1. State
Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
2. Key
Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of
Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
3. Key Laboratory
of Advanced Energy Materials Chemistry (Ministry of Education), College
of Chemistry, Nankai University, Tianjin 300071, P. R. China