A Schiff-base derived colorimetric sensor with high performance for the detection of copper and cyanide ions and its
Nandhini Karthikeyan1, Kulathu Iyer Sathiyanarayanan1
1Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology Vellore-632 014 India sathiyanarayanank@vit.ac.in.
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.
