A single-step procedure for the preparation of palladium nanoparticles and a phosphine-functionalized support as catalyst for Suzuki cross-coupling reactions
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
We here report the preparation of supported palladium nanoparticles (NPs) stabilized by pendant phosphine groups by reacting a palladium complex containing the ligand 2-(diphenylphosphino)benzaldehyde with an amino-functionalized silica surface The Pd nanocatalyst is active for Suzuki cross-coupling reaction avoiding any addition of other sources of phosphine ligands The Pd intermediates and Pd NPs were characterized by solid-state nuclear magnetic resonance and transmission electron microscopy techniques The synthetic method was also applied to prepare magnetically recoverable Pd NPs leading to a catalyst that could be reused for up to 10 recycles In summary we gathered the advantages of heterogeneous catalysis magnetic separation and enhanced catalytic activity of palladium promoted by phosphine ligands to synthesize a new catalyst for Suzuki cross-coupling reactions The Pd NP catalyst prepared on the phosphine-functionalized support was more active and selective than a similar Pd NP catalyst prepared on an amino-functionalized support (C) 2010 Elsevier Inc All rights reserved FAPESP Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CAPES Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CNPq Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPq/INCT-Catalise Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CAPES-COFECUB[695/10] Comité Français d´Evaluation de la Coopération Universitaire avec le Brésil (COFECUB) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) PICS France Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) PICS-CNPq Brazil France[490678/2008-4] |
Identificador |
JOURNAL OF CATALYSIS, v.276, n.2, p.382-389, 2010 0021-9517 http://producao.usp.br/handle/BDPI/29177 10.1016/j.jcat.2010.09.028 |
Idioma(s) |
eng |
Publicador |
ACADEMIC PRESS INC ELSEVIER SCIENCE |
Relação |
Journal of Catalysis |
Direitos |
restrictedAccess Copyright ACADEMIC PRESS INC ELSEVIER SCIENCE |
Palavras-Chave | #Palladium #Iminophosphine #Suzuki reaction #Nanoparticle #Magnetic separation #IMINOPHOSPHINE-PALLADIUM(0) COMPLEXES #RECYCLABLE CATALYSTS #LIGAND #DYNAMICS #HECK #NMR #MONOLAYERS #CORE #SIZE #Chemistry, Physical #Engineering, Chemical |
Tipo |
article original article publishedVersion |