Efficient Click-Polymer-Stabilized Palladium Nanoparticle Catalysts for Suzuki-Miyaura Reactions of Bromoarenes and Reduction of 4-Nitrophenol in Aqueous Solvents

摘要

Palladium nanoparticles (size = 1.6 ± 0.3 nm) stabilized by a polyethylene glycol containing triazolyl rings, synthesized by click reaction in water, are efficient catalysts for the Suzuki-Miyaura coupling of bromoarenes in aqueous ethanol and the borohydride reduction of 4-nitrophenol in water. Turnover numbers (TONs) reach 99,000 and turn- over frequencies (TOFs) are up to 198,000 h~(-1) for the C—C cross coupling reactions in water/ethanol.