1. Department of Molecular ElectronicsMax Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany
2. Institute of Physical ChemistryUniversity of Cologne Greinstrasse 4‐6 Cologne 50939 Germany
3. Institute for Polymer TechnologyBergische Universität Wuppertal Gaußstraße 20 Wuppertal 42119 Germany