dc.creator | Luque, Antonio M. | es |
dc.creator | Cuesta, Ángel | es |
dc.creator | Calvente Pacheco, Juan José | es |
dc.creator | Andreu Fondacabe, Rafael Jesús | es |
dc.date.accessioned | 2023-07-03T16:18:46Z | |
dc.date.available | 2023-07-03T16:18:46Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Luque, A.M., Cuesta, Á., Calvente Pacheco, J.J. y Andreu Fondacabe, R.J. (2014). Potentiostatic infrared titration of 11-mercaptoundecanoic acid monolayers. Electrochemistry Communications, 45, 13-16. https://doi.org/10.1016/j.elecom.2014.05.011. | |
dc.identifier.issn | 1388-2481 | es |
dc.identifier.uri | https://hdl.handle.net/11441/147643 | |
dc.description.abstract | In situ IR difference spectra of 11-mercaptoundecanoic acid monolayers deposited on gold have been recorded as a function of both solution pH* and substrate's potential. IR spectra recorded under voltammetric conditions indicate that the potential-induced ionization of the monolayer is a slow process, involving a simultaneous rearrangement of the hydrocarbon chains, and that a significant population of carboxylic groups are not dissociated at positive potentials in a pH* 9 solution. Steep potentiostatic IR titration curves, consistent with a monolayer pKa = 4.3, are obtained at negative potentials. As the potential is made more positive, titration curves become lower, broader and are shifted towards more basic pHs. Rather than acting directly on the electrostatic energy of the carboxylate groups, the electrode potential seems to control the ionization of the monolayer by attracting (or repelling) cations from the electrolyte and by reorienting the thiol head groups inside and outside the low permittivity layer of methylene chains. | es |
dc.description.sponsorship | Dirección General de Investigación Científica y Técnica CTQ2008-00371 | es |
dc.description.sponsorship | Junta de Andalucía P07-FQM-02492 | es |
dc.format | application/pdf | es |
dc.format.extent | 15 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Electrochemistry Communications, 45, 13-16. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Acid monolayers | es |
dc.subject | ATR-SEIRAS | es |
dc.subject | Potential-induced proton transfer | es |
dc.subject | Potential-induced reorientation | es |
dc.subject | Surface IR titration | es |
dc.title | Potentiostatic infrared titration of 11-mercaptoundecanoic acid monolayers | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Química Física | es |
dc.relation.projectID | CTQ2008-00371 | es |
dc.relation.projectID | P07-FQM-02492 | es |
dc.relation.publisherversion | https://doi.org/10.1016/j.elecom.2014.05.011 | es |
dc.identifier.doi | 10.1016/j.elecom.2014.05.011 | es |
dc.journaltitle | Electrochemistry Communications | es |
dc.publication.volumen | 45 | es |
dc.publication.initialPage | 13 | es |
dc.publication.endPage | 16 | es |
dc.contributor.funder | Dirección General de Investigación Científica y Técnica (DGICYT). España | es |
dc.contributor.funder | Junta de Andalucía | es |