Electron transfer reactions between excited atoms and molecules

Electron tranfer reactions have been extensively studied for atoms in ground state colliding with molecules. On the contrary, few experiments have been perfomed for atoms excited above the first resonance states and it has been supposed by some authors that above a given degree of excitation, electron transfer becomes negligeable. By using a simple Landau-Zener model and a LCAO calculation of the coupling matrix element between ionic and covalent states for excited atoms and molecules with small electron affinities, we conclude that there is no limit to the electron transfer, in agreement with the experimental observation of ion pair formation for Rydberg atoms colliding with given molecules such as SF6

Multipole-bound anions of organic molecules

Multipole-bound anions are ions which possess weakly-bound excess electrons in diffuse orbitals. They can be either produced by electron attachment in the high-pressure region of supersonic expansions, leading to intense anion intensities allowing for photoelectron spectroscopy or by electron transfer from laser-excited atoms to cold molecular species. This review emphasizes applications of multipole-bound electron binding to the determination of structures and electron affinities of weakly-bound organic complexes. Studies involving charge-exchange between polar molecules and laser-excited surfaces, zwitterions and electron binding to molecules deposited on helium droplets are briefly considered

Cluster size effects upon anion solvation of N-heterocyclic molecules and nucleic acid bases

International audienc

Dipole-bound anion of 1,3-butanediol. Ab initio and Rydberg electron transfer spectroscopy study

International audienc

Neutral and negatively-charged formamide, N-methylformamide and dimethylformamide clusters

International audienc

Coupling infrared multiphoton dissociation spectroscopy, mass-spectrometry and ion mobility spectrometry for the determination of structures of angiotensin II cations

International audienc

Rydberg electron-transfer spectroscopy and ab initio studies of dimethylsulfoxide–water neutral and anion dimers

International audienc

Electron attachment to strongly polar clusters: formamide molecule and clusters.

Electron localization is studied in formamide cluster anions. The isolated formamide molecule has a large dipole moment and its clusters can give birth to multipole-bound anions as well as valence anions. The vertical electron affinity of tyhe isolated molecule is determined by means of Electron Transmission Spectroscopy. The anion formation process is studied as a function of cluster size with Rydberg Electron Transfer Spectroscopy. The localization properties of the cluster anions are investiagted with Density Functional Theory calculations