Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (7): 841-847.DOI: 10.11944/j.issn.1000-0518.2016.07.150348

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A Coumarin 343 Basded Fluorescent Probe for Fast Sensing of Sulfite Ion

WANG Jiaoliang(),LONG Liping,XIE Dan   

  1. College of Chemistry and Environment Engineering,Hu'nan City University,Yiyang,Hu'nan 413000,China
  • Received:2015-09-28 Accepted:2016-01-12 Published:2016-06-30 Online:2016-06-30
  • Contact: WANG Jiaoliang
  • Supported by:
    Supported by NSFC(No.201502048, No.21545003), the Natural Science Foundation of Hu'nan Province(No.2015JJ2023), the Outstanding Youth Project of the Education Department of Hu'nan Province(No.14B036)

Abstract:

The probe, Coumarin 343-SO2, was readily synthesized from Coumarin 343 and 2-benzothiazole acetonitrile. The structure of this probe was fully characterized by 1H NMR, 13C NMR, MS, and HRMS. The mechanism of this fluorescent probes for SO32- is based on blocking conjugated structure of the benzothiazole and coumarin upon SO32- nucleophilic addition. The probe exhibits excellent water solubility, fast response, high sensitivity, and high selectivity over other biological related species, with the low detection limit at 0.08 μmol/L. In addition, the probe has good cell membrane permeability, and is suitable for fluorescence imaging of SO32- in living cells.

Key words: coumarin 343, fluorescence probe, sulfite ion, cell imaging