1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
2. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
3. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China