1. Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan, Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, Honjo-machi, Saga 840-8502, Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba Center 5, Tsukuba, Ibaraki 305-8565, Japan, and Materials Science Research Laboratory, Central Research Institute of Electric Power Industry, 2-11-1, Iwado-kita, Komae, Tokyo 201-8511, Japan