1. College of Chemistry and Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, People's Republic of China
2. Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, People's Republic of China
3. Materials Science Institute, PCFM Laboratory, Sun Yat-sen University, 135 Xingang West Road, Guangzhou, Guangdong 510275, People's Republic of China