Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes

The diffusion of ferrocene methanol in super-cooled aqueous solutions containing sucrose has been studied, using disk and cylindrical microelectrodes, over a wide viscosity range. The solution viscosity and the reduced temperature T/Tg (Tg being the glass transition temperature) were varied by chang...

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Detalles Bibliográficos
Autores principales:	Longinotti, M.P., Corti, H.R.
Formato:	JOUR
Materias:	Aqueous solutions Diffusion Ferrocene methanol Micro-electrodes Super-cooled Microelectrodes Solutions Sugar (sucrose) Supercooling Viscosity Glass forming liquids Solution viscosity Sucrose concentration Methanol
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_13882481_v9_n7_p1444_Longinotti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_13882481_v9_n7_p1444_Longinotti
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spelling	todo:paper_13882481_v9_n7_p1444_Longinotti2023-10-03T16:12:40Z Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes Longinotti, M.P. Corti, H.R. Aqueous solutions Diffusion Ferrocene methanol Micro-electrodes Super-cooled Diffusion Microelectrodes Solutions Sugar (sucrose) Supercooling Viscosity Ferrocene methanol Glass forming liquids Solution viscosity Sucrose concentration Methanol The diffusion of ferrocene methanol in super-cooled aqueous solutions containing sucrose has been studied, using disk and cylindrical microelectrodes, over a wide viscosity range. The solution viscosity and the reduced temperature T/Tg (Tg being the glass transition temperature) were varied by changing the sucrose concentration and the temperature of the system. The voltammetric limiting current obtained with a disk microelectrode and the i(t) response on a cylindrical microelectrode after a potential step were used to determine diffusion coefficients from 7 × 10-6 cm2 s-1 down to 2 × 10-11 cm2 s-1. The electrochemical procedure described in this work allows a simple and accurate measurement of the dynamics of electroactive solutes in glass-forming liquids. © 2007 Elsevier B.V. All rights reserved. Fil:Longinotti, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Corti, H.R. 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_13882481_v9_n7_p1444_Longinotti
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Aqueous solutions Diffusion Ferrocene methanol Micro-electrodes Super-cooled Diffusion Microelectrodes Solutions Sugar (sucrose) Supercooling Viscosity Ferrocene methanol Glass forming liquids Solution viscosity Sucrose concentration Methanol
spellingShingle	Aqueous solutions Diffusion Ferrocene methanol Micro-electrodes Super-cooled Diffusion Microelectrodes Solutions Sugar (sucrose) Supercooling Viscosity Ferrocene methanol Glass forming liquids Solution viscosity Sucrose concentration Methanol Longinotti, M.P. Corti, H.R. Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
topic_facet	Aqueous solutions Diffusion Ferrocene methanol Micro-electrodes Super-cooled Diffusion Microelectrodes Solutions Sugar (sucrose) Supercooling Viscosity Ferrocene methanol Glass forming liquids Solution viscosity Sucrose concentration Methanol
description	The diffusion of ferrocene methanol in super-cooled aqueous solutions containing sucrose has been studied, using disk and cylindrical microelectrodes, over a wide viscosity range. The solution viscosity and the reduced temperature T/Tg (Tg being the glass transition temperature) were varied by changing the sucrose concentration and the temperature of the system. The voltammetric limiting current obtained with a disk microelectrode and the i(t) response on a cylindrical microelectrode after a potential step were used to determine diffusion coefficients from 7 × 10-6 cm2 s-1 down to 2 × 10-11 cm2 s-1. The electrochemical procedure described in this work allows a simple and accurate measurement of the dynamics of electroactive solutes in glass-forming liquids. © 2007 Elsevier B.V. All rights reserved.
format	JOUR
author	Longinotti, M.P. Corti, H.R.
author_facet	Longinotti, M.P. Corti, H.R.
author_sort	Longinotti, M.P.
title	Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
title_short	Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
title_full	Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
title_fullStr	Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
title_full_unstemmed	Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
title_sort	diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes
url	http://hdl.handle.net/20.500.12110/paper_13882481_v9_n7_p1444_Longinotti
work_keys_str_mv	AT longinottimp diffusionofferrocenemethanolinsupercooledaqueoussolutionsusingcylindricalmicroelectrodes AT cortihr diffusionofferrocenemethanolinsupercooledaqueoussolutionsusingcylindricalmicroelectrodes
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Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes

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