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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todo:paper_08968446_v55_n2_p472_FernandezPrini2023-10-03T15:43:48Z Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives Fernández-Prini, R. Laura Japas, M. Marceca, E. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 |
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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 Fernández-Prini, R. Laura Japas, M. Marceca, E. 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. |
format |
JOUR |
author |
Fernández-Prini, R. Laura Japas, M. Marceca, E. |
author_facet |
Fernández-Prini, R. Laura Japas, M. Marceca, E. |
author_sort |
Fernández-Prini, R. |
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 |
url |
http://hdl.handle.net/20.500.12110/paper_08968446_v55_n2_p472_FernandezPrini |
work_keys_str_mv |
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1782028770373271552 |