Selective and sensitive fluorescent and colorimetric chemosensor for detection of CO32- anions in aqueous solution and living cells

Talanta. 2018 Oct 1:188:614-622. doi: 10.1016/j.talanta.2018.06.036. Epub 2018 Jun 15.

Abstract

A new colorimetric and fluorescent chemosensor for visual determination of carbonate ions was developed by the microwave assisted solvent free synthesis of 7,8-dihydroxy-3-(4-methylphenyl) coumarin (DHMC). The structural characterization of DHMC was confirmed by microanalysis and spectroscopy methods (MALDI-TOF, FT-IR, 1H NMR, 13C NMR, and 2D HETCOR). The binding behaviors of DHMC were investigated towards various anions by UV-vis and fluorescence spectroscopy. DHMC showed a selective and sensitive fluorometric and colorimetric responses towards carbonate ion over other anions. The detection limit of CO32- was found to be 1.03 µM. Moreover, the fluorescence imaging in living cells suggests that DHMC has a great potential in the biological imaging application. It has been demonstrated that DHMC can be used as a rapid and reliable sensor for the determination of carbonate anion in a variety of practical applications.

Keywords: Carbonate; Chemosensor; Coumarin; Fluorescent sensor; Molecular sensing.

MeSH terms

  • Carbonates / analysis*
  • Carbonates / metabolism*
  • Colorimetry / methods*
  • Coumarins / chemical synthesis
  • Coumarins / chemistry
  • Coumarins / pharmacology*
  • Fluorescence
  • Fluorescent Dyes / chemical synthesis
  • Fluorescent Dyes / chemistry
  • Fluorescent Dyes / pharmacology*
  • Limit of Detection
  • Models, Chemical
  • Quantum Theory
  • Saccharomyces cerevisiae / metabolism
  • Spectrometry, Fluorescence / methods*

Substances

  • Carbonates
  • Coumarins
  • Fluorescent Dyes