1. Department of Applied Chemistry, Graduate School of EngineeringOsaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai Osaka 599-8531 Japan
2. The Research Institute for Molecular Electronic Devices (RIMED)Osaka Prefecture University 1-1 Gakuen-cho, Naka-ku, Sakai Osaka 599-8531 Japan
3. Department of Chemistry, Graduate School of ScienceTohoku University, Aoba-Ku Sendai 980-8578 Japan