Issue 24, 2014

Water-soluble pyridine-based colorimetric chemosensor for naked eye detection of silver ions: design, synthesis, spectral and theoretical investigation

Abstract

A water soluble pyridine containing a Schiff base as chemosensor was designed and then synthesised. The chemosensor (L) was synthesized by reacting pyridoxal and 2-aminoethanol and then comprehensively characterized using elemental analysis, spectroscopic methods (infrared, ultraviolet-visible, nuclear magnetic resonance (1H-NMR and 13C-NMR) spectroscopy), electrospray ionization mass spectroscopy, and single crystal X-ray crystallography. The designed compound showed excellent specificity and sensitivity (detection limit = 4.18 × 10−6 M) towards Ag+ ions in preference to other interfering cations (Ca2+, Co2+, Cu2+, Fe2+, Fe3+, Hg2+, VO2+, K+, Li+, Mn2+, Na+, Ni2+, Pb2+ and Zn2+) in aqueous solution. The (L) showed a selective chromogenic behavior towards Ag+ ions by changing the color of the solution from light yellow to red, a change which can be detected with the naked eye. A simple and cost effective test kit was prepared for the detection of silver ion in water samples. Time-dependent density functional theory calculations were carried out to help understand the sensing mechanism.

Graphical abstract: Water-soluble pyridine-based colorimetric chemosensor for naked eye detection of silver ions: design, synthesis, spectral and theoretical investigation

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
04 Jul 2014
Accepted
10 Oct 2014
First published
14 Oct 2014

Anal. Methods, 2014,6, 9610-9615

Water-soluble pyridine-based colorimetric chemosensor for naked eye detection of silver ions: design, synthesis, spectral and theoretical investigation

B. Annaraj and M. A. Neelakantan, Anal. Methods, 2014, 6, 9610 DOI: 10.1039/C4AY01592D

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