1. Leibniz‐Institut für Polymerforschung Dresden e.V. Hohe Str. 6 Dresden 01069 Germany
2. Department of Research and Development ROTOP Pharmaka Ltd. Bautzner Landstraße 400 Dresden 01328 Germany
3. Organic Chemistry of Polymers Technische Universität Dresden 01062 Germany
4. Hubei Institute of Aerospace Chemotechnology 1 Chunyuan Road, Fancheng District Xiangyang 441003 P. R. China