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Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems

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Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems. / Najdanovic-Visak, Vesna; Esperanca, JMSS; Rebelo, LPN; da Ponte, MN; Guedes, HJR; Seddon, Kenneth R.; de Sousa, HC; Szydlowski, J.

In: Journal of Physical Chemistry B, Vol. 107, No. 46, 20.11.2003, p. 12797-12807.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Najdanovic-Visak, V, Esperanca, JMSS, Rebelo, LPN, da Ponte, MN, Guedes, HJR, Seddon, KR, de Sousa, HC & Szydlowski, J 2003, 'Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems', Journal of Physical Chemistry B, vol. 107, no. 46, pp. 12797-12807. https://doi.org/10.1021/jp034576x

APA

Najdanovic-Visak, V., Esperanca, JMSS., Rebelo, LPN., da Ponte, MN., Guedes, HJR., Seddon, K. R., de Sousa, HC., & Szydlowski, J. (2003). Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems. Journal of Physical Chemistry B, 107(46), 12797-12807. https://doi.org/10.1021/jp034576x

Vancouver

Najdanovic-Visak V, Esperanca JMSS, Rebelo LPN, da Ponte MN, Guedes HJR, Seddon KR et al. Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems. Journal of Physical Chemistry B. 2003 Nov 20;107(46):12797-12807. https://doi.org/10.1021/jp034576x

Author

Najdanovic-Visak, Vesna ; Esperanca, JMSS ; Rebelo, LPN ; da Ponte, MN ; Guedes, HJR ; Seddon, Kenneth R. ; de Sousa, HC ; Szydlowski, J. / Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems. In: Journal of Physical Chemistry B. 2003 ; Vol. 107, No. 46. pp. 12797-12807.

Bibtex

@article{504a3bbbbe9f48939b8c81c11b5a732e,
title = "Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems",
abstract = "Liquid-liquid phase splitting in ternary mixtures that contain a room-temperature ionic liquid and an alcohol aqueous solution-namely, [bmim] [PF6] + ethanol + water and [bmim] [NTf2] + 2-methylpropanol + water-is studied. Experimental cloud-point temperatures were obtained up to pressures of 400 bar, using a He-Ne laser light-scattering technique. Although pressurization favors mutual miscibility in the presence of high concentrations of alcohols, the contrary occurs in water-rich solutions. Both ternary mixtures exhibit a very pronounced water-alcohol co-solvent effect. Solvent isotope effects are also investigated. Phase diagrams are discussed using a phenomenological approach based on a {"}polymer-like{"} G(E) model coupled with the statistical-mechanical theory of isotope effects. The combined effect of a red shift of -15 cm(-1) for the O-H deformation mode of ethanol with a blue shift of +35 cm(-1) for the O-H stretching mode, both of which occurring after liquid infinite dilution in the ionic liquid, rationalizes the observed isotope effect in the phase diagram. Predicted excess enthalpy (H-E) values are inferred from the model parameters. Furthermore, using the Prigogine-Defay equation, an estimation of the excess volumes (V-E) is obtained.",
keywords = "BUTAN-1-OL, POLYSTYRENE, SOLVENTS, ETHANOL, PHASE-EQUILIBRIA, BEHAVIOR, THERMODYNAMIC PROPERTIES, 1-N-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE, VAPOR-PRESSURE, DEPENDENCE",
author = "Vesna Najdanovic-Visak and JMSS Esperanca and LPN Rebelo and {da Ponte}, MN and HJR Guedes and Seddon, {Kenneth R.} and {de Sousa}, HC and J Szydlowski",
year = "2003",
month = nov,
day = "20",
doi = "10.1021/jp034576x",
language = "English",
volume = "107",
pages = "12797--12807",
journal = "Journal of Physical Chemistry B",
issn = "1520-6106",
publisher = "AMER CHEMICAL SOC",
number = "46",

}

RIS

TY - JOUR

T1 - Pressure, isotope, and water co-solvent effects in liquid-liquid equilibria of (ionic liquid plus alcohol) systems

AU - Najdanovic-Visak, Vesna

AU - Esperanca, JMSS

AU - Rebelo, LPN

AU - da Ponte, MN

AU - Guedes, HJR

AU - Seddon, Kenneth R.

AU - de Sousa, HC

AU - Szydlowski, J

PY - 2003/11/20

Y1 - 2003/11/20

N2 - Liquid-liquid phase splitting in ternary mixtures that contain a room-temperature ionic liquid and an alcohol aqueous solution-namely, [bmim] [PF6] + ethanol + water and [bmim] [NTf2] + 2-methylpropanol + water-is studied. Experimental cloud-point temperatures were obtained up to pressures of 400 bar, using a He-Ne laser light-scattering technique. Although pressurization favors mutual miscibility in the presence of high concentrations of alcohols, the contrary occurs in water-rich solutions. Both ternary mixtures exhibit a very pronounced water-alcohol co-solvent effect. Solvent isotope effects are also investigated. Phase diagrams are discussed using a phenomenological approach based on a "polymer-like" G(E) model coupled with the statistical-mechanical theory of isotope effects. The combined effect of a red shift of -15 cm(-1) for the O-H deformation mode of ethanol with a blue shift of +35 cm(-1) for the O-H stretching mode, both of which occurring after liquid infinite dilution in the ionic liquid, rationalizes the observed isotope effect in the phase diagram. Predicted excess enthalpy (H-E) values are inferred from the model parameters. Furthermore, using the Prigogine-Defay equation, an estimation of the excess volumes (V-E) is obtained.

AB - Liquid-liquid phase splitting in ternary mixtures that contain a room-temperature ionic liquid and an alcohol aqueous solution-namely, [bmim] [PF6] + ethanol + water and [bmim] [NTf2] + 2-methylpropanol + water-is studied. Experimental cloud-point temperatures were obtained up to pressures of 400 bar, using a He-Ne laser light-scattering technique. Although pressurization favors mutual miscibility in the presence of high concentrations of alcohols, the contrary occurs in water-rich solutions. Both ternary mixtures exhibit a very pronounced water-alcohol co-solvent effect. Solvent isotope effects are also investigated. Phase diagrams are discussed using a phenomenological approach based on a "polymer-like" G(E) model coupled with the statistical-mechanical theory of isotope effects. The combined effect of a red shift of -15 cm(-1) for the O-H deformation mode of ethanol with a blue shift of +35 cm(-1) for the O-H stretching mode, both of which occurring after liquid infinite dilution in the ionic liquid, rationalizes the observed isotope effect in the phase diagram. Predicted excess enthalpy (H-E) values are inferred from the model parameters. Furthermore, using the Prigogine-Defay equation, an estimation of the excess volumes (V-E) is obtained.

KW - BUTAN-1-OL

KW - POLYSTYRENE

KW - SOLVENTS

KW - ETHANOL

KW - PHASE-EQUILIBRIA

KW - BEHAVIOR

KW - THERMODYNAMIC PROPERTIES

KW - 1-N-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUOROPHOSPHATE

KW - VAPOR-PRESSURE

KW - DEPENDENCE

U2 - 10.1021/jp034576x

DO - 10.1021/jp034576x

M3 - Journal article

VL - 107

SP - 12797

EP - 12807

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

SN - 1520-6106

IS - 46

ER -