Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions
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...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v118_n_p124_Cortez http://hdl.handle.net/20.500.12110/paper_00134686_v118_n_p124_Cortez |
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paper:paper_00134686_v118_n_p124_Cortez2023-06-08T14:35:45Z Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions 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 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. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v118_n_p124_Cortez http://hdl.handle.net/20.500.12110/paper_00134686_v118_n_p124_Cortez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| topic_facet |
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 |
| description |
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. |
| title |
Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| title_short |
Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| title_full |
Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| title_fullStr |
Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| title_full_unstemmed |
Self-assembled redox polyelectrolyte-surfactant complexes: Nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| title_sort |
self-assembled redox polyelectrolyte-surfactant complexes: nanostructure and electron transfer characteristics of supramolecular films with built-in electroactive chemical functions |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v118_n_p124_Cortez http://hdl.handle.net/20.500.12110/paper_00134686_v118_n_p124_Cortez |
| _version_ |
1768545491774078976 |