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Abstract:

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.

Registro:

Documento: Artículo
Título:Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives
Autor:Fernández-Prini, R.; Laura Japas, M.; Marceca, E.
Filiación:INQUIMAE/DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, 1428 Buenos Aires, Argentina
Gerencia Química, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429 Buenos Aires, Argentina
Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen 3100, 1650 San Martín, Prov. Buenos Aires, Argentina
Palabras clave: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
Año:2010
Volumen:55
Número:2
Página de inicio:472
Página de fin:478
DOI: http://dx.doi.org/10.1016/j.supflu.2010.10.009
Título revista:Journal of Supercritical Fluids
Título revista abreviado:J. Supercritical Fluids
ISSN:08968446
CODEN:JSFLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08968446_v55_n2_p472_FernandezPrini

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Citas:

---------- APA ----------
Fernández-Prini, R., Laura Japas, M. & Marceca, E. (2010) . Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives. Journal of Supercritical Fluids, 55(2), 472-478.
http://dx.doi.org/10.1016/j.supflu.2010.10.009
---------- CHICAGO ----------
Fernández-Prini, R., Laura Japas, M., Marceca, E. "Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives" . Journal of Supercritical Fluids 55, no. 2 (2010) : 472-478.
http://dx.doi.org/10.1016/j.supflu.2010.10.009
---------- MLA ----------
Fernández-Prini, R., Laura Japas, M., Marceca, E. "Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives" . Journal of Supercritical Fluids, vol. 55, no. 2, 2010, pp. 472-478.
http://dx.doi.org/10.1016/j.supflu.2010.10.009
---------- VANCOUVER ----------
Fernández-Prini, R., Laura Japas, M., Marceca, E. Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives. J. Supercritical Fluids. 2010;55(2):472-478.
http://dx.doi.org/10.1016/j.supflu.2010.10.009