1. Key Laboratory of Synthetic and Nature Functional Molecule Chemistry (Ministry of Education); College of Chemistry and Materials Science; Northwest University; Xi'an 710127 P.R. China
2. Department of Chemistry and Chemical Engineering; Ankang University; Ankang, Shaanxi 725000 P.R. China
3. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application International Cooperation Base; Institute of Photonics and Photon-Technology; Northwest University; Xi'an 710069 P. R. China