Articles producció científica> Química Física i Inorgànica

NHC-stabilised Rh nanoparticles: Surface study and application in the catalytic hydrogenation of aromatic substrates 

  • Datos identificativos

    Identificador: PC:3117
    Autores:
    Blondeau, P.Martinez-Espinar, F.Nolis, P.Chaudret, B.Claver, C.Castillón, S.Godard, C.
    Resumen:
    New Rh-NPs stabilised by N-Heterocyclic Carbenes (NHC) were synthesized by decomposition of [Rh(g3-C3H5)3] under H2 atmosphere and fully characterized. Surface studies by FT-IR and NMR spectroscopy employing isotopically labelled ligands were also performed. The Rh0.2 NPs are active catalysts in the reduction of various aromatic substrates. In the reduction of phenol, high selectivities to cyclohexanone or cyclohexanol were obtained depending on the reaction conditions. However, this catalytic system exhibited much lower activity in the hydrogenation of substituted phenols. Pyridine was easily hydrogenated under mild conditions and interestingly, the hydrogenation of 4-methyl and 4- trifluoromethylpyridine resulted slower than that of 2-methylpyridine. The hydrogenation of 1- (pyridin-2-yl)propan-2-one provided the b-enaminone 13a in high yield as a consequence of the partial reduction of the pyridine ring followed by isomerization. Quinoline could be either partially hydrogenated to 1,2,3,4-tetrahydroquinoline or fully reduced to decahydroquinoline by adjusting the reaction conditions.
  • Otros:

    Autor según el artículo: Blondeau, P.; Martinez-Espinar, F. ; Nolis, P. ; Chaudret, B. ; Claver, C. ; Castillón, S. ; Godard, C.
    Departamento: Química Física i Inorgànica Química Analítica i Química Orgànica
    Autor/es de la URV: BLONDEAU , PASCAL JEAN CLAUDE LEON; Martinez-Espinar, F. ; Nolis, P. ; Chaudret, B. ; CLAVER CABRERO, MARIA DEL CARMEN OROSIA; CASTILLÓN MIRANDA, SERGIO; GODARD , CYRIL
    Palabras clave: hydrogenation NHCs rhodium nanoparticles
    Resumen: New Rh-NPs stabilised by N-Heterocyclic Carbenes (NHC) were synthesized by decomposition of [Rh(g3-C3H5)3] under H2 atmosphere and fully characterized. Surface studies by FT-IR and NMR spectroscopy employing isotopically labelled ligands were also performed. The Rh0.2 NPs are active catalysts in the reduction of various aromatic substrates. In the reduction of phenol, high selectivities to cyclohexanone or cyclohexanol were obtained depending on the reaction conditions. However, this catalytic system exhibited much lower activity in the hydrogenation of substituted phenols. Pyridine was easily hydrogenated under mild conditions and interestingly, the hydrogenation of 4-methyl and 4- trifluoromethylpyridine resulted slower than that of 2-methylpyridine. The hydrogenation of 1- (pyridin-2-yl)propan-2-one provided the b-enaminone 13a in high yield as a consequence of the partial reduction of the pyridine ring followed by isomerization. Quinoline could be either partially hydrogenated to 1,2,3,4-tetrahydroquinoline or fully reduced to decahydroquinoline by adjusting the reaction conditions.
    Grupo de investigación: Síntesis Orgànica Estereoselectiva Organometàl.lics i Catàlisi Homogènia Grup de Quimiometria, Qualimetria i Nanosensors
    Áreas temáticas: Chemistry Química Química
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0021-9517
    Identificador del autor: 0000-0003-1331-5055; ; ; ; 0000-0002-2518-7401; 0000-0002-0690-7549; 0000-0001-5762-4904
    Fecha de alta del registro: 2018-02-21
    Página final: 127
    Volumen de revista: 354
    Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S0021951717302956
    Programa de financiación: altres; Grupos consolidados; 2014SGR670 plan; Retos; CTQ2016-75016-R, AEI/FEDER, UE altres; Grant Marti Franquès- URV ; 2013PMF-PIPF-90
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.1016/j.jcat.2017.08.010
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2017
    Página inicial: 113
    Tipo de publicación: Article Artículo Article
  • Palabras clave:

    Hidrogenació
    Rodi
    hydrogenation
    NHCs
    rhodium nanoparticles
    Chemistry
    Química
    Química
    0021-9517
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