Angewandte Chemie International Edition · 2000 · 135 citations · 0 references
Natural SciencesChemistryMaterials ScienceCatalysisInorganic ChemistryReaction EngineeringCatalyst DeactivationCatalytic MaterialsCatalytic MechanismsRedox CatalysisRedox ChemistrySupported CatalystsActive Site ProximityAtom Transfer CatalysisCatalyst Structure - Activity RelationshipsCatalytic ActivityDendritic ArchitectureMetal-based CatalysisNickel CatalysisNickel Catalysts
Advantages of homo- and heterogeneous catalysts are united in metallodendritic molecules where nickel-based catalysts are bound to carbosilane dendrimers. The first direct indication of a "dendritic effect" in the redox catalysis behavior is described: variation of the dendrimer support controls the proximity of the Ni(II) centers, which in turn controls catalytic activity. Catalyst deactivation, by means of Ni(III) formation, can be avoided by a larger separation of the Ni(II) centers (see picture).