应用化学 ›› 2020, Vol. 37 ›› Issue (7): 839-846.DOI: 10.11944/j.issn.1000-0518.2020.07.200004

• 研究论文 • 上一篇    下一篇

基于萘酰亚胺-苯并咪唑鎓的荧光传感器对H2PO-4的高选择性识别

董智云, 刘洋, 王迎进, 赵三虎, 席福贵*   

  1. 忻州师范学院化学系 山西 忻州 034000
  • 收稿日期:2020-01-02 出版日期:2020-07-01 发布日期:2020-07-07
  • 通讯作者: 席福贵,讲师; Tel/Fax:0350-3339205; E-mail:xifuguig@163.com; 研究方向:功能材料的设计与合成
  • 基金资助:
    国家自然科学基金(21701137)和山西省1331工程重点学科建设计划经费(2019)资助

Naphthalimide-Benzimidazolium Based Fluorescent Chemosensor for Highly Selective Recogniton of H2PO-4

DONG Zhiyun, LIU Yang, WANG Yingjin, ZHAO Sanhu, XI Fugui*   

  1. Department of Chemistry,Xinzhou Teachers University,Xinzhou,Shanxi 034000,China
  • Received:2020-01-02 Published:2020-07-01 Online:2020-07-07
  • Contact: XI Fugui, lecturer; Tel/Fax:0350-3339205; E-mail:xifuguig@163.com; Research interests:synthesis and design of function materials
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21701137), and the Shanxi “1331 Project” Key Subjects Construction(2019)

摘要: 设计合成了基于萘酰亚胺-咪唑鎓的受体分子1和2,通过荧光发射光谱研究了受体分子1和2对阴离子F-、Cl-、Br-、I-、AcO-、HSO-4、H2PO-4、NO-3、ClO-4的识别性能。 研究发现,在受体分子1和2的乙腈溶液(5.0×10-6 mol/L)中加入10倍化学计量的H2PO-4时,受体分子1的荧光猝灭率高达98%,受体分子2的荧光猝灭率仅为24%。 表明具有多重识别位点的受体分子1在构型上与H2PO-4更匹配,可作为H2PO-4的荧光关闭型(turn-off)探针。 受体分子1与H2PO-4的结合比为1∶1,结合常数为(1.25±0.11)×105 L/mol,检出限为6.90×10-6 mol/L。

关键词: 苯并咪唑鎓, 萘酰亚胺, H2PO-4, 荧光传感器

Abstract: Two novel naphthalimide-benzimidazolium based receptors 1 and 2 were synthesized. The anion (F-, Cl-, Br-, I-, CH3COO-, HSO-4, H2PO-4, ClO-4, NO-3) binding properties of two receptors were evaluated in CH3CN by fluorescence spectroscopy. Two receptors display fluorescent quenching effect with H2PO-4 and the quench percentages for receptors 1 and 2 are 98%and 24%, respectively. The results indicate that receptor 1 is more closely matched to H2PO-4 in configuration, and receptor 1 behaves as a “turn-off” fluorescence sensor for H2PO-4. Job-plot shows that receptor 1 and H2PO-4 form a 1∶1 complex, and the binding constant is (1.25±0.11)×105 L/mol, the detection limit is 6.90×10-6 mol/L.

Key words: benzimidazolium, naphthalimide, H2PO-4, fluorescent sensor