Institution: | 1. Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, Republic of China, Fax: (+886) 3‐571‐1082;2. Current Address: Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China, Fax: (+886) 2‐2363‐6359;3. Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China;4. Institute of Chemistry, Academia Sinica, Taipei, Taiwan 115, Republic of China, Fax: (+886) 2‐2363‐6359 |