Pd nanoparticles immobilized on graphene oxide/silica nanocomposite : efficient and recyclable catalysts for cross-coupling reactions
| Autor: | Oliveira, Rafael de Lima, 1984, Oliveira, Cristine Santos de, 1990, Landers, Richard, 1946, Correia, Carlos Roque Duarte, 1953 |
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| Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2018 |
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| Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP Repositório Institucional da Unicamp |
| Popis: | Agradecimentos: The authors would like to thank FAPESP for grants 2014/25770-6, and 2015/07773-0. We also thank to Multiuser Laboratory on Advanced Optical Spectroscopy- LMEO IQ-Unicamp, Laboratório de Peneiras Moleculares Micro e Meso Porosas, INCT/INOMAT- CNPQ/MCTI, Paulo Ernesto Marchezi (GO synthesis), Paola Corio (Raman spectroscopy), and LNNano for STEM-EDS analyses Abstract: Pd nanoparticles were synthesized on non-functionalized and functionalized graphene oxide with thiol and amine groups. The resulting materials were used as recyclable catalysts to study the influence of the functional groups and compare their activity and stability to non-functionalized graphene oxide and commercial catalysts in the Heck and Suzuki reactions. The catalyst based on non-functionalized GO and commercial catalysts lost their activity quickly because of particle growth (Oswald ripening). However, the presence of functional groups reduces significantly the metal particle growth producing more efficient catalysts for the Heck and the Suzuki reactions. Moreover, the synthesized catalysts were capable of catalyzing the Heck and Suzuki reactions using different substrates, achieving good activities and selectivities in all cases FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| Databáze: | OpenAIRE |
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