Affiliation: | 1. Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2‐1 Yamadaoka, Suita 565‐0871 (Japan), Fax: (+81)?6‐6879‐7930;2. Present address: Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto 610‐0321 (Japan);3. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka 560‐0043 (Japan) |