1. Division of Molecular Science, The Graduate School of Science and Technology, and Department of Chemical Science and Engineering, Faculty of Engineering, Kobe University, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan, and Engineer Application Research Section, Research and Development Division, Mitsuboshi Belting, Ltd., Hamazoe-dori, Nagata, Kobe 653-0024, Japan