Abstract
The sensor with electron donor phenothiazine-2-carbaldehyde and electron acceptor indolium carboxylic acid, is developed with an intramolecular charge transfer transition between them. The synthesized molecule senses cyanide ion in water. The cyanide ion reacts with the molecule via nucleophilic addition in the indolium ring with a noticeable purple to colorless change in the solution observed. Also with the cyanide ion interaction, the sensor exhibits change in UV-visible absorption and fluorescence spectra. While the other ion does not show spectral and visual changes when interacts with the sensor molecule. Also the interference study reveals that the molecule is highly selective towards cyanide ion. Different source of water samples confirms the CN− ion sensing efficiency of the molecule. 1:1 interaction between the molecule PTI and cyanide ion is confirmed from the results of Jobs plot, 1H NMR and HRMS. Paper strips were prepared and this can act as a simple tool to sense cyanide ion in various water samples.
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Acknowledgements
The authors acknowledge the Researchers supporting project number (RSP2024R465), King Saud University, Riyadh, Saudi Arabia for funding this research.
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The authors extend their appreciation to the Researchers supporting project number (RSP2024R465), King Saud University, Riyadh, Saudi Arabia.
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Jayasudha Palanisamy: Methodology, Investigation, Formal analysis, Visualization, Writing - original draft.Rajakrishnan Rajagopal: Investigation, Writing - review & editing.Ahmed Alfarhan: Investigation, Writing - review & editing.
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Palanisamy, J., Rajagopal, R. & Alfarhan, A. Selective and Effective Sensing of Cyanide Ion with no Interference in Water by Phenothiazine-indolium Fused Optical Sensor. J Fluoresc (2024). https://doi.org/10.1007/s10895-024-03715-8
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DOI: https://doi.org/10.1007/s10895-024-03715-8