1. Organic Materials Research Division; Osaka Municipal Technical Research Institute; 1-6-50 Morinomiya, Joto-ku Osaka 536-8553 Japan
2. Mitsubishi Gas Chemical Company, Inc; Mitsubishi Building, 2-5-2 Marunouchi, Chiyoda-ku Tokyo 100-8324 Japan
3. Graduate School of Engineering; University of Hyogo; 2167 Shosha Himeji Hyogo 671-2201 Japan