1. Laboratorium
für Physikalische Chemie, ETH Zürich, CH-8093 Zürich, Switzerland
2. Institute
for Molecules and Materials, Radboud University Nijmegen, Toernooiveld
1, 6525ED Nijmegen, The Netherlands
3. Service
de Chimie Quantique et Photophysique, Université Libre de Bruxelles (ULB) CP 160/09, 50 Av. F. D. Roosevelt, 1050 Brussels, Belgium
4. School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.