1. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10617, Taiwan
2. Molecular Science and Technology, Taiwan International Graduate Program, Academia Sinica, Taipei 10617, Taiwan
3. Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
4. Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan