http://dspace-roma3.caspur.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. 2013-06-20T04:52:21Z http://hdl.handle.net/2307/274 <Title>Palladium nanoparticles supported on polyvinylpyridine: Catalyticactivity in Heck-type reactions and XPS structural studies</Title> <Authors>Evangelisti, Claudio; Panziera, Nicoletta; Pertici, Paolo; Vitulli, Giovanni; Salvadori, Piero; Battocchio, Chiara; Polzonetti, Giovanni</Authors> <Issue Date>2009-03</Issue Date> <Is part of>Journal of catalysis</Is part of> <Volume>262</Volume> <Pages>287-293</Pages> <Abstract>Palladium nanoparticles, obtained by metal vapour synthesis (MVS), weredeposited on cross-linked polyvinylpyridine. The Pd/PVPy system showedhigh catalytic activity in the Heck C-C coupling reaction of iodo- andbromo-arenes (iodobenzene, bromobenzene, p-nitrobromobenzene,p-bromoacetophenone, p-(methoxy)bromobenzene) with alkyl acrylates(methyl acrylate, n-butyl acrylate, ethylhexyltrans-3-(4-methoxyphenyl)acrylate) at 100 degrees C-175 degrees Cworking under nitrogen atmosphere as well as in air. The catalyst isstable and the leaching of metal in solution is very low. When reused,the recovered Pd/PVPy maintains the catalytic activity of the pristinematerial. XPS structural studies performed on the starting catalyst aswell as on the recovered one indicate the presence of a interactionbetween the basic nitrogen of the pyridine present in the polymer andthe metal. (C) 2009 Elsevier Inc. All rights reserved.</Abstract> 2009-02-28T23:00:00Z