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Abstract:

Direct evidence of a net gain or loss of water by redox switching self-assembled redox active polyelectrolyte multilayers from/to the liquid electrolyte has been obtained by "in situ" infrared spectroscopy. This is in agreement with EQCM microgravimetry and ellipsometry thickness change upon oxidation-reduction cycles due to the exchange of ions and solvent, which results in film swelling. Infrared evidence of a change in the environment of functional groups, i.e., SO3-, NH3+ and bipyridines in the films formed by poly(allylamine) modified covalently by an osmium bipyridine-pyridine complex (PAH-Os) and polystyrene sulfonate (PSS) has also been obtained by SNIFTIRS. This has been interpreted as break of the polycation-polyanion chain electrostatic interaction by mobile cations and anions from the solution forming ion pairs with the polyelectrolyte chains in the film during "break in". © 2006 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Hydration cycling in redox active LBL self-assembled polyelectrolyte multilayers
Autor:Grumelli, D.; Bonazzola, C.; Calvo, E.J.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, C1428EHA Buenos Aires, Argentina
Palabras clave:FTIR; LBL; Osmium bipyridil; PEMs; Self-assembly; SNIFTIRS; Solvent exchange; Hydration; Multilayers; Polystyrenes; Positive ions; Redox reactions; Self assembly; Osmium bipyridil; SNIFTIRS; Solvent exchange; Polyelectrolytes
Año:2006
Volumen:8
Número:8
Página de inicio:1353
Página de fin:1357
DOI: http://dx.doi.org/10.1016/j.elecom.2006.06.015
Título revista:Electrochemistry Communications
Título revista abreviado:Electrochem. Commun.
ISSN:13882481
CODEN:ECCMF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13882481_v8_n8_p1353_Grumelli

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Citas:

---------- APA ----------
Grumelli, D., Bonazzola, C. & Calvo, E.J. (2006) . Hydration cycling in redox active LBL self-assembled polyelectrolyte multilayers. Electrochemistry Communications, 8(8), 1353-1357.
http://dx.doi.org/10.1016/j.elecom.2006.06.015
---------- CHICAGO ----------
Grumelli, D., Bonazzola, C., Calvo, E.J. "Hydration cycling in redox active LBL self-assembled polyelectrolyte multilayers" . Electrochemistry Communications 8, no. 8 (2006) : 1353-1357.
http://dx.doi.org/10.1016/j.elecom.2006.06.015
---------- MLA ----------
Grumelli, D., Bonazzola, C., Calvo, E.J. "Hydration cycling in redox active LBL self-assembled polyelectrolyte multilayers" . Electrochemistry Communications, vol. 8, no. 8, 2006, pp. 1353-1357.
http://dx.doi.org/10.1016/j.elecom.2006.06.015
---------- VANCOUVER ----------
Grumelli, D., Bonazzola, C., Calvo, E.J. Hydration cycling in redox active LBL self-assembled polyelectrolyte multilayers. Electrochem. Commun. 2006;8(8):1353-1357.
http://dx.doi.org/10.1016/j.elecom.2006.06.015