1. School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, Jilin, P. R. China
2. Institute of Functional Material Chemistry, School of Chemistry, Northeast Normal University, Changchun 130024, Jilin, P. R. China
3. Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China