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

Dendrimer-based gold nanoparticles : syntheses, characterization and organization

Boudon, Julien ; Bürgi, Thomas (Dir.) ; Deschenaux, Robert (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2117.

Since the incorporation of gold nanoparticles (AuNPs) in the Lycurgus cup in the 4th century AD allowing a dichroism in reflected and transmitted light, headways paved the path for the synthesis of AuNPs. The optical (surface plasmon resonance) and other properties become size-dependant for small AuNPs (quantum size effect) and can be modulated by controlled synthesis conditions. It is this size...

Université de Neuchâtel

Liquid-Crystalline Thiol- and Disulfide-Based Dendrimers for the Functionalization of Gold Nanoparticles

Frein, Stéphane ; Boudon, Julien ; Vonlanthen, Mireille ; Scharf, Toral ; Barberá, Joaquín ; Süss-Fink, Georg ; Bürgi, Thomas ; Deschenaux, Robert

In: Helvetica Chimica Acta, 2008, vol. 91, no. 12, p. 2321-2337

Liquid-crystalline dendrons carrying either a thiol or disulfide function which display nematic, smectic A, columnar, or chiral nematic phases have been synthesized. Their mesomorphic properties are in agreement with the nature of the mesogenic units and structure of the dendrons. The first-generation poly(aryl ester) dendron containing two cyanobiphenyl mesogenic units was used to functionalize...