1. College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of the Assembly and Application of Organic Functional molecules of Hunan Province Hunan Normal University Changsha 410081 China
2. Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
3. Center for Instrumental Analysis Niigata University Nishi-ku Niigata 950-2181 Japan