Affiliation: | 1. Department of Chemistry, Tokyo Institute of Technology, SORST‐JST Agency, 2‐12‐1, O‐okayama, Megro‐ku, Tokyo, 152‐8551 (Japan), Fax: (+81)?3‐5734‐2788;2. Present address: Department of Chemistry, Faculty of Science, Gakushuin University, 1‐5‐1, Mejiro, Toshima‐ku, Tokyo, 152‐8551 (Japan) |