1. Department of Applied Chemistry, Faculty of Engineering, Sanyo-Onoda City University, Daigaku-dori, 1-1-1, Sanyo-Onoda, Yamaguchi 756-0884, Japan
2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
3. Professor Emeritus, Tokyo University of Science Yamaguchi, Japan