1. Kanagawa Academy of Science and Technology, 1583 Iiyama Atsugi, Kanagawa 243-02, Japan, Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-21, Japan, The Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153, Japan, and Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan