1. Contribution from the Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, PRESTO, Japan Science and Technology Corporation (JST), Conversion and Control by Advanced Chemistry, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan, and the Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan