1. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
3. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China
4. Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433, P. R. China
5. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, P. R. China
6. Department of Chemistry and Research institute for Basic Sciences, Kyung Hee University, Seoul 02447, Republic of Korea
7. Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States