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Keywords:

  • 2D correlation;
  • analytical methods;
  • dynamic nuclear polarization;
  • natural abundance;
  • NMR spectroscopy
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Ultra-fast: Substantial solid-state NMR sensitivity can be achieved using dynamic nuclear polarization and matrix-free sample preparation (that is, absence of solvent and cryoprotectant). This method avoids line-broadening, maximizes sample filling factor, and allows natural-abundance 2D 13C–13C dipolar correlation experiments to be carried out in tens of minutes. MW=microwaves.