Concept

Chlorure d'aluminium

Publications associées (90)

Sub-ppm multi-gas photoacoustic sensor

A photoacoustic multi-gas sensor using tuneable laser diodes in the near-infrared region is reported. An optimized resonant configuration based on an acoustic longitudinal mode is described. Automatic tracking of the acoustic resonance frequency using a pi ...

Elsevier2006

Fluorinated β-Diketones for the Extraction of Lanthanide Ions: Photophysical Properties and Hydration Numbers of Their EuIII Complexes

Jean-Claude Bünzli, Anne-Sophie Chauvin, Frédéric Gumy

Tris(β-diketonato)europium(III) with a series of variably fluorinated ligands derived from 3,5-heptanedione were synthesised with the aim of determining their hydration state under extraction conditions. The number of coordinated water molecules was determ ...

2006

Switching the Mechanism of Catalyst Activation by Ionic Liquids

Paul Joseph Dyson, Corinne Daguenet

In ionic liqs. (ILs), the activation of a ruthenium(II) catalyst precursor occurs via an unexpected mechanism, which is different from the activation mechanism that takes place in water. The effectiveness of a biphasic catalytic hydrogenation reaction usin ...

2006

Ionic solid-state dimers and polymers derived from imidazolium dicarboxylic acids

Paul Joseph Dyson, Zhaofu Fei, Wee Han Ang

A series of imidazolium dicarboxylic acids have been prepd. from the reaction of the 1,3-bis(carboxymethyl)imidazolium zwitterion with the Bronsted acids HX (X = F, Br, Cl, ClO4). The structures of these acids have been established in the solid ...

2006

Rationalisation of solvent effects in the diels-alder reaction between cyclopentadiene and methyl acrylate in room temperature ionic liquids

Paul Joseph Dyson, Gabor Laurenczy, Ana Vidis

The Diels-Alder reaction between cyclopentadiene and methyl acrylate in ionic liquids has been studied in detail. The effect of contamination of the ionic liquids by common impurities, viz. sodium and chloride ions, and water, on the selectivity has been i ...

2005

Low-temperature thick-film dielectrics and resistors for metal substrates

Peter Ryser, Thomas Maeder, Caroline Jacq, Sonia Vionnet Menot

In this work, a set of low-temperature thick-film dielectrics consisting of two high-lead low-temperature glasses, stabilised by various amounts of alumina filler, is characterised on alumina and aluminium metal, as a function of firing temperature. Corres ...

2005

Synthesis of a silk-inspired peptide-oligothiophene conjugate

Harm-Anton Klok

The first example of an oligothiophene-peptide conjugate, which was obtained by solid-phase acylation of a resin-bound silk-inspired oligopeptide sequence with a carboxylic acid functionalized regioregular tetra(3- hexylthiophene) derivative, is reported. ...

2004

Fissuration à chaud: des alliages organiques aux superalliages

Michel Rappaz, Jean-Marie Drezet, Piero Daniele Grasso

L’apparition de fissures ou criques à chaud pendant la coulée des matériaux métalliques représente un défaut sérieux. L’EPF-Lausanne a développé un critère d’initiation de fissures qui est basé sur l’équation de conservation de la masse appliquée à la zone ...

Elsevier2004

Theoretical Analysis of the Smallest Carbon Cluster Containing a Planar Tetracoordinate Carbon

A series of mols., based on the smallest carbon cluster with one planar tetracoordinate carbon atom, C52-, are presented. To gain a better understanding about which electronic factors contribute to their stabilization, several global reactivity indexes, mo ...

2004

Inhibition of catalytic activity in ionic liquids: Implications for catalyst design and the effect of cosolvents

Paul Joseph Dyson, Corinne Daguenet

As a consequence of inherently weak interactions between the chloride anion and the 1-butyl-3-methylimidazolium cation (ca. 15 kJ/mol), chloride dissociation from a transition-metal complex can be thermodynamically disfavored in ionic liquids. Therefore, w ...

2004

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