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Université de Neuchâtel

Metallic Ruthenium nanoparticles intercalated in hectorite for highly selective catalytic hydrogenations

Sun, Bing ; Süss-Fink, Georg (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The design of nanocomposites consisting of functional metals and proper matrices is a very active field of research for the development of recyclable catalysts. Highly active metallic nanoparticles must be stabilized by a suitable support in order to prevent aggregation to bulk metal. Hectorite, a representative smectite clay featured by its unique swelling properties and flexible intercalation...

Université de Neuchâtel

Synthesis and Anticancer Activity of Long-Chain Isonicotinic Ester Ligand-Containing Arene Ruthenium Complexes and Nanoparticles

Süss-Fink, Georg ; Khan, Farooq-Ahmad ; Juillerat-Jeanneret, Lucienne ; Dyson, Paul J. ; Renfrew, Anna K.

In: Journal of Cluster Science, 2010, vol. 21, no. 3, p. 313-324

Arene ruthenium complexes containing long-chain N-ligands L1 = NC5H4–4-COO–C6H4–4-O–(CH2)9–CH3 or L2 = NC5H4–4-COO–(CH2)10–O–C6H4–4-COO–C6H4–4-C6H4–4-CN...

Université de Neuchâtel

Highly selective C = C bond hydrogenation in α,β-unsaturated ketones catalyzed by hectorite-supported ruthenium nanoparticles

Khan, Farooq-Ahmad ; Vallat, Armelle ; Süss-Fink, Georg

In: Journal of Molecular Catalysis A: Chemical, 2010, vol. 355, p. 168–173

Metallic ruthenium nanoparticles intercalated in hectorite (particle size ∼7 nm) were found to catalyze the specific hydrogenation (conversion 100%, selectivity > 99.9%) of the carbon–carbon double bond in α,β-unsaturated ketones such as 3-buten-2-one, 3-penten-2-one, 4-methyl-3-penten-2-one. The catalytic turnovers range from 765 to 91,800, the reaction conditions being very mild...

Université de Neuchâtel

Highly selective low-temperature hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol catalysed by hectorite-supported ruthenium nanoparticles

Khan, Farooq-Ahmad ; Vallat, Armelle ; Süss-Fink, Georg

In: Catalysis Communications, 2011, vol. 12, no. 15, p. 1428–1431

Metallic ruthenium nanoparticles intercalated in hectorite (particle size ~ 4 nm) were found to catalyse the hydrogenation of furfuryl acohol to give tetrahydrofurfuryl alcohol in methanolic solution under mild conditions. The best results were obtained at 40 °C under a hydrogen pressure of 20 bar (conversion 100%, selectivity > 99%). After a total turnover number of 1423, the hectorite...

Université de Neuchâtel

Metallic ruthenium nanoparticles derived from arene ruthenium complexes : synthesis, characterization and applications

Khan, Farooq-Ahmad ; Süss-Fink, Georg (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012 ; 2247.

The present work deals with the preparation of ruthenium nanoparticles using an organometallic approach. In the first part, the synthesis of ruthenium nanoparticles stabilized by mesogenic isonicotinic ester ligands is presented. We have been interested in the use of long-chain isonicotinic esters as lipohilic components in order to increase the anticancer activity of arene ruthenium...

Université de Neuchâtel

Shape- and Size-Selective Preparation of Hectorite-Supported Ruthenium Nanoparticles for the Catalytic Hydrogenation of Benzene

Süss-Fink, Georg ; Khan, Farooq-Ahmad ; Boudon, Julien ; Spassov, Vladislav

In: Journal of Cluster Science, 2009, vol. 20, no. 2, p. 341-353

The cationic organometallic aqua complexes formed by hydrolysis of [(C6H6)2RuCl2]2 in water, mainly [(C6H6)Ru(H2O)3]2+, intercalate into white sodium hectorite, replacing the sodium cations between the anionic silicate layers. The yellow hectorite thus obtained reacts in water with...

Université de Neuchâtel

Ruthenium Nanoparticles Intercalated in Hectorite: A Reusable Hydrogenation Catalyst for Benzene and Toluene

Süss-Fink, Georg ; Mollwitz, Birgit ; Therrien, Bruno ; Dadras, Massoud ; Laurenczy, Gabor ; Meister, Annette ; Meister, Götz

In: Journal of Cluster Science, 2007, vol. 18, no. 1, p. 87-95

The cationic organometallic aqua complexes formed by hydrolysis of [(C6H6)RuCl2]2 in water, mainly [(C6H6)Ru(H2O)3]2+, intercalate into sodium hectorite by ion exchange, replacing the sodium cations between the anionic silicate layers. The yellow hectorite thus obtained reacts in ethanol with...