1. Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, Karlsruhe 76128, Germany
2. Department of Organic Chemistry, Polymer Chemistry Research Group, Ghent University, Krijgslaan 281 (S4‐bis), Ghent 9000, Belgium