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A highly selective and instantaneously responsive Schiff base fluorescent sensor for the “turn-off” detection of iron(III), iron(II), and copper(II) ions

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Abstract

A new and tri-responsive fluorescent Schiff base probe (DBAB) has been designed and developed for the recognition of iron(III) ions (Fe3+), iron(II) ions (Fe2+) and copper(II) ions (Cu2+) simultaneously. This sensor displays a favorable selectivity for Fe3+, Fe2+ and Cu2+ ions over a range of other common metal cations in DMF solution, leading to prominent fluorescence on–off. The detection limits were 2.17 × 10−6 M for Fe3+, 2.06 × 10−6 M for Fe2+ and 2.48 × 10−6 M for Cu2+ respectively. This tri-responsive fluorescent probe for Fe3+, Fe2+ and Cu2+ was distinguished by further reduction of the ascorbic acid. The recognition mechanism of DBAB toward Fe3+, Fe2+ and Cu2+ has been investigated in detail by Job plot measurements and 1H NMR.

Graphical abstract: A highly selective and instantaneously responsive Schiff base fluorescent sensor for the “turn-off” detection of iron(iii), iron(ii), and copper(ii) ions

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Publication details

The article was received on 20 Nov 2018, accepted on 11 Dec 2018 and first published on 11 Dec 2018


Article type: Paper
DOI: 10.1039/C8AY02526F
Citation: Anal. Methods, 2019, Advance Article
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    A highly selective and instantaneously responsive Schiff base fluorescent sensor for the “turn-off” detection of iron(III), iron(II), and copper(II) ions

    X. Zhu, Y. Duan, P. Li, H. Fan, T. Han and X. Huang, Anal. Methods, 2019, Advance Article , DOI: 10.1039/C8AY02526F

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