Room-temperature catalytic hydrogenation of aromatic hydrocarbons using rhodium complex [(1,5-COD)RhH]4 [COD = 1,5-cyclooctadiene] as a catalyst precursor

Duan, Zhibang; Hampden‐Smith, Mark J.; Sylwester, Alan P.

doi:10.1021/cm00024a008

Cited by 37 publications

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“…The main advantage of our system is a very high activity, when compared to monomolecular rhodium complexes [7][8][9][10]. The application of biphasic conditions enables easy separation of the organic products from the catalyst.…”

Section: Discussionmentioning

confidence: 99%

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Rh(0) Nanoparticles: Synthesis, Structure and Catalytic Application in Suzuki–Miyaura Reaction and Hydrogenation of Benzene

Gniewek

Trzeciak

2013

Top Catal

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Rhodium colloids have been prepared by chemical reduction of an aqueous solution of rhodium trichloride with different aliphatic alcohols (from methanol to pentanol) in the presence of polyvinylpyrrolidone (PVP) as the stabilizing agent. The obtained Rh(0) nanoparticles have been characterized structurally by means of X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. Catalytic activity of the synthesized Rh/PVP colloids has been evidenced in the Suzuki-Miyaura coupling reaction of phenylboronic acid with bromobenzaldehyde. The choice of the reducing agent and reduction conditions enabled to obtain Rh(0) colloids showing various mean nanoparticle diameters (ranging from 3.8 to 6.0 nm) and different nanoparticle morphologies. These two factors play the decisive role from point of view of catalytic activity of the presented systems. The most active Rh/PVP catalyst, prepared using ethanol as the reducing agent, have also been applied in hydrogenation of benzene to cyclohexane, showing very high activity in this process.

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Section: Discussionmentioning

confidence: 99%

“…Nevertheless, it exhibits remarkable and often unique catalytic properties in comparison with other noble metals, most particularly in hydrogenation reaction [7][8][9][10][11]. Rhodium in form of nanoparticles, situated at the border between homogeneous and heterogeneous catalysis, is even more versatile [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Rh(0) Nanoparticles: Synthesis, Structure and Catalytic Application in Suzuki–Miyaura Reaction and Hydrogenation of Benzene

Gniewek

Trzeciak

2013

Top Catal

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“…These nanoparticles showed catalytic properties in the hydrogenation of aromatic hydrocarbons such as benzene or toluene [39] . Similarly, Finke and S ü ss -Fink have proved that the true catalyst allowing benzene hydrogenation is a nanoheterogeneous Ru(0) n catalyst in the system using the supramolecular triruthenium cluster cation [Ru 3 ( µ 2 -H) 3 ( η 6 -C 6 H 6 )( η 6 -C 6 Me 6 ) 2 ( µ 3 -O)] + as starting species.…”

Section: Ligand -Stabilized Rh and Ru Nanoparticlesmentioning

confidence: 99%

Rhodium and Ruthenium Nanoparticles in Catalysis

Roucoux¹,

Nowicki²,

Philippot³

2007

Nanoparticles and Catalysis

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IntroductionThe last decade has evidenced an ever -increasing interest in the nanometric size chemical species area. More particularly, a great number of studies have been based on the synthesis and applications of noble transition metal colloids [1,2] . The development of soluble metal nanoparticles and colloids as highly active nanocatalysts has been the focus of considerable effort and several research groups have contributed signifi cantly to this central fi eld of nanosciences and nanotechnology [3 -5] . Due to their particular matter state, between homogeneous and heterogeneous, these frontier species are sometimes called " semi -heterogeneous " or " nanoheterogeneous " catalysts. From now on, soluble noble metal nanoparticles are considered as an unavoidable family of catalysts under mild conditions [6 -10] .Contrary to classical heterogeneous catalysts, metal nanocatalysts -generally defi ned as particles between 1 and 10 nm in size -can be obtained by the bottomup approach in two strategic ways according to the nature of the precursor, namely metal salts and organometallic compounds. Moreover, noble metal nanoparticles can be synthesized by a variety of methods according to the " organic " or " aqueous " nature of the media and the type of stabilizers used. The choice of the reaction parameters can provide some degree of control of particle size and particle composition, which is important for high activity and selectivity in catalytic applications. Finally, this fi eld has also allowed, from recent kinetic and mechanistic studies, noble transition metal colloids to be registered as effective catalysts.Over the past decade, nanoparticles, sometimes also called giant clusters, nanoclusters or colloids have been investigated as nanocatalysts in various catalytic applications such as hydrogenation, C − C coupling and other original reactions. This chapter reviews the recent progress in catalysis with ruthenium and rhodium nanoparticles as soluble nanocatalysts in various liquid media, organized according to the catalytic reaction type. 349Nanoparticles and Catalysis. Edited by Didier Astruc

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“…Aromatic hydrocarbon solutions of this complex are unstable when exposed to dihydrogen, allowing the formation of 2 nm size, crystalline but agglomerated Rh nanoparticles that show catalytic properties in arene hydrogenation [58].…”

Section: Stabilization By the Reaction Mediummentioning

confidence: 99%

Organometallic Nanoparticles of Metals or Metal Oxides

Chaudret

Philippot

2007

Oil & Gas Science and Technology - Rev. IFP

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*Dedicated to Yves Chauvin for his exceptional and exemplary contribution to organometallic chemistry and catalysis Ce manuscrit est dédié à Yves Chauvin pour sa contribution exceptionnelle et exemplaire à la chimie organométallique et à la catalyse Résumé -Revue sur la synthèse de nanoparticules de métaux et d'oxydes métalliques -Nous présentons dans cet article une revue sur la synthèse de nanoparticules de métaux et d'oxydes métalliques utilisant une approche organométallique et plus précisément des complexes de ligands hydrocarbures comme précurseurs. L'avantage principal de cette approche réside dans la décomposition facile de ces précurseurs qui peut être effectuée dans des conditions douces et qui ne génère aucun polluant potentiel des nanoparticules. Ceci permet le contrôle de la taille, de la forme et de l'état de surface des nanoparticules formées. Les résultats sont présentés par métaux et par mode de stabilisation (polymères, ligands, liquides ioniques). Nous présentons également quelques résultats concernant l'utilisation de cette approche pour la préparation de matériaux hybrides contenant des nanoparticules incluses dans des matrices minérales (membranes d'alumine, silice mésoporeuse). Enfin nous décrivons également une extension de cette approche pour la synthèse directe de nanoparticules en lit fluidisé. Abstract -Organometallic Nanoparticles of Metals or Metal Oxides

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Room-temperature catalytic hydrogenation of aromatic hydrocarbons using rhodium complex [(1,5-COD)RhH]4 [COD = 1,5-cyclooctadiene] as a catalyst precursor

Cited by 37 publications

References 0 publications

Rh(0) Nanoparticles: Synthesis, Structure and Catalytic Application in Suzuki–Miyaura Reaction and Hydrogenation of Benzene

Rh(0) Nanoparticles: Synthesis, Structure and Catalytic Application in Suzuki–Miyaura Reaction and Hydrogenation of Benzene

Rhodium and Ruthenium Nanoparticles in Catalysis

Organometallic Nanoparticles of Metals or Metal Oxides

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