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Abstract:

Molecular films obtained by electrochemical reduction of diazoniuim tetrafluoroborate salts [4-carboxybenzene (PhCOOH) and 4-amino-(2,3,5,6- tetrafluoro)-carboxybenzene (PhF 4COOH)] on Au substrates and post-functionalization with an osmium pyridil-bipyridine complex are studied by a combination of X-ray photoelectron (XPS) and polarization-modulation infrared reflection absorption spectroscopy (PM-IRRAS). The spectroscopic evidence suggests the formation of N-N bonds tethering the complexes to Au. The surface coverage of the azo-bonded osmium complexes strongly depends on the electrode potential. The resulting tethered osmium redox centres were characterized by cyclic voltammetry and impedance spectroscopy. Similar electron transfer-rate constants were measured for both fluorinated and non fluorinated benzene-linked Os complexes. © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Registro:

Documento: Artículo
Título:Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
Autor:Ricci, A.M.; Méndez De Leo, L.P.; Williams, F.J.; Calvo, E.J.
Filiación:Departmento de Quìmica Inorgánica, Analítica y Química Física, INQUIMAE, Facultad de Ciencias Exactas y Naturales, Pabellõn 2, AR-1428. Buenos Aires, Argentina
Aluar Aluminio Argentino SAIC, Puerto Madryn, Chubut, Argentina
Palabras clave:diazo compounds; monolayers; osmium; polarization-modulation infrared reflection absorption spectroscopy; X-ray photoelectron spectroscopy
Año:2012
Volumen:13
Número:8
Página de inicio:2119
Página de fin:2127
DOI: http://dx.doi.org/10.1002/cphc.201100882
Título revista:ChemPhysChem
Título revista abreviado:ChemPhysChem
ISSN:14394235
CODEN:CPCHF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14394235_v13_n8_p2119_Ricci

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Citas:

---------- APA ----------
Ricci, A.M., Méndez De Leo, L.P., Williams, F.J. & Calvo, E.J. (2012) . Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates. ChemPhysChem, 13(8), 2119-2127.
http://dx.doi.org/10.1002/cphc.201100882
---------- CHICAGO ----------
Ricci, A.M., Méndez De Leo, L.P., Williams, F.J., Calvo, E.J. "Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates" . ChemPhysChem 13, no. 8 (2012) : 2119-2127.
http://dx.doi.org/10.1002/cphc.201100882
---------- MLA ----------
Ricci, A.M., Méndez De Leo, L.P., Williams, F.J., Calvo, E.J. "Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates" . ChemPhysChem, vol. 13, no. 8, 2012, pp. 2119-2127.
http://dx.doi.org/10.1002/cphc.201100882
---------- VANCOUVER ----------
Ricci, A.M., Méndez De Leo, L.P., Williams, F.J., Calvo, E.J. Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates. ChemPhysChem. 2012;13(8):2119-2127.
http://dx.doi.org/10.1002/cphc.201100882