1. Department of Chemistry, National Cheng Kung University, 1 Ta Hsueh Road, Tainan, Taiwan, Republic of China
2. National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, Taiwan, Republic of China
3. Institute
of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, Taiwan, Republic of China