1. Department of Applied Chemistry, School of Science and Technology, Meiji University, Higashimita, Tama, Kawasaki 214-8571, Japan, Graduate School of Materials Science, Japan Advanced Institute of Science and Technology, Asahidai, Nomi, Ishikawa 923-1292, Japan, and Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan