1. Department
of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, Republic of China
2. Department
of Chemistry, National Taiwan University. Taipei, Taiwan 10617, Republic of China
3. Institute
of Chemistry, Academia Sinica, Taipei, Taiwan 11529, United States
4. National Synchrotron Radiation Research Center, Hsinchu, Taiwan 30076, Republic of China