1. Department of Chemistry, Faculty of Science and Engineering, Sophia University, Kioi-cho 7-1, Chiyoda-ku, Tokyo 102-8554, Japan, Department of Electronic Chemistry, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8554, Japan, and Laboratoire LI2C, Université Pierre et Marie Curie, 4 Place Jussieu 75252 Paris Cedex 05, France