1. Institute of Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany
2. Max Planck Graduate
Center, 55128 Mainz, Germany
3. Department of Physics, University of Ioannina, P.O. Box 1186, 45110 Ioannina, Greece
4. Macromolecular Chemistry Department, Technische Universität Darmstadt, Alarich-Weiss Str. 4, 64287 Darmstadt, Germany
5. Max Planck Institute
for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
6. Institute of Physics, Johannes Gutenberg University, Staudingerweg 7, 55128 Mainz, Germany