Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives

Partial molar properties of dilute solutes in near-critical solvents exhibit a strong dependence on temperature and density which hinders the description of their behaviour under those conditions. We used the well-behaved Krichevskii function, J = (dp/dx)V,T supra infinity, to describe that region o...

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Autores principales:	Fernandez Prini, Roberto, Japas, María Laura, Marceca, Ernesto Jose
Publicado:	2010
Materias:	Critical behaviour Intermolecular interactions Krichevskii's function Near-critical solvents Solvation Continuous exploration Critical solution Density dependence Dilute solution Partial molar properties Super-critical Supercritical solvents Ternary solution Phase transitions Ternary systems Solvents
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08968446_v55_n2_p472_FernandezPrini http://hdl.handle.net/20.500.12110/paper_08968446_v55_n2_p472_FernandezPrini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08968446_v55_n2_p472_FernandezPrini
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spelling	paper:paper_08968446_v55_n2_p472_FernandezPrini2023-06-08T15:49:14Z Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives Fernandez Prini, Roberto Japas, María Laura Marceca, Ernesto Jose Critical behaviour Intermolecular interactions Krichevskii's function Near-critical solvents Solvation Continuous exploration Critical behaviour Critical solution Density dependence Dilute solution Intermolecular interactions Krichevskii's function Near-critical solvents Partial molar properties Super-critical Supercritical solvents Ternary solution Phase transitions Solvation Ternary systems Solvents Partial molar properties of dilute solutes in near-critical solvents exhibit a strong dependence on temperature and density which hinders the description of their behaviour under those conditions. We used the well-behaved Krichevskii function, J = (dp/dx)V,T supra infinity, to describe that region of the thermodynamic space, and have extended its use to ternary solutions (two solutes + one near-critical solvent) successfully. The use of supercritical solvents permits a controlled and continuous exploration of the density dependence of solutes' properties without undergoing phase transitions, hence the availability of a non-diverging property like J to describe the systems is greatly important. We show its application for binary and ternary systems that have been studied and also give some information about the molecular structure of near-critical solutions. This knowledge provides a better understanding about solvation and its dependence on long-range (critical) fluctuations in the presence of intermolecular interactions. © 2010 Published by Elsevier B.V. Fil:Fernández-Prini, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Laura Japas, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marceca, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08968446_v55_n2_p472_FernandezPrini http://hdl.handle.net/20.500.12110/paper_08968446_v55_n2_p472_FernandezPrini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Critical behaviour Intermolecular interactions Krichevskii's function Near-critical solvents Solvation Continuous exploration Critical behaviour Critical solution Density dependence Dilute solution Intermolecular interactions Krichevskii's function Near-critical solvents Partial molar properties Super-critical Supercritical solvents Ternary solution Phase transitions Solvation Ternary systems Solvents
spellingShingle	Critical behaviour Intermolecular interactions Krichevskii's function Near-critical solvents Solvation Continuous exploration Critical behaviour Critical solution Density dependence Dilute solution Intermolecular interactions Krichevskii's function Near-critical solvents Partial molar properties Super-critical Supercritical solvents Ternary solution Phase transitions Solvation Ternary systems Solvents Fernandez Prini, Roberto Japas, María Laura Marceca, Ernesto Jose Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
topic_facet	Critical behaviour Intermolecular interactions Krichevskii's function Near-critical solvents Solvation Continuous exploration Critical behaviour Critical solution Density dependence Dilute solution Intermolecular interactions Krichevskii's function Near-critical solvents Partial molar properties Super-critical Supercritical solvents Ternary solution Phase transitions Solvation Ternary systems Solvents
description	Partial molar properties of dilute solutes in near-critical solvents exhibit a strong dependence on temperature and density which hinders the description of their behaviour under those conditions. We used the well-behaved Krichevskii function, J = (dp/dx)V,T supra infinity, to describe that region of the thermodynamic space, and have extended its use to ternary solutions (two solutes + one near-critical solvent) successfully. The use of supercritical solvents permits a controlled and continuous exploration of the density dependence of solutes' properties without undergoing phase transitions, hence the availability of a non-diverging property like J to describe the systems is greatly important. We show its application for binary and ternary systems that have been studied and also give some information about the molecular structure of near-critical solutions. This knowledge provides a better understanding about solvation and its dependence on long-range (critical) fluctuations in the presence of intermolecular interactions. © 2010 Published by Elsevier B.V.
author	Fernandez Prini, Roberto Japas, María Laura Marceca, Ernesto Jose
author_facet	Fernandez Prini, Roberto Japas, María Laura Marceca, Ernesto Jose
author_sort	Fernandez Prini, Roberto
title	Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
title_short	Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
title_full	Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
title_fullStr	Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
title_full_unstemmed	Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
title_sort	near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
publishDate	2010
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08968446_v55_n2_p472_FernandezPrini http://hdl.handle.net/20.500.12110/paper_08968446_v55_n2_p472_FernandezPrini
work_keys_str_mv	AT fernandezpriniroberto nearcriticalandsupercriticaldilutesolutionsviewedfrommacroscopicandmolecularscaleperspectives AT japasmarialaura nearcriticalandsupercriticaldilutesolutionsviewedfrommacroscopicandmolecularscaleperspectives AT marcecaernestojose nearcriticalandsupercriticaldilutesolutionsviewedfrommacroscopicandmolecularscaleperspectives
_version_	1768544187175665664

Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives

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