1. Institute
of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O.
Box 1385, 711 10 Heraklion, Crete, Greece
2. Department
of Chemistry, University of Crete, P.O. Box 2208, 710 03 Heraklion, Crete, Greece
3. Department
of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
4. Department
of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis
Zografrou, 15 771 Athens, Greece