1. Department
of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan
2. Department
of Chemistry, Faculty of Science, Toho University, Miyama, Funabashi, Chiba 274-8510, Japan
3. Institute
for Solid
State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan