1. Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 10, Darmstadt 64289, Germany
2. Department of Organic Materials Science, Yamagata University, 4-3-16 Jonan Yonezawa, Yamagata-ken 992-8510, Japan
3. Department of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
4. European Synchrotron Radiation Facility, CS 40220, Grenoble Cedex
9, France