1. FO. R. T. H., Institute of Electronic Structure & Laser, 71110 Heraklion Crete, Greece
2. Dept.
of Chemistry, University of Crete, 71003 Heraklion, Greece
3. Dept. of Material Science & Technology, University of Crete, 71003 Heraklion, Greece
4. N.H.R.F, Theoretical and Physical Chemistry Institute, 11635 Athens, Greece
5. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany