1. Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522,
Japan
2. Department of Chemistry,
Faculty
of Mathematics and Science, University of Indonesia, Kampus UI Depok, Jakarta 16-424, Indonesia
3. Nikka Micron Co., Ltd., Waseda, Misato, Saitama 341-0018, Japan
4. JST CREST, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan