1. Department
of Chemistry, National Taiwan University, Taipei 106, Taiwan
2. Mitsubishi Chemical
Group, Science and Technology Research Center, Inc., Yokohama, Kanagawa 227-8502, Japan
3. National Synchrotron
Radiation Research Center, Hsinchu 300, Taiwan
4. School
of Chemistry, University of St Andrews, St Andrews, KY16 9ST, United Kingdom