Articles producció científica> Química Física i Inorgànica

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

  • Dades identificatives

    Identificador: PC:3117
    Autors:
    Blondeau, P.Martinez-Espinar, F.Nolis, P.Chaudret, B.Claver, C.Castillón, S.Godard, C.
    Resum:
    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.
  • Altres:

    Autor segons l'article: Blondeau, P.; Martinez-Espinar, F. ; Nolis, P. ; Chaudret, B. ; Claver, C. ; Castillón, S. ; Godard, C.
    Departament: Química Física i Inorgànica Química Analítica i Química Orgànica
    Autor/s 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
    Paraules clau: hydrogenation NHCs rhodium nanoparticles
    Resum: 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.
    Grup de recerca: Síntesis Orgànica Estereoselectiva Organometàl.lics i Catàlisi Homogènia Grup de Quimiometria, Qualimetria i Nanosensors
    Àrees temàtiques: Chemistry Química Química
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0021-9517
    Identificador de l'autor: 0000-0003-1331-5055; ; ; ; 0000-0002-2518-7401; 0000-0002-0690-7549; 0000-0001-5762-4904
    Data d'alta del registre: 2018-02-21
    Pàgina final: 127
    Volum de revista: 354
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0021951717302956
    Programa de finançament: altres; Grupos consolidados; 2014SGR670 plan; Retos; CTQ2016-75016-R, AEI/FEDER, UE altres; Grant Marti Franquès- URV ; 2013PMF-PIPF-90
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.1016/j.jcat.2017.08.010
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2017
    Pàgina inicial: 113
    Tipus de publicació: Article Artículo Article
  • Paraules clau:

    Hidrogenació
    Rodi
    hydrogenation
    NHCs
    rhodium nanoparticles
    Chemistry
    Química
    Química
    0021-9517
  • Documents:

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