1. College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education Nankai University Tianjin 300071 P. R. China
2. College of Chemistry Key Laboratory of Functional Polymer Materials (Ministry of Education) State Key Laboratory of Elemento‐Organic Chemistry Tianjin 300071 P. R. China
3. Organic Chemistry Institute and Center for Soft Nanoscience (SoN) Westfälische Wilhelms‐Universität Münster Busso‐Peus‐Straße 10 Münster 48149 Germany