1. State Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fuzhou Fujian 350002 P. R. China
2. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 P. R. China
3. School of Chemical SciencesUniversity of Chinese Academy of SciencesChinese Academy of Sciences Beijing 100039 P. R. China
4. National Laboratory of Solid State MicrostructuresSchool of Electronic Science and EngineeringNanjing University Nanjing 210093 P. R. China