Citation:

Beira, MJ, Daniel CI, Almeida PL, Corvo MC, Rosatella AA, Afonso CAM, Sebastiao PJ.  2017.  1H NMR Relaxometry and Diffusometry Study of Magnetic and Non-Magnetic Ionic Liquid-Based Solutions: Co-Solvent and Temperature Effects. The Journal of Physical Chemistry B. : ACS Publications

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 non-magnetic ionic liquid-based systems. In order to evaluate the effect of a co-solvent on the super-paramagnetic properties observed for Aliquat-iron-based magnetic ionic liquids, mixtures comprising different concentrations, 1% and 10% (v/v), of DMSO-d6 were prepared and analyzed. The results suggest that, when at low concentrations, DMSO-d6 promotes more structured ionic arrangements, thus enhancing these super-paramagnetic properties. Furthermore, the analysis of temperature and water concentration effects allowed to conclude that neither one of these variables sufficiently affected the super-paramagnetic properties of the studied magnetic ionic liquids.

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