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Keywords:

  • epoxidation;
  • fluorescence probes;
  • reaction dynamics;
  • single-molecule spectroscopy
Thumbnail image of graphical abstract

Focus on chemical transitions: Epoxidation of a double bond in conjugation to a fluorescent dye was studied at single-molecule level. Direct observation of oxirane formation, indicated as a spectral shift from substrate to product state, revealed an alternative reaction pathway for the epoxidation reaction.