1. Department of Chemistry, National Central University, Jhongli, Taiwan 320, Republic
of China
2. Laboratoire CRISMAT,
ENSICAEN, Université de Caen-Basse Normandie, 6 Bd Maréchal
Juin, 14050 Caen Cedex, France
3. Institute of Chemistry, Academia Sinica, Taipei, Taiwan 115, Republic of China