1. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
2. Department of Chemistry, University of Ioannina, 45110, Ioannina, Greece
3. Department of Chemistry, Nagoya University, Nagoya, 464-8602, Japan
4. Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan
5. Department of Chemistry, University of North Texas, 305070 Denton, TX 76203-5017, USA