1. Department of Chemistry and Material Science, Langfang Normal University, Langfang 065000, Hebei, P. R. China
2. Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
3. Department of Chemistry, Taizhou University, Taizhou 318000, Zhejiang, P. R. China
4. Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Tsinghua East Road No. 35, Beijing100083, China