1. Shanghai Key Lab of Electrical Insulation and Thermal Aging; School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; No. 800 Dongchuan Rd. Minhang District Shanghai 200240 China
2. Institute of Chemistry; Chinese Academy of Sciences; Zhongguancun North First Street 2 Haidian District Beijing 100190 China
3. Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; No. 345 Lingling Road Shanghai 200032 China
4. Department of Chemistry; The Hong Kong University of Science and Technology (HKUST); Clear Water Bay Kowloon, Hong Kong China