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Keywords:

  • dioxygen activation;
  • iron complexes;
  • peroxo intermediates;
  • photoreduction;
  • ruthenium complexes
Thumbnail image of graphical abstract

Closing the loop: Light absorption by a sensitizer–diiron(III) complex in the presence of a sacrificial electron donor and subsequent exposure to O2 led to the formation of the corresponding active diiron(III)–peroxo species, which can transfer an oxygen atom to a substrate (see scheme).