Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates

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...

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Autores principales:	Ricci, A.M., Méndez De Leo, L.P., Williams, F.J., Calvo, E.J.
Formato:	JOUR
Materias:	diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_14394235_v13_n8_p2119_Ricci
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_14394235_v13_n8_p2119_Ricci
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spelling	todo:paper_14394235_v13_n8_p2119_Ricci2023-10-03T16:16:17Z Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates Ricci, A.M. Méndez De Leo, L.P. Williams, F.J. Calvo, E.J. diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy 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. Fil:Ricci, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Méndez De Leo, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14394235_v13_n8_p2119_Ricci
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy
spellingShingle	diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy 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
topic_facet	diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy
description	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.
format	JOUR
author	Ricci, A.M. Méndez De Leo, L.P. Williams, F.J. Calvo, E.J.
author_facet	Ricci, A.M. Méndez De Leo, L.P. Williams, F.J. Calvo, E.J.
author_sort	Ricci, A.M.
title	Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
title_short	Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
title_full	Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
title_fullStr	Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
title_full_unstemmed	Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates
title_sort	some evidence for the formation of an azo bond during the electroreduction of diazonium salts on au substrates
url	http://hdl.handle.net/20.500.12110/paper_14394235_v13_n8_p2119_Ricci
work_keys_str_mv	AT ricciam someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT mendezdeleolp someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT williamsfj someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT calvoej someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates
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Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates

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