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. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian 350007, P. R. China
3. Fujian College, University of Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China