The intermolecular interactions in a hybrid electrolyte based on various compositions of the ionic liquid N-methyl-N-propyl pyrrolidinium bis-fluorosulfonylimide (C3mpyrFSI), LiFSI salt and an ether-based additive, 1,2-dimethoxy ethane (DME), have been investigated using the HOESY (Heteronuclear Overhauser Effect SpectroscopY) NMR experiment. This NMR technique allows a quantification of the intermolecular interactions in ionic liquids (ILs) by measuring the cross-relaxation rate (σ) between different pairs of nuclei. Thereby, we compare the cross-relaxation rates between the cations, anions and DME in these hybrid electrolyte systems using 1H-7sLi and 1H-19F HOESY experiments, and interpret the measured parameters in terms of ionic and molecular associations. The results give insights into the local coordination environment of the Li+ cations and their solvation by the FSI anions and DME.
CITATION STYLE
Gyabeng, D., Martin, P. A., Pal, U., Deschamps, M., Forsyth, M., & O’Dell, L. A. (2019). Investigating intermolecular interactions in a DME-based hybrid ionic liquid electrolyte by HOESY NMR. Frontiers in Chemistry, 7(JAN). https://doi.org/10.3389/fchem.2019.00004
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