Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions

The diffusion of ferrocene methanol in supercooled glycerol-water mixtures has been measured over a wide viscosity range, which allowed analyzing the composition dependence of the Stokes-Einstein breakdown (diffusion-viscosity decoupling). The observed decoupling exhibits a common behavior for all s...

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Detalles Bibliográficos
Autores principales:	Trejo González, J.A., Longinotti, M.P., Corti, H.R.
Formato:	JOUR
Materias:	Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_15206106_v119_n1_p257_TrejoGonzalez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_15206106_v119_n1_p257_TrejoGonzalez
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spelling	todo:paper_15206106_v119_n1_p257_TrejoGonzalez2023-10-03T16:20:29Z Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions Trejo González, J.A. Longinotti, M.P. Corti, H.R. Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol The diffusion of ferrocene methanol in supercooled glycerol-water mixtures has been measured over a wide viscosity range, which allowed analyzing the composition dependence of the Stokes-Einstein breakdown (diffusion-viscosity decoupling). The observed decoupling exhibits a common behavior for all studied compositions (glycerol mass fractions between 0.7 and 0.9), determined by the reduced temperature (T/Tg) of the mixtures. This result differs from that reported previously for the diffusion of glycerol in its aqueous solutions, where the reduced temperature for the decoupling decreases with increasing water content. We conclude that the contradictory results are only apparent, and they can be explained by the use of inconsistent extrapolated values of the viscosity of the glycerol-water mixtures in the supercooled region. (Figure Presented). © 2014 American Chemical Society. 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_15206106_v119_n1_p257_TrejoGonzalez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol
spellingShingle	Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol Trejo González, J.A. Longinotti, M.P. Corti, H.R. Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
topic_facet	Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol
description	The diffusion of ferrocene methanol in supercooled glycerol-water mixtures has been measured over a wide viscosity range, which allowed analyzing the composition dependence of the Stokes-Einstein breakdown (diffusion-viscosity decoupling). The observed decoupling exhibits a common behavior for all studied compositions (glycerol mass fractions between 0.7 and 0.9), determined by the reduced temperature (T/Tg) of the mixtures. This result differs from that reported previously for the diffusion of glycerol in its aqueous solutions, where the reduced temperature for the decoupling decreases with increasing water content. We conclude that the contradictory results are only apparent, and they can be explained by the use of inconsistent extrapolated values of the viscosity of the glycerol-water mixtures in the supercooled region. (Figure Presented). © 2014 American Chemical Society.
format	JOUR
author	Trejo González, J.A. Longinotti, M.P. Corti, H.R.
author_facet	Trejo González, J.A. Longinotti, M.P. Corti, H.R.
author_sort	Trejo González, J.A.
title	Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
title_short	Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
title_full	Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
title_fullStr	Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
title_full_unstemmed	Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
title_sort	diffusion-viscosity decoupling in supercooled glycerol aqueous solutions
url	http://hdl.handle.net/20.500.12110/paper_15206106_v119_n1_p257_TrejoGonzalez
work_keys_str_mv	AT trejogonzalezja diffusionviscositydecouplinginsupercooledglycerolaqueoussolutions AT longinottimp diffusionviscositydecouplinginsupercooledglycerolaqueoussolutions AT cortihr diffusionviscositydecouplinginsupercooledglycerolaqueoussolutions
_version_	1807320479347769344

Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions

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