1. Department
of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
2. Science
Institute, University of Iceland, VR-III, 107, Reykjavik, Iceland
3. Department
of Physics, Albanova, Stockholm University, S-106 91 Stockholm, Sweden
4. Department
of Chemistry, Linköping University, SE-581 83 Linköping, Sweden
5. Department
of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
6. Lehrstuhl
Physikalische Chemie II, Ruhr-Universität Bochum, 44801 Bochum, Germany
7. Engineering
Laboratory, University of Cambridge, Trumpington Street, Cambridge CB21PZ, United Kingdom
8. Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States