Influence of the Electric Charge of Spin Probes on Their Diffusion in Room-Temperature Ionic Liquids

B. Y.Mladenova Kattnig*, N. A. Chumakova, D. R. Kattnig, I. A. Grigor'Ev, G. Grampp, A. I. Kokorin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The rotational and translational diffusion of negatively charged and uncharged spin probes in five imidazolium-based room-temperature ionic liquids (RTILs), 1-ethyl-3-methylimidazolium tetrafluoroborate, emimBF4, 1-butyl-3-methylimidazolium tetrafluoroborate, bmimBF4, 1-octyl-3-methylimidazolium tetrafluoroborate, omimBF4, 1-octyl-3-methylimidazolium hexafluorophosphate, omimPF6, and 1-octyl-3-methylimidazolium chloride, omimCl, has been studied by means of electron paramagnetic resonance spectroscopy. Detailed analyses of the spin-Hamiltonian parameters and spin exchange interactions have been carried out. The temperature dependences of the line broadening induced by the electronic dipole-dipole interaction and the electron spin exchange coupling are determined. The translational mobility of spin probes is semiquantitatively characterized and successfully explained in the framework of a hypothesis based on the assumption of polar and unpolar domains within the RTILs.

Original languageEnglish
Pages (from-to)9235-9243
Number of pages9
JournalJournal of Physical Chemistry B
Issue number32
Publication statusPublished - 19 Aug 2021

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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