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Abstract:

The mesostructural and electrochemical characterization of a redox-active polyelectrolyte-surfactant complex formed by polyallylamine tagged with an osmium complex and dodecylsulfate is presented. X-ray reflectivity (XRR), grazing-incidence small-angle X-ray scattering (GISAXS), X-ray photoelectron spectroscopy (XPS), contact angle goniometry (CA) and cyclic voltammetry (CV), including the numerical simulation of the voltammetric response, were employed to analyze the structure, stability and the electrochemical response of these supramolecular films. In contrast to redox-active polyelectrolyte multilayers (PEMs), the self-assembled system presented here shows a mesoscopic order yielding a film of layered structure very stable to an aqueous environment where the hydrophilic moieties (amino and sulfate groups) are not exposed to the solution since a contact angle of 95 is observed upon exposure to water. However, the film shows a self-exchange electron transfer mechanism with an apparent diffusion coefficient of 2 × 10-9 cm2 s-1 for a film of 300 nm of thickness. This behavior shows that the film exposed to an aqueous solution undergoes a fast electron transfer process to/from the electrode surface and ions to/from the electrolyte solution. © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions
Autor:Cortez, M.L.; González, G.A.; Ceolín, M.; Azzaroni, O.; Battaglini, F.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Ciudad Universitaria, Pabellón 2, C1428EHA Buenos Aires, Argentina
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química - Facultad de Ciencias Exactas, CONICET, CC 16 Suc. 4, (1900) La Plata, Argentina
Palabras clave:GISAXS, self-exchange electron transfer; mesostructure; Redox-polyelectrolyte; surfactant; Apparent diffusion coefficient; Electrochemical characterizations; Electron transfer mechanisms; Grazing incidence small-angle X-ray scattering; Mesostructures; Polyelectrolyte-surfactant complexes; Redox-polyelectrolyte; Self-exchange; Contact angle; Cyclic voltammetry; Diffusion; Electrodes; Electron transitions; Electron transport properties; Photoelectrons; Polyelectrolytes; Surface active agents; X ray photoelectron spectroscopy; Supramolecular chemistry
Año:2014
Volumen:118
Página de inicio:124
Página de fin:129
DOI: http://dx.doi.org/10.1016/j.electacta.2013.11.188
Título revista:Electrochimica Acta
Título revista abreviado:Electrochim Acta
ISSN:00134686
CODEN:ELCAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v118_n_p124_Cortez

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Citas:

---------- APA ----------
Cortez, M.L., González, G.A., Ceolín, M., Azzaroni, O. & Battaglini, F. (2014) . Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions. Electrochimica Acta, 118, 124-129.
http://dx.doi.org/10.1016/j.electacta.2013.11.188
---------- CHICAGO ----------
Cortez, M.L., González, G.A., Ceolín, M., Azzaroni, O., Battaglini, F. "Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions" . Electrochimica Acta 118 (2014) : 124-129.
http://dx.doi.org/10.1016/j.electacta.2013.11.188
---------- MLA ----------
Cortez, M.L., González, G.A., Ceolín, M., Azzaroni, O., Battaglini, F. "Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions" . Electrochimica Acta, vol. 118, 2014, pp. 124-129.
http://dx.doi.org/10.1016/j.electacta.2013.11.188
---------- VANCOUVER ----------
Cortez, M.L., González, G.A., Ceolín, M., Azzaroni, O., Battaglini, F. Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions. Electrochim Acta. 2014;118:124-129.
http://dx.doi.org/10.1016/j.electacta.2013.11.188