1. Contribution from the Department of Chemistry, Graduate School of Science, Kyoto University, and Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation, Sakyo-ku, Kyoto 606-8502, Japan, Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and Institute of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan