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Colorimetry is an advantageous method for detecting fluoride in drinking water in a resource-limited context, e. g., in parts of the developing world where excess fluoride intake leads to harmful health effects. Here we report a selective colorimetric chemosensor for fluoride that employs an azulene as the reporter motif and a pinacolborane as the receptor motif. The chemosensor, NAz-6-Bpin, is prepared using the Nozoe azulene synthesis, which allows for its rapid and low-cost synthesis. The chemosensor gives a visually observable response to fluoride both in pure organic solvent and also in water/alcohol binary solvent mixtures.

Original languageEnglish
Article number10
JournalFrontiers in Chemistry
Publication statusPublished - 29 Jan 2020


  • azulene
  • boron
  • colorimetric
  • fluoride
  • sensor
  • water sensing

ASJC Scopus subject areas

  • Chemistry(all)


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