ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES

This study shows the results obtained when binding alkyl ferrocene molecules on silicon surface forming incomplete monolayers. The electrodic surface functionalization is carried out by a two step procedure: First, a hydrosilytation reaction between a Si-H surface and an alkenyl bromide active by wh...

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Autores principales:	RIVEROS,G, MENESES,S, ESCOBAR,S, GARÍN,C, CHORNIK,B
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2010
Materias:	Silicon electrode redox monolayers AC voltammetry eletron transfer
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100015
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spelling	oai:scielo:S0717-970720100001000152010-04-29ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODESRIVEROS,GMENESES,SESCOBAR,SGARÍN,CCHORNIK,B Silicon electrode redox monolayers AC voltammetry eletron transfer This study shows the results obtained when binding alkyl ferrocene molecules on silicon surface forming incomplete monolayers. The electrodic surface functionalization is carried out by a two step procedure: First, a hydrosilytation reaction between a Si-H surface and an alkenyl bromide active by white light; and then, the reaction of this surface with a monolithio ferrocene solution. Alkenyl bromide with different numbers of carbon atoms (3, 5 and 10 carbon atoms) were employed in order to obtain propyl, pentyl and decyl ferrocene chains on the electrodic surface. The samples of modified silicon were analyzed by X-ray photoelectron spectroscopy (XPS) and electrochemical measurements confirmingthe presence of ferrocene molecules onthe electrode surface. The results obtained show that in each and every case, there were incomplete monolayers on the silicon surface, ranging from 16% to 42 %, depending on the alkenyl bromide employed in the synthesis. AC voltammetry was employed to determine the kinetic of the eletron transfer between ferrocene molecules and the silicon electrode. However, therate constant is not influenced by the lengthofthe alkyl chain, and is usually constant (2.01 s-1-3.66 s-1). The result above is due to the eletron transfer process which is determine by eletron hopping in a regime of bonded diffusion and not by a long-rate eletron transfer such as in a full compact monolayer.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.55 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100015en10.4067/S0717-97072010000100015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Silicon electrode redox monolayers AC voltammetry eletron transfer
spellingShingle	Silicon electrode redox monolayers AC voltammetry eletron transfer RIVEROS,G MENESES,S ESCOBAR,S GARÍN,C CHORNIK,B ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
description	This study shows the results obtained when binding alkyl ferrocene molecules on silicon surface forming incomplete monolayers. The electrodic surface functionalization is carried out by a two step procedure: First, a hydrosilytation reaction between a Si-H surface and an alkenyl bromide active by white light; and then, the reaction of this surface with a monolithio ferrocene solution. Alkenyl bromide with different numbers of carbon atoms (3, 5 and 10 carbon atoms) were employed in order to obtain propyl, pentyl and decyl ferrocene chains on the electrodic surface. The samples of modified silicon were analyzed by X-ray photoelectron spectroscopy (XPS) and electrochemical measurements confirmingthe presence of ferrocene molecules onthe electrode surface. The results obtained show that in each and every case, there were incomplete monolayers on the silicon surface, ranging from 16% to 42 %, depending on the alkenyl bromide employed in the synthesis. AC voltammetry was employed to determine the kinetic of the eletron transfer between ferrocene molecules and the silicon electrode. However, therate constant is not influenced by the lengthofthe alkyl chain, and is usually constant (2.01 s-1-3.66 s-1). The result above is due to the eletron transfer process which is determine by eletron hopping in a regime of bonded diffusion and not by a long-rate eletron transfer such as in a full compact monolayer.
author	RIVEROS,G MENESES,S ESCOBAR,S GARÍN,C CHORNIK,B
author_facet	RIVEROS,G MENESES,S ESCOBAR,S GARÍN,C CHORNIK,B
author_sort	RIVEROS,G
title	ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
title_short	ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
title_full	ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
title_fullStr	ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
title_full_unstemmed	ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES
title_sort	electron transfer rates of alkyl-ferrocene molecules forming incomplete monolayer on silicon electrodes
publisher	Sociedad Chilena de Química
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100015
work_keys_str_mv	AT riverosg electrontransferratesofalkylferrocenemoleculesformingincompletemonolayeronsiliconelectrodes AT menesess electrontransferratesofalkylferrocenemoleculesformingincompletemonolayeronsiliconelectrodes AT escobars electrontransferratesofalkylferrocenemoleculesformingincompletemonolayeronsiliconelectrodes AT garinc electrontransferratesofalkylferrocenemoleculesformingincompletemonolayeronsiliconelectrodes AT chornikb electrontransferratesofalkylferrocenemoleculesformingincompletemonolayeronsiliconelectrodes
_version_	1718445420299943936

ELECTRON TRANSFER RATES OF ALKYL-FERROCENE MOLECULES FORMING INCOMPLETE MONOLAYER ON SILICON ELECTRODES

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