1. Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstraße 4 Garching D-85748 Germany
2. Centre for Disruptive Photonic Technologies; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
3. Chair of Theoretical Chemistry; Technical University Munich; Lichtenbergstraße 4 D-85748 Garching Germany
4. Department of Chemistry and Chemical Biology; Technische Universität Dortmund; Otto-Hahn-Str. 6 D-44227 Dortmund Germany