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Keywords:

  • diffusion;
  • mesoporous materials;
  • NMR spectroscopy;
  • single-molecule studies
Thumbnail image of graphical abstract

To prove the ergodic theorem experimentally the diffusivities of guest molecules inside a nanostructured porous glass were measured by using two conceptually different approaches under identical conditions. The data obtained through the direct observation of dye-molecule diffusion by single-molecule tracking experiments (red circles) was in perfect agreement with the ensemble value obtained in pulsed-field gradient NMR experiments (black squares).