1. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Longpan Road 159 Nanjing 210037 China
2. Physics Department Shanghai Key Laboratory of Magnetic Resonance East China Normal University Shanghai 200062 China
3. Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT Peking University Beijing 100871 China
4. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences ETH Zurich 8093 Zurich Switzerland