1. College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology 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. Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry Yonsei University Seoul 03722 Korea
3. Department of Chemistry Soonchunhyang University Asan 31538 Korea (Korea