Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (1): 80-87.DOI: 10.11944/j.issn.1000-0518.2020.01.190165

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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)

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