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Gabor Laurenczy

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Publications associées (99)

Aqueous phase homogeneous formic acid disproportionation into methanol

Gabor Laurenczy, Katerina Stefania Sordakis

Herein we describe formic acid disproportionation into methanol with a homogeneous iridium catalyst. Methanol yields of up to 74% were obtained in D2O at 50 °C. Initial H2 pressures further enhanced methanol formation, resulting in a highly concentrated 9. ...

Royal Society of Chemistry2017

Versatile palladium-catalyzed double carbonylation of aryl bromides

Gabor Laurenczy, Paul Joseph Dyson, Cornel Fink, Xinbang Wu

A versatile palladium-catalyzed double carbonylation of aryl bromides has been developed. Using Pd(OAc)2/BuPAd2 as the catalyst system and DBU as the base, under relatively low CO pressure, various a-ketoamides were produced in good yields. In order to get ...

Royal Society of Chemistry2017

An efficient Pt nanoparticle–ionic liquid system for the hydrodeoxygenation of bio-derived phenols under mild conditions

Gabor Laurenczy, Paul Joseph Dyson, Zhaofu Fei, Cornel Fink, Lu Chen

Platinum nanoparticles (NPs) were synthesized in situ in the ionic liquid (IL) [Emim]NTf2 (1-ethyl-3- methylimidazolium bis(trifluoromethylsulfonyl)imide) as well as in mixtures of [Emim]NTf2 with a second IL, Lewis acid or Brønsted acid, but in the absenc ...

Royal Society of Chemistry2017

Carbon Dioxide to Methanol: The Aqueous Catalytic Way at Room Temperature

Gabor Laurenczy, Katerina Stefania Sordakis

Carbon dioxide may constitute a source of chemicals and fuels if efficient and renewable processes are developed that directly utilize it as feedstock. Two of its reduction products are formic acid and methanol, which have also been proposed as liquid orga ...

Wiley-Blackwell2016

Quantitative aqueous phase formic acid dehydrogenation using iron(II) based catalysts

Gabor Laurenczy, Mickael Montandon-Clerc, Andrew Francis Dalebrook

We present here the results of our investigation on aqueous phase formic acid (FA) dehydrogenation using non-noble metal based pre-catalysts. This required the synthesis of m-trisulfonated-tris[2-(diphe nylphosphino)ethyl]phosphine sodium salt (PP3TS) as a ...

Elsevier2016

Calorimetric and Spectroscopic Studies on the Solvation Energetics for H2 Storage in the CO2/HCOOH System

Gabor Laurenczy, Cornel Fink

Solvents play a crucial role in many chemical reactions and additives can be used to shift the reaction equilibrium. Herein we study the enthalpy of mixing for selected solvents (aqueous, organic) and basic additives (amines, aqueous KOH) when mixed with f ...

Royal Society of Chemistry2016

Direct carbon dioxide hydrogenation to formic acid in acidic media

Gabor Laurenczy, Séverine Joëlle Moret, Paul Joseph Dyson

The present invention relates to a method of producing formic acid in a catalysed chemical reaction from hydrogen gas and carbon dioxide gas, said reaction being conducted in an acidic medium comprising a polar solvent over a wide range of temperatures at ...

2016

A simple catalyst for aqueous phase Suzuki reactions based on palladium nanoparticles immobilized on an ionic polymer

Gabor Laurenczy, Paul Joseph Dyson, Zhaofu Fei, Emilia Paunescu, Saeideh Ghazali Esfahani

Palladium nanoparticles immobilized on a cross-linked imidazolium-containing polymer were evaluated as a catalyst for Suzuki carbon-carbon cross-coupling reactions using water as the solvent. The nanocatalysts show good catalytic activities for aryl iodide ...

Science Press2016

Hydrogen Storage in the Carbon Dioxide - Formic Acid Cycle

Gabor Laurenczy, Mickael Montandon-Clerc, Cornel Fink

This year Mankind will release about 39 Gt carbon dioxide into the earth's atmosphere, where it acts as a greenhouse gas. The chemical transformation of carbon dioxide into useful products becomes increasingly important, as the CO2 concentration in the atm ...

Swiss Chemical Soc2015

Homogenous catalytic hydrogenation of bicarbonate with water soluble aryl phosphine ligands

Gabor Laurenczy, Paul Joseph Dyson, Katerina Stefania Sordakis

The chemical transformation of CO2 and bicarbonates into useful products becomes increasingly impor- tant as the atmospheric CO2 level has reached 400 ppm. Here a small library of sulfonated aryl mono- phosphines and aryl diphosphines was tested as stabili ...

Elsevier2015

Editorial

Gabor Laurenczy, Matthias Beller

Swiss Chemical Soc2015

A Viable Hydrogen Storage and Release System Based on Cesium Formate and Bicarbonate Salts: Mechanistic Insights into the Hydrogen Release Step

Gabor Laurenczy, Katerina Stefania Sordakis, Andrew Francis Dalebrook

Aqueous solutions of cesium formate and bicarbonate repre- sent an effective hydrogen storage–delivery couple that under- goes either release or take up of hydrogen in the presence of {RuCl2(mTPPTS)2}2 (TPPTS = triphenylphosphine trisulfonate) and excess m ...

Wiley-VCH Verlag2015

A novel platinum nanocatalyst for the oxidation of 5-Hydroxymethylfurfural into 2,5-Furandicarboxylic acid under mild conditions

Gabor Laurenczy, Paul Joseph Dyson, Zhaofu Fei, Duncan Thomas Lindsay Alexander, Ning Yan, Georgios Savoglidis, Sviatlana Siankevich

5-Hydroxymethylfurfural (HMF) is a key intermediate obtainable from various cellulosic (biomass) derivatives, but it must be converted to other chemicals such as 2,5-Furandicarboxylic acid (FDCA) for direct use. FDCA is an important derivative of HMF as it ...

Academic Press Inc Elsevier Science2014

Homogeneous Catalytic Dehydrogenation of Formic Acid: Progress Towards a Hydrogen-Based Economy

Gabor Laurenczy, Paul Joseph Dyson

One of the limiting factors to a hydrogen-based economy is associated with the problems storing hydrogen. Many different approaches are under evaluation and the optimum approach will not be the same for all applications, i.e., static, mobile, small and lar ...

2014

Enhanced Conversion of Carbohydrates to the Platform Chemical 5-Hydroxymethylfurfural Using Designer Ionic Liquids

Gabor Laurenczy, Rosario Scopelliti, Paul Joseph Dyson, Zhaofu Fei, Ning Yan, Sviatlana Siankevich

5-Hydroxymethylfurfural (HMF) is a key platform chemical that may be obtained from various cellulosic (biomass) derivatives. Previously, it has been shown that ionic liquids (ILs) facilitate the catalytic conversion of glucose into HMF. Herein, we demonstr ...

Wiley-V C H Verlag Gmbh2014

Amide bond formation via C(sp(3))-H bond functionalization and CO insertion

Gabor Laurenczy, Paul Joseph Dyson, Ning Yan, Huizhen Liu

An efficient method for the synthesis of amides via Pd-catalyzed oxidative carbonylation of C(sp(3))-H bonds with CO and amines is described. The route efficiently provides substituted phenyl amides from alkanes. ...

Royal Society of Chemistry2014

Electrostatic and Non-covalent Interactions in Dicationic Imidazolium-Sulfonium Salts with Mixed Anions

Gabor Laurenczy, Rosario Scopelliti, Paul Joseph Dyson, Zhaofu Fei, Ning Yan

A series of thioether-functionalised imidazolium salts have been prepared and characterized. Subsequent reaction of the thioether-functionalised imidazolium salts with iodomethane affords imidazolium-sulfonium salts composed of doubly charged cations and t ...

Wiley-V C H Verlag Gmbh2014

Chemical Equilibria in Formic Acid/Amine-CO2 Cycles under Isochoric Conditions using a Ruthenium(II) 1,2-Bis(diphenylphosphino)ethane Catalyst

Gabor Laurenczy, Matthias Beller, Katerina Stefania Sordakis

The equilibrium position in formic acid/amine–CO2 systems has been examined as a function of pressure and tem- perature under isochoric conditions. The homogeneous ruthe- nium(II)-1,2-bis(diphenylphosphino)ethane catalyst was active in both reactions, that ...

Wiley-VCH Verlag2014

Formic Acid Dehydrogenation Catalysed by Tris(TPPTS) Ruthenium Species: Mechanism of the Initial "Fast" Cycle

Gabor Laurenczy, Arnaud Thevenon, Ewan Patrick Frost-Pennington, Andrew Francis Dalebrook

Water-soluble ruthenium m-triphenylphosphinetrisulfonate (TPPTS) complexes are excellent catalysts for formic acid dehydrogenation. Interestingly, the choice of metal catalyst precursor has a direct influence on initial activities. The reaction with hexaaq ...

Wiley-VCH Verlag2014

Metal-Free Catalyst for the Chemoselective Methylation of Amines Using Carbon Dioxide as a Carbon Source

Gabor Laurenczy, Paul Joseph Dyson, Felix Daniel Bobbink, Shoubhik Das

N-methylation of amines is an important step in the synthesis of many pharmaceuticals and has been widely applied in the preparation of other key intermediates and chemicals. Therefore, the development of efficient methylation methods has attracted conside ...

Wiley-VCH Verlag GmbH2014

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