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Probing ionic liquid electrolyte structure via the glassy state by dynamic nuclear polarization NMR spectroscopy

journal contribution
posted on 01.03.2018, 00:00 authored by Marc-Antoine Sani, Pierre-Alexandre Martin, Ruhamah Yunis, Fangfang ChenFangfang Chen, Maria ForsythMaria Forsyth, Michaël Deschamps, Luke O'DellLuke O'Dell
Dynamic nuclear polarization (DNP)-enhanced solid-state NMR spectroscopy has been used to study an ionic liquid salt solution (N-methyl-N-propyl-pyrrolidinium bis(fluorosulfonyl)imide, C3mpyrFSI, containing 1.0 m lithium bis(fluorosulfonyl)imide, 6LiFSI) in its glassy state at a temperature of 92 K. The incorporation of a biradical to enable DNP signal enhancement allowed the proximities of the lithium to the individual carbon sites on the pyrrolidinium cation to be probed using a 13C-6Li REDOR pulse sequence. Distributions in Li-C distances were extracted and converted into a 3D map of the locations of the Li+ relative to the C3mpyr that shows remarkably good agreement with a liquid-phase molecular dynamics simulation.

History

Journal

Journal of physical chemistry letters

Volume

9

Issue

5

Pagination

1007 - 1011

Publisher

American Chemical Society

Location

Washington, D.C.

eISSN

1948-7185

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, American Chemical Society