1. Department of Chemistry; Katholieke Universiteit Leuven; Celestijnenlaan 200D and F 3001 Leuven Belgium
2. Polish Academy of Sciences; Institute of Molecular Physics; Smoluchowskiego 17 60-179 Poznań Poland
3. Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-; Université de Rennes 1; Campus de Beaulieu 35042 Rennes France