1. College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province,
P. R. China
2. Department
of Chemistry and the
Brockhouse Institute for Materials Research (BIMR), McMaster University, Hamilton, Ontario, Canada L8S 4M1
3. Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, and Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan 411105, P. R. China