1. Key Laboratory for Advanced Materials Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China
2. 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 and Technology Shanghai 200237 P.R. China
3. Physics Department and Shanghai Key Laboratory of Magnetic Resonance School of Physics and Materials Science East China Normal University Shanghai 200062 P. R. China