1. Department of Chemistry Graduate School of Science Tohoku University 980-8578 Sendai Japan
2. Present address: Research Group of Solid Material Chemistry Graduate School of Science Hiroshima University 1-3-1 Kagamiyama, Higashihiroshima Hiroshima 739-8526 Japan
3. Department of Applied Physics Nagoya University Chikusa-ku Nagoya 464-603 Japan
4. Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW UK
5. Department of Pure and Industrial Chemistry University of Nigeria Nsukka 410001 Enugu State Nigeria
6. Research & Utilization Division (Japan) Synchrotron Radiation Research Institute 1-1-1 Kouto, Sayo Sayou-gun Hyogo 679-5198 Japan
7. Electronic Functional Macromolecules Group National Institute for Materials Science (NIMS) Tsukuba 305-0044 Japan
8. School of Materials Science and Engineering Nankai University Tianjin 300350 China
9. WPI-Advanced Institute for Materials Research (AIMR) Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan