1. Ganzhou Teacher's College, Ganzhou, Jiangxi 341000, P. R. China
2. Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou 341000, P. R. China
3. Ganzhou No. 3 Middle School, Ganzhou, Jiangxi 341000, China