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Visual detection of fluoride ion based on ICT mechanism
Sutapa Sahu1, Yeasin Sikdar1, Riya Bag1
1Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata, India.
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|February 6, 2019
Summary
A new chemosensor, H3NTS, enables rapid and precise fluoride (F-) detection. This sensor shows potential for real-world applications, including analyzing fluoride levels in toothpaste and paper strips.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Fluoride ion (F-) detection is crucial in various environmental and industrial applications.
- Development of selective and sensitive chemosensors is essential for accurate F- monitoring.
Purpose of the Study:
- To design and synthesize a novel chemosensor (H3NTS) for rapid and accurate F- detection.
- To evaluate the sensing capabilities of H3NTS for F- discrimination among other anions.
- To explore the potential of H3NTS in real-world sample analysis.
Main Methods:
- UV-Vis spectroscopy and Nuclear Magnetic Resonance (NMR) spectroscopy (1H, 13C) were employed for characterization.
- Computational calculations were performed to understand the sensing mechanism.
- Colorimetric assays were conducted to assess selectivity and sensitivity towards F-.
Main Results:
- The H3NTS probe demonstrated a selective colorimetric response to F- in acetonitrile.
- The detection limit for F- was found to be as low as 6 μM.
- A reversible colorimetric switch was achieved through sequential addition of F- and Ca2+ ions.
- H3NTS showed promising performance in analyzing F- in real samples like toothpaste and paper strips.
Conclusions:
- H3NTS serves as an effective colorimetric chemosensor for F- detection.
- The sensor exhibits high selectivity and sensitivity, with potential for practical applications.
- The reversible switching capability offers further advantages for F- sensing systems.
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