应用化学 ›› 2020, Vol. 37 ›› Issue (1): 80-87.DOI: 10.11944/j.issn.1000-0518.2020.01.190165

• 研究论文 • 上一篇    下一篇

基于蒽-苯并咪唑鎓的荧光传感器对H2PO4-的高选择性识别

董智云,张晓宇,曾政权,席福贵()   

  1. 忻州师范学院化学系 山西 忻州 034000
  • 收稿日期:2019-06-05 接受日期:2019-09-05 出版日期:2020-01-08 发布日期:2020-01-08
  • 通讯作者: 席福贵
  • 基金资助:
    山西省1331工程重点学科建设计划经费(2019)资助

Anthracene-Benzimidazolium Based Fluorescent Chemosensor for Highly Selective Recogniton of H2PO4-

DONG Zhiyun,ZHANG Xiaoyu,ZENG Zhengquan,XI Fugui()   

  1. Department of Chemistry, Xinzhou Teachers University,Xinzhou,Shanxi 034000,China
  • Received:2019-06-05 Accepted:2019-09-05 Published:2020-01-08 Online:2020-01-08
  • Contact: XI Fugui
  • Supported by:
    Supported by the Shanxi “1331 Project” Key Subjects Construction(2019)

摘要:

设计合成了基于蒽-苯并咪唑鎓的受体分子12,通过荧光发射光谱研究了受体分子12对F-、Cl-、Br-、I-、AcO-、HSO4-、H2PO4-、NO3-、ClO4-等阴离子的识别性能。 研究发现,在受体分子12的乙腈溶液(5.0×10-6 mol/L)中加入10倍化学计量的H2PO4-时,受体分子1的荧光猝灭百分数为13%,受体分子2的荧光猝灭百分数高达94%,表明受体分子2在构型上与H2PO4-更匹配,可作为H2PO4-的荧光关闭型(turn-off)探针。 受体分子2与H2PO4-的结合比为1:1,结合常数为(3.70±0.16)×104 L/mol,检出限为3.77×10-6 mol/L。

关键词: 蒽, 苯并咪唑鎓, 磷酸二氢根, 荧光探针

Abstract:

Two novel anthracene-benzimidazolium based receptors 1 and 2 were synthesized. The anion (F-, Cl-, Br-, I-, AcO-, HSO4-, H2PO4-, ClO4-,NO3-) binding properties of receptors 1 and 2 were evaluated in acetonitrile by fluorescence spectroscopy. The receptors 1 and 2 display fluorescent quenching effect with H2PO4-, the quench percentage for receptor 1 is 13%,and for receptor 2 is as much as 94%. The results indicate that receptor 2 is more closely matched to H2PO4- in configuration, and receptor 2 can behave as a “turn-off” fluorescence sensor for H2PO4-. Job-plot shows that receptor 2 and H2PO4- form a 1:1 complex, the binding constant is (3.70±0.16)×104 L/mol, and the detection limit is 3.77×10-6 mol/L.

Key words: anthracene, benzimidazolium, dihydrogen phosphate, fluorescent chemosensor