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Surface catalysed Suzuki-Miyaura cross-coupling by Pd nanoparticles: an operando XAS study.

Dalton transactions (Cambridge, England : 2003) (2010-10-05)
Adam F Lee, Peter J Ellis, Ian J S Fairlamb, Karen Wilson
ABSTRACT

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.

MATERIALS
Product Number
Brand
Product Description

Supelco
Anisole, analytical standard
Sigma-Aldrich
Anisole, anhydrous, 99.7%
Sigma-Aldrich
Anisole, ≥99%, FCC, FG
Sigma-Aldrich
Anisole, ReagentPlus®, 99%
Supelco
Anisole, Pharmaceutical Secondary Standard; Certified Reference Material