1. Center for Combustion Energy, Department of Energy and Power Engineering, and Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing100084, China
2. Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MinnesotaMN55455-0431, United States
3. Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut06492, United States