1. Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, People’s Republic of China
2. National
Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic
Resonance and Atomic and Molecular Physics and Mathematics, Wuhan
Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People’s Republic of China
3. SINOPEC, Beijing 100027, People’s Republic of China