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A complete biomimetic iron-sulfur cubane redox series

Mercredi 06 avril 2022 à 14:00, Salle 445 du bâtiment 10.05, CEA-Grenoble et en visioconférence
Publié le 6 avril 2022

Liam Grunwald
Department of Chemistry and Applied Biosciences (D-CHAB), ETH Zürich, Zürich, Switzerland

Iron-sulfur cubanes are omnipresent cofactors for electron transfer in Nature and have been studied since the early 1970s. The fundamental understanding of these sites was enabled by the synthesis and characterization of small molecules with an analogous architecture as the natural [Fe4S4(SCys)4]n– site. Still, an accurate model for the most reactive so-called superreduced oxidation state was never prepared and the complete biomimetic redox series of [Fe4S4]3+/2+/1+/0 complexes was never traversed synthetically. In this work, it is demonstrated that the use of a bulky arylthiolate ligand promoting the encapsulation of potassium cations in the vicinity of the Iron-sulfur cubane allows addressing both challenges.

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Liam Grunwald est invité par Geneviève Blondin, équipe PMB