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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Autores principales:	Longinotti, Maria Paula, Corti, Horacio Roberto
Publicado:	2015
Materias:	Diffusion Mixtures Organometallics Solutions Supercooling Viscosity Composition dependence Ferrocenes Glycerol-water mixtures Mass fraction Supercooled regions Glycerol
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v119_n1_p257_TrejoGonzalez 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	paper:paper_15206106_v119_n1_p257_TrejoGonzalez
record_format	dspace
spelling	paper:paper_15206106_v119_n1_p257_TrejoGonzalez2023-06-08T16:19:09Z Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions Longinotti, Maria Paula Corti, Horacio Roberto 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v119_n1_p257_TrejoGonzalez 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 Longinotti, Maria Paula Corti, Horacio Roberto 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.
author	Longinotti, Maria Paula Corti, Horacio Roberto
author_facet	Longinotti, Maria Paula Corti, Horacio Roberto
author_sort	Longinotti, Maria Paula
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
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v119_n1_p257_TrejoGonzalez http://hdl.handle.net/20.500.12110/paper_15206106_v119_n1_p257_TrejoGonzalez
work_keys_str_mv	AT longinottimariapaula diffusionviscositydecouplinginsupercooledglycerolaqueoussolutions AT cortihoracioroberto diffusionviscositydecouplinginsupercooledglycerolaqueoussolutions
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Diffusion-viscosity decoupling in supercooled glycerol aqueous solutions

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