1. Key Laboratory of Theoretical Organic Chemistry and Functional Molecular, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China and Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2. Department of Mathematics and Physics, North China Electric Power University, Beinong Road 2, Changping, Beijing 102206, People’s Republic of China
3. Beijing Kein Research Center for Natural Sciences, Beijing 100022, People’s Republic of China