1. Department of Applied Chemistry, Graduate School of Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
2. Research Unit for Development of Organic Superconductors, and Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
3. Research Unit for Power Generation and Storage Materials, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
4. Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Naka-ku, Sakai, Osaka 599-8531, Japan
5. Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan