1. Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
2. College of Chemistry and Chemical Engineering, Yunnan Normal University, Yunnan Kunming 650500, P. R. China
3. College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China