1. Otto-Schott-Institute of Materials Research, Friedrich-Schiller-University Jena, Fraunhoferstr. 6, 07743 Jena, Germany
2. Institut des Sciences Moléculaires - CNRS UMR 5255, Université de Bordeaux, 33405 Talence, France
3. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constaniou Ave., 116 35 Athens, Greece