1. Department of Chemistry, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Molecular Photoscience Research Center, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan, Department of Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku, Tokyo 162-8601, Japan, and Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Honcho, Kawaguchi, Saitama 332-0012, Japan