Antimony–Oxo Porphyrins as Photocatalysts for Redox-Neutral C–H to C–C Bond Conversion
Luca Capaldo, Martin Ertl, Maurizio Fagnoni, Günther Knör, Davide Ravelli
Abstract
center remains in a high-valent oxidation state, serving uniquely to carry the oxo moiety and activate the coordinated ligands. This porphyrin-based system has been exploited upon irradiation to catalyze C-H to C-C bond conversion via the addition of hydrogen donors (ethers and aldehydes) onto Michael acceptors in a redox-neutral fashion without the need of any external oxidant. Laser flash photolysis experiments confirmed that the triplet excited state of the photocatalyst triggers the desired C-H cleavage.
Topics & Concepts
PhotochemistryChemistryMoietyRedoxPorphyrinExcited stateAntimonyFlash photolysisCatalysisBond cleavagePhotocatalysisHydrogen atomTriplet stateStereochemistryInorganic chemistryKineticsMoleculeOrganic chemistryQuantum mechanicsReaction rate constantAlkylPhysicsNuclear physicsCO2 Reduction Techniques and CatalystsPorphyrin and Phthalocyanine ChemistryRadical Photochemical Reactions