1. Department
of Chemistry, Philipps-University, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
2. Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Muelheim, Germany
3. Laboratory
of Physical Chemistry of Polymers and Membranes, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH B3 495 (Bâtiment CH) Station
6, CH-1015 Lausanne, Switzerland