1. Department of Chemistry, Division of Advanced Materials Science, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang Accelerator Laboratory, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science & Technology (POSTECH), Pohang 790-784, Republic of Korea
2. Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-24 Ookayama, Meguro-ku, Tokyo 152-8552, Japan