1. Institute for Organic Chemistry University of Freiburg Albertstraße 21 79104 Freiburg Germany
2. Center for Organic Photonics and Electronics Research OPERA Kyushu University 744 Motooka, Nishi 819-0395 Fukuoka Japan
3. Institute for Organic Chemistry and Biochemistry University of Bonn Gerhard-Domagk-Str. 1 53121 Bonn Germany
4. Freiburg Materials Research Center University of Freiburg Stefan-Meier-Str. 21 79104 Freiburg Germany
5. Freiburg Center for Interactive Materials and Bioinspired Technologies University of Freiburg Georges-Köhler-Allee 105 79110 Freiburg Germany