1. Department of Chemistry, Faculty of Science and Technology, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan, Sensor Photonics Research Center, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan, and Dipartimento di Chimica Organica, Universita di Pavia, Via Taramelli 10, Pavia 27100, Italy