1. Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of Education Department of Chemistry Huaibei Normal University Huaibei Anhui 235000 P. R. China
2. Advanced Research Institute and Department of Chemistry Taizhou University Taizhou Zhejiang 318000 P. R. China
3. Department of Applied Chemistry Anhui Polytechnic University Wuhu Anhui 241000 P. R. China