1. National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education, China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China
2. Key Laboratory of Light Energy Conversion Materials of Hunan Province College, Hunan Normal University, Changsha, Hunan 410081, China