1. Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
2. Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
3. Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry Yonsei University Seoul 03722 Korea