Concept

Rayon ionique

Publications associées (100)

Ionic liquids based on imidazolium salts incorporating a nitrile functionality

Paul Joseph Dyson, Zhaofu Fei, Dongbin Zhao

Novel chemical compounds of the general formula KA, in which K is a 5- or 6- membered heterocyclic ring having 1-3 hetereo atoms, which can be independently N, S, or 0 with the proviso that at least one of the hetereo atoms must be a quaternized n ...

2005

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

Ruthenium-benzocrownether complexes: Synthesis, structures, catalysis and immobilisation in ionic liquids

Paul Joseph Dyson

A facile pathway to [RuCl2(η6-benzocrownether)]2 complexes is described and crystal structures of the complexes [RuCl2(η6-benzo-15-crown-5)]2 and [RuCl2(η6- ...

2005

Hydrogenation reactions in ionic liquids: Finding solutions for tomorrow's world

Paul Joseph Dyson, Dongbin Zhao

Ionic liquids are excellent solvents for conducting biphasic hydrogenation reactions offering many advantages over both related homogeneous processes and biphasic reactions in other alternative solvents. The relevant physicochemical properties of ionic liq ...

2005

Radial elasticity of multiwalled carbon nanotubes

Harald Brune, Stephan Fedrigo, Ismaël Palaci

We report an experimental and a theoretical study of the radial elasticity of multiwalled carbon nanotubes as a function of external radius. We use atomic force microscopy and apply small indentation amplitudes in order to stay in the linear elasticity reg ...

2005

Hydrogenation and hydroformylation in ionic liquids, water and biphasic systems

This work covers homogeneous and biphasic catalysis in ionic liquids and water. The work presented herein is divided into two major parts: catalytic hydrogenation and catalytic hydroformylation. The first part also serves as an introduction to catalysis in ...

EPFL2004

Synthesis and characterization of ionic liquids incorporating the nitrile functionality

Paul Joseph Dyson, Zhaofu Fei, Dongbin Zhao

A series of imidazolium salts with the nitrile functional group attached to the alkyl side chain, viz. [C(n)CNmim][X] (where C(n)CNmim is the 1-alkylnitrile-3-methylimidazolium cation and C-n = (CH2)(n), n = 1-4; X = Cl, PF6, and BF4) and [C(3)CNdmim][X] ( ...

2004

On the catalytic activity of cluster anions in styrene hydrogenation: considerable enhancements in ionic liquids compared to molecular solvents

Paul Joseph Dyson, Gabor Laurenczy, Dongbin Zhao

Many low oxidation state transition metal (carbonyl) clusters are salts and are highly soluble in ionic liquids. Since many are also effective catalysts/precatalysts for hydrogenation reactions, we have conducted a catalytic study of these compounds in ion ...

2004

Molecular structure, vibrational spectra, and hydrogen bonding of the ionic liquid 1-ethyl-3methyl-1H-imidazolium tetrafluoroborate

Paul Joseph Dyson, Ana Vidis

The IR and Raman spectra and conformations of the ionic liquid 1-ethyl-3-methyl-1H-imidazolium tetrafluoroborate, [EMIM][BF4] (6), were analyzed within the framework of scaled quantum mechanics (SQM). It was shown that SQM successfully reproduced the spect ...

2004

Catalysis by low oxidation state transition metal (carbonyl) clusters

Paul Joseph Dyson

This review seeks to evaluate the role of low oxidation state transition metal clusters (metal carbonyl clusters) in catalysis. The review commences with a discussion of the cluster surface analogy and then proceeds to discuss whether catalysis takes place ...

2004

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