1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
2. Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
3. Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, United States
4. CCDC Army Research Laboratory, FCDD-RLS-DE, Adelphi, Maryland 20783, United States
5. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States