1H NMR Relaxometry and Diffusometry Study of Magnetic and Nonmagnetic Ionic Liquid-Based Solutions

Cosolvent and Temperature Effects

Maria Beira, Carla I. Daniel, Pedro L. Almeida, Marta C. Corvo, Andreia A. Rosatella, Carlos A.M. Afonso, Pedro J. Sebastião

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this work, 1H NMR relaxometry and diffusometry as well as viscometry experiments were carried out as a means to study the molecular dynamics of magnetic and nonmagnetic ionic liquid-based systems. In order to evaluate the effect of a cosolvent on the superparamagnetic properties observed for Aliquat-iron-based magnetic ionic liquids, mixtures comprising different concentrations, 1% and 10% (v/v), of DMSO-d6 were prepared and studied. The results for both magnetic and nonmagnetic systems were consistently analyzed an suggest that, when at low concentrations, DMSO-d6 promotes more structured ionic arrangements, thus enhancing these superparamagnetic properties. Furthermore, the analysis of temperature and water concentration effects allowed to conclude that neither one of these variables significantly affected the superparamagnetic properties of the studied magnetic ionic liquids.

Original languageEnglish
Pages (from-to)11472-11484
Number of pages13
JournalJournal of Physical Chemistry B
Volume121
Issue number51
DOIs
Publication statusPublished - 2017

Fingerprint

Ionic Liquids
Ionic liquids
Thermal effects
temperature effects
Nuclear magnetic resonance
Dimethyl Sulfoxide
nuclear magnetic resonance
liquids
viscometry
Viscosity measurement
Molecular dynamics
low concentrations
Iron
molecular dynamics
iron
Water
water
Experiments
Temperature
temperature

Keywords

  • Ionic liquids
  • Liquids
  • Magnetism
  • Molecular dynamics
  • Paramagnetism

Cite this

Beira, Maria ; Daniel, Carla I. ; Almeida, Pedro L. ; Corvo, Marta C. ; Rosatella, Andreia A. ; Afonso, Carlos A.M. ; Sebastião, Pedro J. / 1H NMR Relaxometry and Diffusometry Study of Magnetic and Nonmagnetic Ionic Liquid-Based Solutions : Cosolvent and Temperature Effects. In: Journal of Physical Chemistry B. 2017 ; Vol. 121, No. 51. pp. 11472-11484.
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abstract = "In this work, 1H NMR relaxometry and diffusometry as well as viscometry experiments were carried out as a means to study the molecular dynamics of magnetic and nonmagnetic ionic liquid-based systems. In order to evaluate the effect of a cosolvent on the superparamagnetic properties observed for Aliquat-iron-based magnetic ionic liquids, mixtures comprising different concentrations, 1{\%} and 10{\%} (v/v), of DMSO-d6 were prepared and studied. The results for both magnetic and nonmagnetic systems were consistently analyzed an suggest that, when at low concentrations, DMSO-d6 promotes more structured ionic arrangements, thus enhancing these superparamagnetic properties. Furthermore, the analysis of temperature and water concentration effects allowed to conclude that neither one of these variables significantly affected the superparamagnetic properties of the studied magnetic ionic liquids.",
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author = "Maria Beira and Daniel, {Carla I.} and Almeida, {Pedro L.} and Corvo, {Marta C.} and Rosatella, {Andreia A.} and Afonso, {Carlos A.M.} and Sebasti{\~a}o, {Pedro J.}",
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1H NMR Relaxometry and Diffusometry Study of Magnetic and Nonmagnetic Ionic Liquid-Based Solutions : Cosolvent and Temperature Effects. / Beira, Maria; Daniel, Carla I.; Almeida, Pedro L.; Corvo, Marta C.; Rosatella, Andreia A.; Afonso, Carlos A.M.; Sebastião, Pedro J.

In: Journal of Physical Chemistry B, Vol. 121, No. 51, 2017, p. 11472-11484.

Research output: Contribution to journalArticle

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T1 - 1H NMR Relaxometry and Diffusometry Study of Magnetic and Nonmagnetic Ionic Liquid-Based Solutions

T2 - Cosolvent and Temperature Effects

AU - Beira, Maria

AU - Daniel, Carla I.

AU - Almeida, Pedro L.

AU - Corvo, Marta C.

AU - Rosatella, Andreia A.

AU - Afonso, Carlos A.M.

AU - Sebastião, Pedro J.

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Y1 - 2017

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