Issue 5, 2019

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

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

Supplementary files

Article information

Article type
Paper
Submitted
20 Nov. 2018
Accepted
11 Dec. 2018
First published
11 Dec. 2018

Anal. Methods, 2019,11, 642-647

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, 11, 642 DOI: 10.1039/C8AY02526F

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