1. State Key laboratory of Fine Chemicals; School of Chemistry; Dalian University of Technology; Dalian 116024 P. R. China
2. Graduate School of Life Science and Systems Engineering; Kyushu Institute of Technology; 2-4 Hibikino, Wakamatsu Kitakyushu Fukuoka 808-0196 Japan
3. Department of Physics; Peking University; Beijing 100871 P. R. China
4. School Petroleum and Chemical Engineering; Dalian University of Technology; Panjin Campus Panjin 124221 P. R. China