1. Shaanxi Key Laboratory of High-Orbits-Electron Materials and Protection Technology for Aerospace, School of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710126, China
2. School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China
3. Research Center for Computational Science, Institute for Molecular Science, Okazaki 444-8585, Japan