A Schiff-base derived colorimetric sensor with high performance for the detection of copper and cyanide ions and its real time application
- 1aDepartment of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632 014, India.
Abstract
A Schiff-base derived chromogenic probe 2-amino-3-((E)-4-hydroxy-3,5-dimethoxybenzylidene amino)maleonitrile (SYDA) has been synthesised successfully. Nuclear Magnetic Resonance (NMR) and High-Resolution Mass Spectrometry (HRMS) spectral analyses have been employed to characterise the synthesised sensing probe SYDA. The limit of detection for Cu2+ and CN− was found to be 19.2 nM and 94.5 nM, respectively, and the reaction time was less than 10 seconds. The interaction of the sensing probe with Cu2+ and CN− resulted in a significant colour change from colourless to pale yellow and yellow respectively. The colorimetric detection of Cu2+ and CN− was demonstrated using bottle images and paper strips. Further, the recognition of Cu2+ and CN− in the solid state, environmental water samples, and swab test kits were achieved.
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BibTeX
@article{karthikeyan2026schiffbase,
title = {{A Schiff-base derived colorimetric sensor with high performance for the detection of copper and cyanide ions and its real time application}},
author = {Nandhini Karthikeyan and Kulathu Iyer Sathiyanarayanan},
journal = {RSC Advances},
year = {2026},
month = sep,
doi = {10.1039/d6ra04531f},
url = {https://doi.org/10.1039/d6ra04531f},
note = {CC BY-NC 3.0},
}
RIS
TY - JOUR
TI - A Schiff-base derived colorimetric sensor with high performance for the detection of copper and cyanide ions and its real time application
AU - Nandhini Karthikeyan
AU - Kulathu Iyer Sathiyanarayanan
PY - 2026
DA - 2026/09/01
JO - RSC Advances
DO - 10.1039/d6ra04531f
UR - https://doi.org/10.1039/d6ra04531f
AB - A Schiff-base derived chromogenic probe 2-amino-3-((E)-4-hydroxy-3,5-dimethoxybenzylidene amino)maleonitrile (SYDA) has been synthesised successfully. Nuclear Magnetic Resonance (NMR) and High-Resolution Mass Spectrometry (HRMS) spectral analyses have been employed to characterise the synthesised sensing probe SYDA. The limit of detection for Cu2+ and CN− was found to be 19.2 nM and 94.5 nM, respectively, and the reaction time was less than 10 seconds. The interaction of the sensing probe with Cu2+ and CN− resulted in a significant colour change from colourless to pale yellow and yellow respectively. The colorimetric detection of Cu2+ and CN− was demonstrated using bottle images and paper strips. Further, the recognition of Cu2+ and CN− in the solid state, environmental water samples, and swab test kits were achieved.
SN - 2046-2069
ER -