1. State
Key Laboratory of Chemical Resource Engineering, Institute of Materia
Medica, College of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China
2. Center
for Combustion Energy and Department of Thermal Engineering, Tsinghua University, Beijing 100084, P. R. China
3. Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States