurements
bdutipo_str Repositorios
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