1. Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
2. Department of Chemistry, Taiyuan Normal University, Jin Zhong 030619, P. R. China
3. Department of Electronic Science, Xiamen University, Xiamen 361005, P. R. China