Surface catalysed Suzuki-Miyaura cross-coupling by Pd nanoparticles: an operando XAS study
| Autor: | Karen Wilson, Adam F. Lee, Peter J. Ellis, Ian J. S. Fairlamb |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Models Molecular X-ray absorption spectroscopy Base (chemistry) Chemistry Surface Properties Inorganic chemistry Molecular Conformation Nanoparticle Metal Nanoparticles Anisoles Silicon Dioxide Boronic Acids Catalysis Inorganic Chemistry Coupling (electronics) chemistry.chemical_compound Kinetics X-Ray Absorption Spectroscopy Catalytic cycle X-Ray Diffraction Homogeneous Pd nanoparticles Phenylboronic acid Palladium |
| Zdroj: | Dalton transactions (Cambridge, England : 2003). 39(43) |
| ISSN: | 1477-9234 |
| Popis: | Size-controlled, catalytically active PVP-stabilised Pd nanoparticles have been studied by operando liquid phase XAS during the Suzuki cross-coupling of iodonanisole and phenylboronic acid in MeOH–toluene using KOMe base. XAS reveals nanoparticles are stable to metal leaching throughout the reaction, with surface density Pd defect sites directly implicated in the catalytic cycle. The efficacy of popular selective chemical and structural poisons for distinguishing heterogeneous and homogeneous contributions in Pd catalysed cross-couplings is also explored. |
| Databáze: | OpenAIRE |
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