Fast, Selective Detection of Fluoride in Drinking Water

  • Author: ChemistryViews.org
  • Published: 12 February 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Fast, Selective Detection of Fluoride in Drinking Water

Fluoride can help to prevent tooth decay. In some regions, it is added to the drinking water for this reason. However, fluoride can also enter the water supply by other means, e.g., by leaching from minerals or contamination with industrial waste. Its overconsumption can cause health issues, particularly in children. Simple fluoride sensors could, thus, be useful, e.g., to check the safety of drinking water in remote regions.


Kyriakos C. Stylianou, Ecole Polytechnique Fédérale de Lausanne (EPFL), Sion, Switzerland, and colleagues have developed a lanthanide-based luminescent metal–organic framework (MOF) for the detection of fluoride. The team designed the MOF, named SION-105, with a boron receptor in the active site that attracts fluoride electrostatically. The active site is surrounded by bulky substituents, which prevent larger ions from interacting with the boron center and ensures the selective detection of F. The metal used in the framework is EuIII, which causes a red luminescence. This luminescence is quenched when the MOF interacts with F.


The MOF was prepared by combining a tris(p-carboxylic acid)tridurylborane ligand (H3tctb) and Eu(NO3)3·6H2O in a mixture of dimethylformamide (DMF) and water at 120 °C. The resulting crystals can be ground into powder, suspended in tetrahydrofuran (THF), and combined with a water sample. The luminescence quenching can be observed using a portable, miniaturized fluorimeter device developed by the researchers. This allows a fast and user-friendly measurement of fluoride levels. Due to the noncovalent interaction with the fluoride ions, the MOF can be recycled and reused.


 

Article Views: 496

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH