TAO Jie1, LIU Xiong1, LI Yuan-Rong2**, LIU Xiao-Si3
1.The High School Affiliated to Yunnan Normal University, Kunming 650500,China;
2.School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China;
3.The High School Affiliated to Yunnan Minzu University, Kunming 650031,China