1. Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93040 Regensburg, Germany
2. Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
3. Department of Physics, University of Pavia, Via Bassi 6, 27100 Pavia, Italy
4. PhotoGreen Lab, Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy