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...

Descripción completa

Detalles Bibliográficos
Autores principales:	Ricci, Alejandra Marcela, Mendez De Leo, Lucila Paula, Williams, Federico Jose, Calvo, Ernesto Julio
Publicado:	2012
Materias:	diazo compounds monolayers osmium polarization-modulation infrared reflection absorption spectroscopy X-ray photoelectron spectroscopy
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14394235_v13_n8_p2119_Ricci 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	paper:paper_14394235_v13_n8_p2119_Ricci
record_format	dspace
spelling	paper:paper_14394235_v13_n8_p2119_Ricci2023-06-08T16:16:00Z Some evidence for the formation of an azo bond during the electroreduction of diazonium salts on Au substrates Ricci, Alejandra Marcela Mendez De Leo, Lucila Paula Williams, Federico Jose Calvo, Ernesto Julio 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. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14394235_v13_n8_p2119_Ricci 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, Alejandra Marcela Mendez De Leo, Lucila Paula Williams, Federico Jose Calvo, Ernesto Julio 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.
author	Ricci, Alejandra Marcela Mendez De Leo, Lucila Paula Williams, Federico Jose Calvo, Ernesto Julio
author_facet	Ricci, Alejandra Marcela Mendez De Leo, Lucila Paula Williams, Federico Jose Calvo, Ernesto Julio
author_sort	Ricci, Alejandra Marcela
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
publishDate	2012
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14394235_v13_n8_p2119_Ricci http://hdl.handle.net/20.500.12110/paper_14394235_v13_n8_p2119_Ricci
work_keys_str_mv	AT riccialejandramarcela someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT mendezdeleolucilapaula someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT williamsfedericojose someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates AT calvoernestojulio someevidencefortheformationofanazobondduringtheelectroreductionofdiazoniumsaltsonausubstrates
_version_	1768546413788004352

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

Ejemplares similares