1. Department of Materials Science, Shizuoka University, Hamamatsu, Shizuoka 432-8561, Japan, Institute for Molecular Science, Okazaki, Aichi 444-8585, Japan, Numazu College of Technology, 3600 Ooka Numazu 410-8501, Japan, and Saga University, Honjo-machi 1, Saga 840-8502, Japan