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Keywords:

  • ion spectroscopy;
  • mass spectrometry;
  • microsolvation;
  • photoionization;
  • radiation damage
Thumbnail image of graphical abstract

A dash of water: Nanosolvation of a leucine–enkephalin peptide dimer by only three water molecules has a dramatic impact on its stability to VUV photon irradiation. A drastic reduction of the fragmentation abundance of the hydrated protonated peptide dimer precursor, isolated in the gas phase, was observed. Calculations show that hydration in fact stabilizes the dimer structure.