Influence of Intermolecular Interactions in the Redox Kinetics Performance of Surface Confined Probes by Square Wave Voltammetry

Gonzalez, Joaquin; Sequí Castellano, Jose Alfonso

Publication:
Influence of Intermolecular Interactions in the Redox Kinetics Performance of Surface Confined Probes by Square Wave Voltammetry

dc.contributor.author	Gonzalez, Joaquin
dc.contributor.author	Sequí Castellano, Jose Alfonso
dc.contributor.department	Química Física
dc.date.accessioned	2021-04-15T17:15:18Z
dc.date.available	2021-04-15T17:15:18Z
dc.date.issued	2019-10
dc.description.abstract	Analysis of the Square Wave Voltammetry (SWV) responses of surface confined electroactive probes under finite kinetics conditions, by considering the influence of intermolecular interactions on the current, is presented. This non-ideality gives rise to very significant deviations in the most relevant features of the current potential response as compared with predictions of ideal models. The theoretical model does not require that the dependence of the rate constant with the potential (i. e., Butler-Volmer or Marcus-Hush kinetic formalisms) is explicitly established a priori. Both location and height of the Quasi-Reversible Maximum and symmetry of the SWV current-potential curves are strongly affected by the interaction parameters G=aOO+aRR-2aOR and S=aRR-aOO (with aij being the interaction coefficient for species i and j). Quantitative methods for obtaining kinetic and interaction parameters of the redox probes are presented, based on the measurement of the peak currents and potential under quasi-reversible conditions where the current exhibits two asymmetric peaks. A discussion is done concerning the deviations found in the estimation of the rate constants with SWV when intermolecular interactions are not considered. The above methods have been applied to the characterisation of mixed ferrocenylundecanethiol / decanethiol monolayers on gold electrodes at an ethanolic medium for which the SWV is clearly non-ideal	es
dc.format	application/pdf	es
dc.format.extent	37	es
dc.identifier.citation	Journal of Electroanalytical Chemistry, 2019, 854, 113549
dc.identifier.doi	10.1016/j.jelechem.2019.113549
dc.identifier.uri	http://hdl.handle.net/10201/106621
dc.language	eng	es
dc.relation	Ámbito del proyecto (Europeo, nacional o regional): Regional Agencia/entidad financiadora: Fundación SENECA Convocatoria: Convocatoria de ayudas a las unidades y grupos de excelencia científica de la Región de Murcia (Programa Séneca 2014) Nombre del proyecto: Advances in the study of charge transfer processes at static and dynamic micro-and nano-interfaces Código: 19887/GERM/15	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S1572665719308173	es
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject	Square Wave Voltammetry	es
dc.subject	Electroactive Monolayer	es
dc.subject	Electrode kinetics	es
dc.subject.other	CDU::5 - Ciencias puras y naturales	es
dc.subject.other	CDU::5 - Ciencias puras y naturales::54 - Química::544 - Química física	es
dc.title	Influence of Intermolecular Interactions in the Redox Kinetics Performance of Surface Confined Probes by Square Wave Voltammetry	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es