Author

Régis Guillot

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Open access Sep 2026

Metal–Ligand Cooperative Control of Reactivity in a Porphyrin Manganese(IV)–Oxo–Phenoxyl Radical Complex for Water Activation

The Oxygen Evolving Complex (OEC) is a Mn4Ca cluster at the heart of Photosystem II that catalyzes the water oxidation reaction. Recent studies suggest the formation of a Mn(IV)‐oxyl species in the OEC, accompanied by a nonbonded tyrosinyl radical in the S3′ state, prior to O─O bond formation and O2 release. In this st...

Adelais Trapali, Rong Lin, Georgios Charalambidis et al. · ChemistryEurope · 0 citations

Open access Aug 2026

Diversification of the Avarane Skeleton Toward Spiroetherone A

Studies toward spiroetherone A uncovered an unexpectedly rich reactivity landscape within the avarane skeleton. An intramolecular Michael addition onto a quinone enabled access to the characteristic spiroenedione core of the natural product. Alongside this transformation, diverse and unanticipated reaction pathways eme...

Guillaume Schoenn, Régis Guillot, C. Kouklovsky et al. · ChemistryEurope · 0 citations

Open access Sep 2026

Direct Observation of a Hydrogen-Bonding Assisted Quasi-Reversible Superoxo/Peroxo Interconversion in a Heme Model.

The activation and reduction of molecular oxygen at transition metal centers are central to both enzymatic catalysis and energy conversion. Here, we report the first direct observation of a hydrogen-bonding-assisted, quasi-reversible superoxo (FeIII─O2˙-)/peroxo (FeIII─O2 2-) redox couple in a heme model complex using...

Adelais Trapali, Régis Guillot, Christian Herrero et al. · Chemistry · 0 citations