1. Research and Management Division, Toray Industries, Inc., 1-1-1 Sonoyama, Otsu, Shiga 520-8558, Japan, Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, Department of Chemical Engineering, Tunghai University, Taichung, Taiwan, and Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152, Japan