1. Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT); Georges-Köhler-Allee 105 79110 Freiburg Germany
2. Present address: Professur Polymerchemie; TU Chemnitz; Str. der Nationen 62 09111 Chemnitz Germany
3. Institute for Macromolecular Chemistry; Albert-Ludwigs-Universität Freiburg; Stefan-Meier-Strasse 79104 Freiburg Germany
4. Present address: Laboratoire Hétérochimie Fondamentale et Appliquée (UMR CNRS 5069); Université de Tolouse; UPS; 118, route de Narbonne, Bât. 2R1 31062 Toulouse France