Affiliation: | a Department of Chemistry and Materials Science, International Research Center of Macromolecular Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152 8552, Japan b Department of Organic and Polymeric Materials, International Research Center of Macromolecular Science, Tokyo Institute of Technology, Ookayama, Meguroku, Tokyo, Japan |