1. Laboratory of Organic and Macromolecular Chemistry; Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
2. Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
3. Dutch Polymer Institute; P.O. Box 902 Eindhoven 5600 AX The Netherlands