1. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China); Key Laboratory of Application and Assemble of Organic Functional Molecules; Hunan Normal University; Changsha 410081 China
2. Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 03722 Korea
3. Department of Chemistry; Graduate School of Science Kyoto University; Sakyo-ku Kyoto 606-8502 Japan