Investigation of dynamics in BMIM TFSA ionic liquid through variable temperature and pressure NMR relaxometry and diffusometry.

ABSTRACT: A comprehensive variable temperature, pressure and frequency multinuclear (¹H, ²H, and ¹⁹F) magnetic resonance study was undertaken on selectively deuterated 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide (BMIM TFSA) ionic liquid isotopologues. This study builds on our earlier investigation of the effects of increasing alkyl chain length on diffusion and dynamics in imidazolium-based TFSA ionic liquids. Fast field cycling ¹H T₁ data revealed multiple modes of motion. Through calculation of diffusion coefficient (D) values and activation energies, the low- and high-field regimes were assigned to the translational and reorientation dynamics respectively. Variable-pressure ²H T₁ measurements reveal sit

SUBMITTER: Pilar K 

PROVIDER: S-EPMC6052354 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature