1. Department of Applied Chemistry, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan; Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan, and Faculty of Engineering, Fukui University of Technology, 6-3-1 Gakuen, Fukui 910-8505, Japan