1. Chemical Resources Laboratory, Tokyo Institute of Technology, R1‐12, 4259 Nagatsuta, Midori‐ku, Yokohama 226‐8503 (Japan), Fax: (+81) 45‐924‐5275
2. Research and Development Initiative, Chuo University, 1‐13‐27, Kasuga, Bunkyo‐ku, Tokyo 112‐8551 (Japan), Fax: (+81) 3‐3817‐1631 http://www.chem.chuo‐u.ac.jp/∼ikedalab/index_e.html