1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People’s Republic of China
2. School of Science, Changchun University of Science and Technology, Changchun 130022, People’s Republic of China
3. State Key Laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun 130023, People’s Republic of China
4. Computational Biology Center, IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA
5. Department of Chemistry, Columbia University, New York, New York 10027, USA