1. Department of Chemistry; School of Science; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
2. TDK Corporation; 2-15-7 Higashi-owada, Ichikawa Chiba 272-8558 Japan
3. Dowa Electronics Materials. Co.,Ltd.; 1-3-1 Kaigandori, Minami-ku Okayama 702-8506 Japan