1. Air Force Research Laboratory, Space Vehicle
Directorate, Kirtland AFB, Albuquerque, New Mexico 87117, United States
2. Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
3. Institut
für Physikalische Chemie, Universität Göttingen, Tammannstrasse
6, D-37077 Göttingen, Germany
4. Max-Planck-Institut für Biophysikalische Chemie, D-37077 Göttingen, Germany