1. Contribution from the Department of Molecular Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan, Institute for Fundamental Chemistry, 34-4 Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606, Japan, Department of Polymer Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152, Japan, and Department of Chemical Technology, Kurashiki University of Science and the Arts, Kurashiki, Okayama 712, Japan