1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 P. R. China
2. Department of Chemistry Institute of Molecular Plus Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300072 P. R. China
3. University of Chinese Academy of Science Beijing 100049 P. R. China
4. School of Materials Science & Engineering Nanchang University Nanchang 330031 P. R. China