Chinese Journal of Organic Chemistry ›› 2020, Vol. 40 ›› Issue (6): 1680-1688.DOI: 10.6023/cjoc201911008 Previous Articles     Next Articles


杨云汉, 保秋连, 罗建萍, 杨俊丽, 李灿花, 魏可可, 钏永明, 杨丽娟   

  1. 云南民族大学化学与环境学院 云南省高校智能超分子化学重点实验室 生物基材料绿色制备技术国家地方联合工程中心 昆明 650500
  • 收稿日期:2019-11-06 修回日期:2019-12-18 发布日期:2020-03-06
  • 通讯作者: 杨丽娟
  • 基金资助:

Competitive Fluorescence Sensing for Paraquat Based on Methylene Blue/Water-Soluble Phosphate Salt Pillar[5]arene

Yang Yunhan, Bao Qiulian, Luo Jianping, Yang Junli, Li Canhua, Wei Keke, Chuan Yongming, Yang Lijuan   

  1. Key Laboratory of Intelligent Supramolecular Chemistry at the University of Yunnan Province, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry & Environment, Yunnan Minzu University, Kunming 650500
  • Received:2019-11-06 Revised:2019-12-18 Published:2020-03-06
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 21562048, 21762051), the Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province and the Science Research Fund Project of Yunnan Provincial Department of Education (No. 2019Y0193).

Using water-soluble phosphate salt pillar[5]arene (PP5A) as the host and indicate dye methylene blue (MB) as the guest, the MB/PP5A host-guest inclusion complex was constructed. The fluorescence properties, complexation constants, complexation ratios and binding modes of PP5A and MB were studied. The inclusion complex was applied to competitive fluorescent sensing of paraquat (PQ). When MB is complexed with PP5A receptor, its fluorescence is quenched. When PQ is added to the MB/PP5A sensing system, PQ competes into the cavity of PP5A and MB is detached from the cavity of PP5A, which led to fluorescence recovery. This enables competitive fluorescence sensing of PQ. Therefore, the MB/PP5A fluorescence sensing system can detect PQ sensitively with a minimum detection limit of 3.6×10-7mol·L-1. The probe has the advantages of strong selectivity, simple and fast preparation, response in a wide pH range and good anti-interference performance, and can provide the basis for the sensing detection of PQ in organisms and environments.

Key words: water-soluble phosphate salt pillar[5]arene, methylene blue, inclusion complex, competitive recognition, paraquat