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Christian GEORGE

Contact Information

Christian GEORGE

Laboratoire d'Application de la Chimie à l'Environnement (LACE)
Domaine Scientifique de la Doua - Bâtiment J. Raulin
43 Boulevard du 11 Novembre 1918
F-69622 Villeurbanne Cedex, France
Tel: (33) 04 72 43 14 89
Fax: (33) 04 72 44 81 14
Christian.George@univ-lyon1.fr

Biography

Born in Basel, Switzerland, 1968
Married Catherine ROUF, 1994
Two sons: Romain (born 1997) and Thomas (born 2001)

"Licence and Maîtrise" in Physical Chemistry, University Louis Pasteur - Strasbourg - France, 1990
Ph.D., Physical Chemistry, University Louis Pasteur - Strasbourg - France, 1993
Postdoc, Fraunhofer Institure for Aerosol and Toxicology, Hannover - Germany, 1994-1995

Research Scientist, Centre de Géochimie de la Surface (CGS) - Strasbourg, 1995-1999
Research Scientist, Laboratoire d'Application de la Chimie à l'Environnement (LACE) - Villeurbanne, 1999-present

Editor, Atmospheric Chemistry and Physics - An Interactive Scientific Journal, , 1994-present

European Geophysical Society Session Convener, 1998 - present

Research Interest

Chemical transformation in the atmosphere are influenced by the presence of condensed matter (such as aerosols, hydrometeors,...) which is ubiquitous and introduces a substrate on which many chemical reactions may occur which would not occur in a purely homogeneous gas phase. The field of atmospheric multiphase chemistry is consequently becoming an important topic due to the potential impacts of these reactions.

Understanding chemical transformations on liquid droplets requires different kind of knowledge. The first deals with the entry of the gas into a liquid or in other words, the uptake kinetics. I studied such processes using techniques such as the droplet train or the wetted-wall flowtube. This lead to data on mass accommodation and uptake coefficients for various compounds of atmospheric relevance.

Once in the liquid, thoses gases may react with a full set of radicals or radicals anions. My current research interest delas with the kinetics of these reactions in bilk water but also at the air/water interface using standard laser flash photolysis setups or diffused reflectance at the droplet surface.

The outcome of such laboratory investigations may results in a better understanding of atmospheric multiphase chemistry.

Recent Publications

J.L. Ponche, Ch. George, Ph. Mirabel
Mass transfer at the air/water interface: mass accommodation coefficients for SO₂, HNO₃, NO₂ and NH₃.
J. Atmos. Chem., 16, 1, 1993.

A. Bongartz, Ch. George, J. Kames, Ph. Mirabel, J.L. Ponche, U. Schurath
Experimental determination of HONO mass accommodation coefficients using two different techniques
J. Atmos. Chem, 18, 149, 1994

Ch. George, J. Lagrange, Ph. Lagrange, Ph. Mirabel, C. Pallares, J.L. Ponche
Heterogeneous chemistry of trichloroacetyl chloride in the atmosphere
J. Geophys. Res., 99, 1255, 1994.

Ch. George, J.Y. Saison, J.L. Ponche, Ph. Mirabel
Kinetics of mass transfer of carbonyl fluoride, trifluoroacetyl fluoride and trifluoroacetyl chloride at the air/water interface
J. Phys. Chem., 98, 10857, 1994.

Ch. George, J.L. Ponche, Ph. Mirabel, W. Behnke, V. Scheer , C. Zetzsch
Study of the uptake of N₂O₅ by water and NaCl solutions
J. Phys. Chem, 98, 8780, 1994.

Ch. George, W. Behnke, V. Scheer and C. Zetzsch, L. Magi, J.L. Ponche, Ph. Mirabel
Heterogeneous reactions of ClNO₂ over aqueous solutions containing iodide
Geophys. Res. Lett., 22, 1505, 1995.

W. Behnke, A. Frenzel, Ch. George, V. Scheer, C. Zetzsch
Heterogeneous halogen activation: interconversion reactions for ClNO₂
J. Aerosol Sci., 26, S407, 1995.

W. Behnke, Ch. George, V. Scheer and C. Zetzsch
Production and decay of ClNO2 from the reaction of gaseous N₂O₅ with NaCl solution: bulk and aerosols experiments
J. Geophys. Res., 102, 3795-3804, 1997.

L. Magi, F. Schweitzer, C. Pallares, S. Cherif, Ph. Mirabel, Ch. George
Investigation of the Uptake Rate of Ozone and Methyl Hydroperoxide by Water Surfaces
J. Phys. Chem., 101, 4943-4949, 1997.

A. Frenzel, V. Scheer, W. Behnke, C. Zetzsch, L. Magi, Ch. George, Ph. Mirabel
Uptake of Nitrosyl Chloride (NOCl) by Aqueous Solutions
J. Phys. Chem. A, 101, 9359 -9366, 1997.

F. Schweitzer, L. Magi, Ph. Mirabel, Ch. George
Uptake Rate of Methanesulfonic Acid and Glyoxal by Aqueous Droplets
J. Phys. Chem. A, 102, 593 -600, 1998.

A. Frenzel, V. Scheer, R. Sikorsky, Ch. George, W. Behnke, C. Zetzsch
Heterogenous Interconversion Reactions of BrNO₂, ClNO₂, Br₂ and Cl₂
J. Phys. Chem. A, 102, 1329-1337, 1998.

F. Schweitzer, L. Magi, Ph. Mirabel, Ch. George
Multi-phase Chemistry of N₂O₅, ClNO₂ and BrNO₂
J. Phys. Chem. A, 102, 3942-3952, 1998.

F. Schweitzer, L. Magi, Ph. Mirabel, Ch. George
Heterogeneous Chemistry of Nitryl Halides in Relation to Tropospheric Halogen Activation
J. Atmos. Chem., 34, 101-117, 1999

E. Martin, Ch. George, Ph. Mirabel
Low Temperature Density and Surface Tension of H₂SO₄/HNO₃/H₂O ternary systems
Geophys. Res. Letter, 27, 197-200, 2000

F. Schweitzer, L. Magi, Ph. Mirabel, Ch. George
Uptake of Hydrogen Halides by Water Droplets
J. Phys. Chem. A, 104, 72-76, 2000

Y. Katrib, G. Deiber, F. Schweitzer, Ph. Mirabel, Ch. George
Bromine Chloride Chemical transformation at the Air/Water Interface
J. Aerosol Sci., 32, 893-911, 2001.

Ch. George, H. El Rassy and J.-M. Chovelon
Reactivity of Selected Volatile Organic Compounds (VOCs) Toward the Sulfate Radical (SO₄^-)
Int. J. Chem. Kinet., 33, 539-547, 2001.

Ch. George and J.-M. Chovelon
A Laser Flash Photolysis Study of the Decay of SO4- Radical Anions in Presence of Cl- Anions in Aqueous Solutions
Chemosphere, 47, 385-393, 2002.

Y. Katrib, G. Deiber, P. Mirabel, S. Le Calvé , C. George, A. Mellouki , G. Le Bras
Atmospheric loss processes of dimethyl and diethyl carbonate
J. Atmos. Chem., 43, 151-174, 2002.

B. Ervens, C. George, J. E. Williams, G. V. Buxton, G. A. Salmon, M. Bydder, F. Wilkinson, F. Dentener, P. Mirabel , R. Wolke and H. Herrmann
CAPRAM2.4 (MODAC mechanism): An extended and condensed tropospheric aqueous phase mechanism and its application
J. Geophys. Res., 108, No. D14, 4426, DOI 2002JD002202

L. Gutzwiller, Ch. George, E. Rössler and M. Ammann
Reaction Kinetics of NO₂ with Resorcinol and 2,7-Naphalenediol in the Aqueous Phase at Different pH
J. Phys. Chem. A, 106, 12045-12050, 2002.

R.S. Strekowski, R. Remorov and Ch. George
Direct Kinetic Study of the Reaction of Cl₂^- Radical Anions with Ethanol at the Air-Water Interface
J. Phys. Chem. A, 107(14), 2497-2504, 2003

Ch. George, D. Rousse, E. Perraudin and R. Strekowski
A new approach for studying aqueous phase OH kinetics: applications of Teflon waveguides
Phys. Chem. Chem. Phys., 5, 1562-1569, 2003

Davy Rousse and Christian George
A Novel Long Path Photolysis Cell – Application to the Reactivity of Selected Organic Compounds toward the Nitrate Radical (NO₃)
Phys. Chem. Chem. Phys., 6, 3408 – 3414, 2004

G. Deiber, Ch. George, S. Le Calvé, F. Schweitzer, Ph. Mirabel
Uptake study of ClONO₂ and BrONO₂ by water droplets
Atmos. Chem. Phys, 4, 1291-1299, 2004.

G. Aymoz, J.-L. Jaffrezo, V. Jacob, A. Colomb and Ch. George
Evolution of organic and inorganic components of aerosol during a Saharan dust episode observed in the French Alps

Atmos. Chem. Phys, 4, 3875-3909, 2004.