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Featured researches published by C. de Bellefon.


Archive | 2001

Application of a Micromixer for the High Troughput Screening of Fluid-Liquid Molecular Catalysis

C. de Bellefon; Sylvain Caravieilhes; Pierre Grenouillet

High throughput synthesis methodologies, such as combinatorial techniques, are now applied to the discovery of molecular catalysts.1 Libraries of ligands which can be turned into catalysts by complexation to transition metals, are accessible. The effectiveness of this approach has been demonstrated for restricted libraries of compounds and in the case of single liquid phase catalysis.[2] However, numerous reactions of interest such as olefin oligomerisation, hydrogenation, carbonylation, hydroformylation, etc. are operated in gas-liquid or liquid-liquid systems. Inadequate control of phase and catalyst presentation, resulting from non-optimised agitation, may effectively have dramatic consequences in the estimation of selectivity and reactivity. For example, enantio- and regioselective catalysed reactions susceptible to mass transport effects, are known. Thus, a major challenge is to develop special reactors for rapid catalyst screening that would ensure good mass and heat transport, in a small volume. Application of such apparatus for intrinsic kinetic determination would also be of high interest. In this paper, a new concept to achieve High Throughput Screening (HTS) of polyphasic fluid reactions is proposed. As test reactions, a gas-liquid asymmetric hydrogenation and a liquid-liquid isomerisation have been chosen to validate our approach of HTS experiments. A preliminary work with the liquid-liquid system has been published recently.2


Advanced Synthesis & Catalysis | 2003

High Throughput Kinetic Investigations of Asymmetric Hydrogenations with Microdevices

C. de Bellefon; Nathalie Pestre; T. Lamouille; Pierre Grenouillet; Volker Hessel


Catalysis Today | 2005

Asymmetric catalytic hydrogenations at micro-litre scale in a helicoidal single channel falling film micro-reactor

C. de Bellefon; T. Lamouille; Nathalie Pestre; Frédéric Bornette; Helmut Pennemann; F. Neumann; Volker Hessel


Inorganic Chemistry | 1988

Synthesis and reactivity of bis(diphenylphosphino)methane- (dppm-)stabilized palladium-cobalt and palladium-platinum-cobalt clusters. Effect of platinum versus palladium on the neighboring palladium center

Pierre Braunstein; C. de Bellefon; Michel Ries


Inorganic Chemistry | 1993

dppm-Assisted synthesis and reactivity of bimetallic M-molybdenum, M-tungsten, M-cobalt, and M-manganese (M = platinum, palladium) complexes. Crystal structure of [cyclic] [(.eta.2-dppm)Pt(.mu.-dppm)W(CO)2CpPt,W][PF6].cntdot.CH2Cl2 (dppm = bis(diphenylphosphino)methane)

Pierre Braunstein; C. de Bellefon; B. Oswald; Michel Ries; Maurizio Lanfranchi; Antonio Tiripicchio


Inorganic Chemistry | 1993

Carbonylmetalate-induced phosphorus migration and bis(diphenylphosphino)methane (dppm-) assisted synthesis of bimetallic complexes and clusters of palladium and platinum with molybdenum, tungsten, manganese and cobalt

Pierre Braunstein; C. de Bellefon; B. Oswald


Sensors and Actuators B-chemical | 2006

Deposition of Pt-Catalyst in a micro-channel of a Silicon reactor/ Application to gas micro-TAS working at high temperature

Marilyne Roumanie; Christophe Pijolat; Valérie Meille; C. de Bellefon; Patrick Pouteau; Cyril Delattre


Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles | 2010

Single Pellet String Reactor for Intensification of Catalyst Testing in Gas/Liquid/Solid Configuration

A.I. Hipolito; M. Rolland; C. Boyer; C. de Bellefon


Aiche Journal | 2004

Investigations on pulse broadening for catalyst screening in gas/liquid systems

Helmut Pennemann; Volker Hessel; H.-J. Kost; H. Löwe; C. de Bellefon


Inorganic Chemistry | 1990

Stepwise synthesis and reactivity of Ph2PCH2PPh2-stabilized mixed-metal clusters containing three of four different metals

Pierre Braunstein; C. de Bellefon; Michel Ries

Collaboration


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Pierre Braunstein

Centre national de la recherche scientifique

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Michel Ries

Centre national de la recherche scientifique

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Volker Hessel

Eindhoven University of Technology

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Nathalie Pestre

Centre national de la recherche scientifique

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Pierre Grenouillet

Centre national de la recherche scientifique

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T. Lamouille

Centre national de la recherche scientifique

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Frédéric Bornette

Centre national de la recherche scientifique

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Sylvain Caravieilhes

Centre national de la recherche scientifique

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Valérie Meille

Centre national de la recherche scientifique

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