1. Chongqing Key Laboratory of inorganic functional materials
2. College of chemistry
3. Chongqing normal university
4. Chongqing
5. P.R. China
6. Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials
7. College of Chemistry and Chemical Engineering
8. Huaiyin Noraml University
9. Huaian 223300
10. China