1. Laboratory of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena (Germany) and Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena (Germany)
2. Institut für Organische Chemie and Center for Nanosystems, Chemistry, Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)