1. Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
2. Department of Physics, School of Science, East China University of Science & Technology, Shanghai 200237, PR China
3. Shanghai Taoe Chemical Technology Company, Ltd., Shanghai 200030, PR China