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Keywords:

  • ionic liquids;
  • molecular dynamics;
  • NMR spectroscopy;
  • nuclear Overhauser effect
Thumbnail image of graphical abstract

Frequency-dependent NOE: A new model theory was used to analyze the spatial range of the intermolecular nuclear Overhauser effect in ionic liquids. The spatial range undergoes a transition from long-range nature at low frequency to a short-range character at high frequencies. The experimentally accessible cross-relaxation rate involves contributions from both regimes, but the long-range component dominates.