1. Department of Chemistry Philipps University Marburg Hans-Meerwein Straße 4 35043 Marburg Germany
2. Materials Science Center (WZMW) Structure and Technology Laboratory (STRL) Hans-Meerwein Straße 6 35043 Marburg Germany
3. Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
4. Center for Materials Research (ZfM) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
5. Institute of Experimental Physics I Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
6. Department of Physics Philipps University Marburg Renthof 5 35032 Marburg Germany
7. Light Technology Institute Karlsruhe Institute of Technology Engesserstrasse 13 76131 Karlsruhe Germany
8. Institute of Physical Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
9. Institute of Theoretical Physics Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany