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May 07, 2015
Dans un système hôte-invité, un petit ensemble ‑ l'invité ‑ interagit avec un grand ensemble ‑ l'hôte ‑ qui joue souvent un rôle de thermostat.
Jul 02, 2014
Elementary chemical acts are often associated with the crossing of a saddle point: 2 colliding reagents are climbing up a valley of the ground state potential energy surface which describes their interaction; they reach a saddle point and run downhill a valley toward the reaction products. The landscape is more complicated when electronic excitation is present since several potential surfaces are coupled, often via conical intersections (see Fig.1).
May 16, 2014
One of the goals in physical chemistry is to follow reaction paths in details. Many techniques have been developed with studies conducted in cells, effusive or supersonic beams, using laser spectroscopy, mass spectrometry etc. as investigation tools.
Dec 12, 2012
Ionized molecules are involved in many chemical reactions, and participate for an important part in the chemistry of the upper atmosphere and interstellar clouds. Data on the vibrational spectroscopy of these ions are thus needed to better understand the dynamics and energetics of so diluted matter.
Jul 13, 2012
The stability and conformational dynamics of biomolecules are strongly influenced by the dynamics of hydrogen bonds and by hydrogen transfer processes which occur through these bonds. Not surprisingly, a large activity develops since many years to understand which molecular deformations play a role when a hydrogen atom is transferred through a hydrogen bond. The acetylacetone molecule (noted AcAc in the figure) is often used to approach this question from a fundamental point of view.
Nov 13, 2007
Clusters consists in a set of several up to million atoms in condensed phase with nanometric finite size. The investigation of their properties as the function of their increasing size is sometimes presented as one way to build a macroscopic condensed world from a gas.
Mar 16, 2007
J.M. Mestdagh, L. Poisson, I. Fischer, P. D’Oliveira
Service des Photons, Atomes et Molécules DRECAM/SPAM
The very new laser of the "Plateforme Laser Femtoseconde Accordable, PLFA" began to be installed last year within the Service of Photons Atoms and Molecules (SPAM). It belongs to the infrastructure SLIC, member of the European network LASERLAB-EUROPE and is thus accessible to European scientists.
Oct 12, 2004
E. Gloaguen1, J.-M. Mestdagh1, L. Poisson1, J.-P. Visticot1 ,B. Soep1,M. Coroiu2, A. Eppink2 et D.H. Parker2
1Laboratoire Francis Perrin (CNRS-URA-2453), DSM/DRECAM/ Service des Photons, Atomes et Molécules, C.E.A. Saclay, F-91191 Gif-sur-Yvette Cedex, France 2 Department of Molecular and Laser Physics, University of Nijmegen Toernooiveld 1, 6525ED Nijmegen, Pays-bas


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