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Relaxational dynamics in the PYR14-IM14 ionic liquid by mechanical spectroscopy

TitleRelaxational dynamics in the PYR14-IM14 ionic liquid by mechanical spectroscopy
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2018
AuthorsPaolone, A., Palumbo O., Trequattrini F., and Appetecchi Giovanni Battista
JournalMaterials Research
KeywordsConformers, Dynamics, Glass transition, Ion hopping, Ionic liquids, Liquid Phase, Mechanical spectroscopy, Modified debye models, Pyrrolidinium, Relaxational dynamics, Thermally activated

The anelastic spectrum of the N-butyl-N-methyl-pyrrolidinium (trifluoromethanesulfonyl) (nonafluorobutanesulfonyl)imide (PYR14-IM14) is reported for the first time. On cooling, at 4 Kmin-1 the sample undergoes a glass transition around 190 K. In the liquid phase, a thermally activated relaxation process is measured and it is analyzed by means of a modified Debye model. The best fit results indicate that the peak is related to the ion hopping between non-equivalent configurations which are mainly defined by the anion conformer configuration. © 2018 Universidade Federal de Sao Carlos. All rights reserved.


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Citation KeyPaolone2018