Expanded View of NMR Spin-Lattice Relaxation in Fluorine-Containing Ionic Liquids.

ABSTRACT: Fluorine-containing anions are widely used in ionic liquids due to their unique physicochemical properties. However, the local dynamics of both cations and anions and their associated relaxation mechanisms remain incompletely understood. Here, we present a ¹H and ¹⁹F spin-lattice relaxation rate (R₁) study as a function of frequency over a broad frequency range from 30 kHz to 800 MHz for ionic liquids containing BF₄^-, PF₆^-, TFSI^-, and FSI^- anions and EMIM⁺ cation. By combining experimental R₁^H and R₁^F NMR dispersion (NMRD) profiles with relaxation models for both dipolar spin interactions and chemical shift anisotropy

SUBMITTER: de Araujo Lima E Souza G 

PROVIDER: S-EPMC12319907 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature