1. Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan, andMaterials & Chemicals Research Laboratory, Research & Development Center, Idemitsu Petrochemical Co., Ltd, 1-1 Anesaki-kaigan, Ichihara-city, Chiba 299-0193, Japan