1. Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
2. Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum, 44801 Bochum, Germany
3. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan 10617, People’s Republic of China
4. Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Nangang, Taipei, Taiwan 11529, People’s Republic of China
5. Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, People’s Republic of China