Theoretical treatment of ion transfers in two polarisable interface systems when the analyte has access to both interfaces.

Olmos Martínez, José Manuel; Molina Gómez, María de los Ángeles; Laborda Ochando, Eduardo; Millán-Barrios, Enrique; Ortuño Sánchez-Pedreño, Joaquín Ángel

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Theoretical treatment of ion transfers in two polarisable interface systems when the analyte has access to both interfaces.

dc.contributor.author	Olmos Martínez, José Manuel
dc.contributor.author	Molina Gómez, María de los Ángeles
dc.contributor.author	Laborda Ochando, Eduardo
dc.contributor.author	Millán-Barrios, Enrique
dc.contributor.author	Ortuño Sánchez-Pedreño, Joaquín Ángel
dc.contributor.department	Química Analítica
dc.date.accessioned	2024-02-10T18:25:43Z
dc.date.available	2024-02-10T18:25:43Z
dc.date.created	2017
dc.date.issued	2018
dc.description	This document is the Accepted Manuscript version of a Published Work that appeared in final form in Analytical Chemistry, copyright © 2017 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.analchem.7b04321	es
dc.description	Item en revisión, pendiente de cumplimentar metadatos.
dc.description.abstract	A new theory is presented to tackle the study of transfer processes of hydrophilic ions in two polarisable interface systems when the analyte is initially present in both aqueous phases. The treatment is applied to macrointerfaces (linear diffusion) and microholes (highly convergent diffusion), obtaining analytical equations for the current response in any voltammetric technique. The novel equations predict two signals in the current-potential curves that are symmetric when the compositions of the aqueous phases are identical while asymmetries appear otherwise. The theoretical results show good agreement with the experimental behaviour of the “double transfer voltammograms” reported by Dryfe et al. in cyclic voltammetry (CV) (Anal. Chem. 2013, 86, 435-442) as well as with cyclic square wave voltammetry (cSWV) experiments here performed. The theoretical treatment is also extended to the situation where the target ion is lipophylic and it is initially present in the organic phase. The theory predicts an opposite effect of the lipophilicity of the ion on the shape of the voltammograms, which is validated experimentally via both CV and cSWV. For the above two cases, simple and manageable expressions and diagnosis criteria are derived for the qualitative and quantitative study of ions lipophilicity. The formal ion-transfer potentials can be easily quantified from the separation between the two signals making use of explicit analytical equations.	es
dc.format	application/pdf	es
dc.format.extent	20	es
dc.identifier.citation	Analytical Chemistry (2018), 90(3), 2088–2094
dc.identifier.doi	https://doi.org/10.1021/acs.analchem.7b04321
dc.identifier.issn	Electronic: 1520-6882
dc.identifier.issn	Print: 0003-2700
dc.identifier.uri	http://hdl.handle.net/10201/139209
dc.language	eng	es
dc.publisher	American Chemical Society (ACS)	es
dc.relation	Esta publicación es resultante de 3 proyectos de investigación. Uno de ellos es de ámbito regional, está financiado por la Fundación Séneca de la Región de Murcia dentro de la convocatoria de “Ayudas a los Grupos y Unidades de Excelencia Científica de la Región de Murcia (2015)" y tiene por título "Advances in the study of charge transfer processes at static and dynamic micro- and nano-interfaces" (referencia 19887/GERM/15). Los otros dos proyectos son de ámbito nacional. El primero de ellos está financiado por el Ministerio de Economía y Competitividad dentro del Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia, Subprograma Estatal de Generación de Conocimiento, convocatoria 2015, modalidad 1: Proyectos de I+D, y tiene por título "Electrocatálisis molecular en diferentes interfases: análisis de la respuesta electroquímica"(referencia CTQ2015-65243-P). El segundo de ellos está financiado por el Ministerio de Economía y Competitividad dentro de la Convocatoria 2015 de Acciones de dinamización "Redes de Excelencia" del Programa Estatal de Investigación Científica y Técnica de Excelencia, Subprograma Estatal de Generación de Conocimiento y tiene por título "Red de Excelencia Sensores y Biosensores" (referencia CTQ2015-71955-REDT)	es
dc.relation.publisherversion	https://pubs.acs.org/doi/10.1021/acs.analchem.7b04321	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	Two polarisable interfaces	es
dc.subject	Ion-transfer voltammetry	es
dc.subject	Analytical theory	es
dc.subject	Standard ion-transfer potential	es
dc.subject	Solvent polymeric membranes	es
dc.subject.other	CDU::5 - Ciencias puras y naturales	es
dc.title	Theoretical treatment of ion transfers in two polarisable interface systems when the analyte has access to both interfaces.	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es

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