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1130857 
Journal Article 
"Click" Polymer-Supported Palladium Nanoparticles as Highly Efficient Catalysts for Olefin Hydrogenation and Suzuki Coupling Reactions under Ambient Conditions 
Ornelas, C; Diallo, AK; Ruiz, J; Astruc, D 
2009 
1 
Advanced Synthesis & Catalysis
ISSN: 1615-4150
EISSN: 1615-4169 
351 
13 
2147-2154 
WOS:000270404700016 
Complexation of palladium(II) acetate [Pd(OAC)(2)] or dipotassium tetrachloropalladate [K2PdCl4] to "click" polymers functionalized with phenyl, ferrocenyl and sodium sulfonate groups gave polymeric palladium(II)-triazolyl complexes that were reduced to "click" polymer-stabilized palladium nanoparticles (PdNPs). Transmission electron microscopy (TEM) showed that reduction using sodium borohydride (NaBH,) produced PdNPs in the 1-3 run range of diameters depending on the nature of the functional group, whereas slow reduction using methanol yielded PdNPs in the 22-25 nm range. The most active of these PdNPs (0.01% mot Pd), stabilized by poly(ferrocenyltriazolylmethyl)styrene, catalyzed the hydrogenation of styrene at 25 degrees C and 1 atm hydrogen, with turnover numbers (TONs) of 200,000. When stabilized by the water-soluble poly(sodium sulfonate-triazolylmethyl)styrene, the PdNPs (0.01% mot Pd) catalyze the Suzuki-Miyaura coupling between iodobenzene (PhI) and phenylboronic acid [PhB(OH)(2)] in water/ethanol (H2O/EtOH) at 25 degrees C with TONs of 8,200. This high catalytic activity is comparable to that obtained with "click" dendrimer-stabilized PdNPs under ambient conditions. 
catalysis; "click" polymers; hydrogenation; palladium nanoparticles; Suzuki-Miyaura reaction; water-soluble catalyst 
IRIS
• Methanol (Non-Cancer)
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