1. International Superconductivity Technology Center, Shinonome Koto-ku Tokyo 135-0062, Japan, Department of Chemistry, Faculty of Science, Toho University, Miyama, Chiba 274-8510, Japan, Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152-8552, Japan, Institute for Molecular Science, Okazaki 444-0867, Japan, and Department of Chemistry, School of Science, The University of Tokyo, Tokyo 113-0035, Japan