Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions

L.P.N. Rebelo, V. Najdanovic-Visak, R. Gomes De Azevedo, J.M.S.S. Esperança, M. Nunes Da Ponte, H.J.R. Guedes, Z.P. Visak, H.C. De Sousa, J. Szydlowski, J.N.C. Lopes, T.C. Cordeiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An overview of experimental and theoretical studies recently performed in the Oeiras/Lisbon laboratories is provided. Typical showcase examples of UCST demixing of ionic liquid solutions are presented and discussed. Co-solvency, pressure, and isotope effects were investigated. In order to rationalize the observed effects, a phenomenological gE-model was successfully applied, which permitted us to establish strong links between phase behavior and excess properties. Speed of propagation of ultrasound waves and densities in pure ILs as a function of temperature and pressure were determined from which several other thermodynamic properties such as compressibilities, expansivities and heat capacities, were derived. The quasi-ideality of mixtures of ILs, as judged by the small values of their excess volumes, could have been predicted by the master linear representation of their pure liquid volumes as the size of either the cation or the anion change. Research has been carried out at a broad range of pressures, typically up to 1600 bar, sometimes inside the metastable liquid region. The current study focuses on [Cnmim][PF6], [Cnmim][NTf2], and [Cnmim][BF4] where n is usually 4, but generally 2 < n < 10.
Original languageEnglish
Title of host publicationACS Symposium Series
PublisherAmerican Chemical Society
Pages270-291
Volume901
ISBN (Print)978-084123893-0
Publication statusPublished - 2005

Publication series

NameACS Symposium Series
PublisherACS
Volume901
ISSN (Print)0097-6156

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Ionic Liquids
Phase behavior
Thermodynamic properties
Liquids
Compressibility
Isotopes
Specific heat
Anions
Cations
Ultrasonics
Temperature

Cite this

Rebelo, L. P. N., Najdanovic-Visak, V., Gomes De Azevedo, R., Esperança, J. M. S. S., Nunes Da Ponte, M., Guedes, H. J. R., ... Cordeiro, T. C. (2005). Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions. In ACS Symposium Series (Vol. 901, pp. 270-291). (ACS Symposium Series; Vol. 901). American Chemical Society.
Rebelo, L.P.N. ; Najdanovic-Visak, V. ; Gomes De Azevedo, R. ; Esperança, J.M.S.S. ; Nunes Da Ponte, M. ; Guedes, H.J.R. ; Visak, Z.P. ; De Sousa, H.C. ; Szydlowski, J. ; Lopes, J.N.C. ; Cordeiro, T.C. / Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions. ACS Symposium Series. Vol. 901 American Chemical Society, 2005. pp. 270-291 (ACS Symposium Series).
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abstract = "An overview of experimental and theoretical studies recently performed in the Oeiras/Lisbon laboratories is provided. Typical showcase examples of UCST demixing of ionic liquid solutions are presented and discussed. Co-solvency, pressure, and isotope effects were investigated. In order to rationalize the observed effects, a phenomenological gE-model was successfully applied, which permitted us to establish strong links between phase behavior and excess properties. Speed of propagation of ultrasound waves and densities in pure ILs as a function of temperature and pressure were determined from which several other thermodynamic properties such as compressibilities, expansivities and heat capacities, were derived. The quasi-ideality of mixtures of ILs, as judged by the small values of their excess volumes, could have been predicted by the master linear representation of their pure liquid volumes as the size of either the cation or the anion change. Research has been carried out at a broad range of pressures, typically up to 1600 bar, sometimes inside the metastable liquid region. The current study focuses on [Cnmim][PF6], [Cnmim][NTf2], and [Cnmim][BF4] where n is usually 4, but generally 2 < n < 10.",
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Rebelo, LPN, Najdanovic-Visak, V, Gomes De Azevedo, R, Esperança, JMSS, Nunes Da Ponte, M, Guedes, HJR, Visak, ZP, De Sousa, HC, Szydlowski, J, Lopes, JNC & Cordeiro, TC 2005, Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions. in ACS Symposium Series. vol. 901, ACS Symposium Series, vol. 901, American Chemical Society, pp. 270-291.

Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions. / Rebelo, L.P.N.; Najdanovic-Visak, V.; Gomes De Azevedo, R.; Esperança, J.M.S.S.; Nunes Da Ponte, M.; Guedes, H.J.R.; Visak, Z.P.; De Sousa, H.C.; Szydlowski, J.; Lopes, J.N.C.; Cordeiro, T.C.

ACS Symposium Series. Vol. 901 American Chemical Society, 2005. p. 270-291 (ACS Symposium Series; Vol. 901).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Nunes Da Ponte, M.

AU - Guedes, H.J.R.

AU - Visak, Z.P.

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AU - Szydlowski, J.

AU - Lopes, J.N.C.

AU - Cordeiro, T.C.

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N2 - An overview of experimental and theoretical studies recently performed in the Oeiras/Lisbon laboratories is provided. Typical showcase examples of UCST demixing of ionic liquid solutions are presented and discussed. Co-solvency, pressure, and isotope effects were investigated. In order to rationalize the observed effects, a phenomenological gE-model was successfully applied, which permitted us to establish strong links between phase behavior and excess properties. Speed of propagation of ultrasound waves and densities in pure ILs as a function of temperature and pressure were determined from which several other thermodynamic properties such as compressibilities, expansivities and heat capacities, were derived. The quasi-ideality of mixtures of ILs, as judged by the small values of their excess volumes, could have been predicted by the master linear representation of their pure liquid volumes as the size of either the cation or the anion change. Research has been carried out at a broad range of pressures, typically up to 1600 bar, sometimes inside the metastable liquid region. The current study focuses on [Cnmim][PF6], [Cnmim][NTf2], and [Cnmim][BF4] where n is usually 4, but generally 2 < n < 10.

AB - An overview of experimental and theoretical studies recently performed in the Oeiras/Lisbon laboratories is provided. Typical showcase examples of UCST demixing of ionic liquid solutions are presented and discussed. Co-solvency, pressure, and isotope effects were investigated. In order to rationalize the observed effects, a phenomenological gE-model was successfully applied, which permitted us to establish strong links between phase behavior and excess properties. Speed of propagation of ultrasound waves and densities in pure ILs as a function of temperature and pressure were determined from which several other thermodynamic properties such as compressibilities, expansivities and heat capacities, were derived. The quasi-ideality of mixtures of ILs, as judged by the small values of their excess volumes, could have been predicted by the master linear representation of their pure liquid volumes as the size of either the cation or the anion change. Research has been carried out at a broad range of pressures, typically up to 1600 bar, sometimes inside the metastable liquid region. The current study focuses on [Cnmim][PF6], [Cnmim][NTf2], and [Cnmim][BF4] where n is usually 4, but generally 2 < n < 10.

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M3 - Conference contribution

SN - 978-084123893-0

VL - 901

T3 - ACS Symposium Series

SP - 270

EP - 291

BT - ACS Symposium Series

PB - American Chemical Society

ER -

Rebelo LPN, Najdanovic-Visak V, Gomes De Azevedo R, Esperança JMSS, Nunes Da Ponte M, Guedes HJR et al. Phase behavior and thermodynamic properties of ionic liquids, ionic liquid mixtures, and ionic liquid solutions. In ACS Symposium Series. Vol. 901. American Chemical Society. 2005. p. 270-291. (ACS Symposium Series).