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. 2025 Jan;35(1):221-236.
doi: 10.1007/s10895-023-03512-9. Epub 2023 Nov 28.

Colorimetric Detection of Cu2+ and Ag+ Ions Using Multi-Responsive Schiff Base Chemosensor: A Versatile Approach for Environmental Monitoring

Gasem Mohammad Abu-Taweel  1 , Hamed M Al-Saidi  2 , Mubark Alshareef  3 , Mohsen A M Alhamami  4 , Jari S Algethami  5   6 , Salman S Alharthi  7
Affiliations

Colorimetric Detection of Cu2+ and Ag+ Ions Using Multi-Responsive Schiff Base Chemosensor: A Versatile Approach for Environmental Monitoring

Gasem Mohammad Abu-Taweel et al. J Fluoresc. 2025 Jan.

Abstract

In this study, we have synthesized a novel Schiff base-centered chemosensor, designated as SB, with the chemical name ((E)-1-(((6-methylbenzo[d]thiazol-2-yl) imino)methyl)naphthalen-2-ol). This chemosensor was structurally characterized by FT-IR, 1H NMR, UV-Vis and fluorescence spectroscopy. After structural characterization the chemosensor SB was subsequently employed for the detection of Cu2+ and Ag+, using fluorescence spectroscopy. The chemosensor SB showed excellent ability to recognize the target metal ions, leading to fluorescence enhancement and color change from yellow to yellowish orange for Cu2+ and yellow to radish for Ag+ ions. The detection capabilities of this chemosensor were impressive, showing excellent selectivity and an exceptionally low detection limit of 0.0016 µM for Cu2+ and 0.00389 µM for Ag+. Most notably, our approach enables the quantitative detection both metal ions in different water and soil samples at trace level. This achievement holds great promise for analytical applications and offers significant contributions to the field of chemical sensing and environmental protection.

Keywords: Chemosensor; FT-IR; Metal ions; Schiff base; UV-vis spectroscopy.

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Conflict of interest statement

Declarations. Ethical Approval: This article does not contain any studies with human participants or animals, clinical trial registration, or plant reproducibility performed by any authors. Consent to Publish: The authors have approved the paper and agree with its publication. Consent to Participate: No applicable. Competing Interests: The authors declare no competing interests.

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