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A fluorescent colorimetric azo dye based chemosensor for detection of S2- in perfect aqueous solution and its applications in real sample analysis and molecular logic gate

Abstract

A simple azo-dye based bis-Schiff base chemosensor L has been designed, synthesized and characterized by NMR, IR spectroscopy, ESI-MS and elemental analyses. The chemosensor L can successfully detect sulfide ion both visually and spectro-photometrically in perfect aqueous medium as well as in organic aqueous mixture through de-protonation mechanism.The detection limit reachesupto 16 µM in pure aqueous medium (1.7 µM by UV-Vis titration, 3.35 x 10-7M by fluorescence titration in 1:1 DMSO-H2O mixture), which is lowest ever known in the family of Schiff base chemosensor for sulfide ion. The other interfering anions (F−, Cl−, Br−, HSO3-, N3-, PO43-, NO3-, OAc−, CO32- and CN-) exhibited no interference for detection of sulfide ion. The mechanism of interaction between the L and sulphide ion has further been confirmed by DFT studies. The chemosensor L has also been applied for real sample analysis and in building molecular logic gate.

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Publication details

The article was received on 04 Mar 2018, accepted on 09 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C8AY00470F
Citation: Anal. Methods, 2018, Accepted Manuscript
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    A fluorescent colorimetric azo dye based chemosensor for detection of S2- in perfect aqueous solution and its applications in real sample analysis and molecular logic gate

    A. K. Manna, J. Mondal, R. Chandra, K. Rout and G. K. Patra, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C8AY00470F

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