Molecular Mobility in a Set of Imidazolium-Based Ionic Liquids [bmim] + A - by the NMR-Relaxation Method

Sergei S. Bystrov, Vladimir V. Matveev, Yurii S. Chernyshev, Vytautas Balevičius, Vladimir I. Chizhik

Research output

4 Citations (Scopus)

Abstract

The detailed investigation of the local mobility in a set of dried imidazolium-based ionic liquids (1-butyl-3-methylimidazolium) in a wide temperature range and varying anions (BF 4 - , I - , Cl - , Br - , NO 3 - , TfO - ) is presented. The measurements of temperature dependencies of the spin-lattice relaxation times of 1 H and 13 C nuclei are motivated by the need to obtain a fundamental characterization of molecular mobility of the substances under study, namely, to estimate the correlation times, τ c , for the motion of individual molecular groups. In particular, it follows from obtained results that the mobility of the hydrocarbon "tail" is higher (smaller τ c ) than that of the imidazole ring, and this expected tendency is quantified. The effect of the influence of an anion type on the cation mobility is also analyzed.

Original languageEnglish
Pages (from-to)2362-2372
Number of pages11
JournalJournal of Physical Chemistry B
Volume123
Issue number10
DOIs
Publication statusPublished - 14 Mar 2019

Scopus subject areas

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

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