Discovery of Fluoride-Sensing Biomaterials

Strategic Insights -

New research from the Indian Institute of Technology Hyderabad has led to the development of fluorescent probes that can selectively sense fluoride and hydroxide ions in water and living cells. The probes, made from naphthoimidazolium-based ionic salts, show promise in detecting fluoride contamination in water samples and can be used to monitor fluoride levels in biological systems. The research also demonstrates the practical utility of these probes in detecting fluoride ion in real water samples.

Key Takeaways:

  • The research team discovered two new naphthoimidazolium-based ionic salts, and, which exhibit fluorescence quenching behavior towards fluoride and hydroxide ions.
  • The probes were found to be highly selective for fluoride ion, with a limit of detection (LOD) of 4.01 x 10^(-10) M for F- ions and 1.29 x 10^(-9) M for OH- ions.
  • The probes were also demonstrated to work effectively in detecting fluoride ion in real water samples, as well as in living B16F10 cells.
  • The research team fabricated an LED bulb that can emit light with a predominantly greenish color, which can be used to detect fluoride presence in water samples.
  • The probes have potential applications in detecting fluoride contamination in water samples and monitoring fluoride levels in biological systems.

Statistics:

  • The LOD of probe for F- ions is 4.01 x 10^(-10) M.
  • The LOD of probe for OH- ions is 1.29 x 10^(-9) M.
  • The research demonstrates a 14-fold decrease in LOD for F- ions and a 38-fold decrease in LOD for OH- ions compared to the control probe.
  • The probes were tested with various anions and metal ions, with only TBAF and TBAOH salts able to quench the fluorescent spectra of at 471 nm.

Sources:

  • NewsRx. Indian Institute of Technology Hyderabad Reports Findings in Biomaterials (Selective Sensing of the Fluoride Ion in Water and B16F10 Cells by Naphthoimidazolium Salts). Chemicals & Chemistry. August 8, 2025; p 1653.
  • ACS Applied Bio Materials. Selective Sensing of the Fluoride Ion in Water and B16F10 Cells by Naphthoimidazolium Salts. 2025.