Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan, Institute for Advanced Materials Research, Hiroshima University, Higashi-Hiroshima 739-8530, Japan, and Functional Chemicals R&D Laboratories Nippon Kayaku Co., Ltd., 3-31-12 Shimo, Kita-ku, Tokyo 115-8588, Japan(2007-11-29時点)
