Affiliation: | 1. Department of Chemistry, Okayama University of Science, Ridai‐cho, Okayama 700‐0005, Japan, Fax: (+81) 86‐256‐9604;2. Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama 2, Meguro‐ku, Tokyo 152‐8551, Japan, Fax: (+81) 3‐5734‐3529 |