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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Autor principal: Fernández-Prini, R.
Otros Autores: Laura Japas, M., Marceca, E.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2010
Acceso en línea:Registro en Scopus
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100 1 |a Fernández-Prini, R. 
245 1 0 |a Near-critical and supercritical dilute solutions viewed from macroscopic and molecular-scale perspectives 
260 |c 2010 
270 1 0 |m Fernández-Prini, R.; Gerencia Química, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429 Buenos Aires, Argentina; email: rfprini@cnea.gov.ar 
506 |2 openaire  |e Política editorial 
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504 |a Sciaini, G., Fernández-Prini, R., Estrín, D., Marceca, E., Short-range and long-range solvent effects on charge-transfer-to-solvent transitions of I- and K+I- contact pair dissolved in supercritical NH3 (2007) J. Chemical Physics, 126, p. 174504 
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520 3 |a 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.  |l eng 
536 |a Detalles de la financiación: Secretaría de Ciencia y Técnica, Universidad de Buenos Aires, X128-X330 
536 |a Detalles de la financiación: EM and RFP thank partial financial support from UBACyT X128-X330. We thank Dionysis Foustoukos for providing the complete data set from Ref. [29] , as shown in Fig. 2 . EM and RFP are members of the Carrera del Investigador, CONICET (Argentina). 
593 |a INQUIMAE/DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, 1428 Buenos Aires, Argentina 
593 |a Gerencia Química, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429 Buenos Aires, Argentina 
593 |a Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen 3100, 1650 San Martín, Prov. Buenos Aires, Argentina 
690 1 0 |a CRITICAL BEHAVIOUR 
690 1 0 |a INTERMOLECULAR INTERACTIONS 
690 1 0 |a KRICHEVSKII'S FUNCTION 
690 1 0 |a NEAR-CRITICAL SOLVENTS 
690 1 0 |a SOLVATION 
690 1 0 |a CONTINUOUS EXPLORATION 
690 1 0 |a CRITICAL BEHAVIOUR 
690 1 0 |a CRITICAL SOLUTION 
690 1 0 |a DENSITY DEPENDENCE 
690 1 0 |a DILUTE SOLUTION 
690 1 0 |a INTERMOLECULAR INTERACTIONS 
690 1 0 |a KRICHEVSKII'S FUNCTION 
690 1 0 |a NEAR-CRITICAL SOLVENTS 
690 1 0 |a PARTIAL MOLAR PROPERTIES 
690 1 0 |a SUPER-CRITICAL 
690 1 0 |a SUPERCRITICAL SOLVENTS 
690 1 0 |a TERNARY SOLUTION 
690 1 0 |a PHASE TRANSITIONS 
690 1 0 |a SOLVATION 
690 1 0 |a TERNARY SYSTEMS 
690 1 0 |a SOLVENTS 
700 1 |a Laura Japas, M. 
700 1 |a Marceca, E. 
773 0 |d 2010  |g v. 55  |h pp. 472-478  |k n. 2  |p J. Supercritical Fluids  |x 08968446  |w (AR-BaUEN)CENRE-5809  |t Journal of Supercritical Fluids 
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