1. Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, College of Science, Shantou University, Shantou 515063, China
2. Department of Biochemistry and Molecular Biology, Comprehensive Building, Shantou University Medical College, Xinling Road 22, Shantou 515041, P. R. China
3. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China
4. Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering, Shantou 515063, P. R. China