Mesoporous Graphitic Carbon Nitride as a Heterogeneous Organic Photocatalyst in the Dual Catalytic Arylation of Alkyl Bis(catecholato)silicates
Tobias E. Schirmer, Mehdi Abdellaoui, Aleksandr Savateev, Cyril Ollivier, Markus Antonietti, Louis Fensterbank, Burkhard König
Abstract
Mesoporous graphitic carbon nitride (mpg-CN) is introduced as a heterogeneous photocatalyst to perform dual photoredox- and nickel-catalyzed cross-coupling reactions between alkyl bis(catecholato)silicates as radical precursors and aryl or alkenyl bromides. The synergy between this recyclable photocatalyst and the broadly applied homogeneous nickel complex [Ni(dtbbpy)Br2] gives access to C(sp2)–C(sp3) cross-coupling products in a sustainable fashion. The recycled mpg-CN photocatalyst was analyzed by time-resolved emission spectroscopy and EPR spectroscopy.
Topics & Concepts
PhotocatalysisAlkylCatalysisChemistryMesoporous materialGraphitic carbon nitrideCarbon nitrideNickelPhotochemistryArylElectron paramagnetic resonanceCarbon fibersSpectroscopyOrganic chemistryMaterials scienceQuantum mechanicsComposite numberPhysicsNuclear magnetic resonanceComposite materialRadical Photochemical ReactionsSulfur-Based Synthesis TechniquesCatalytic C–H Functionalization Methods