1. Center for Nanosystems Chemistry (CNC), Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
2. Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
3. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology (SCUT), 510640 Guangzhou, China