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Issue 2, 2020
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A selective “turn-on” sensor for recognizing In3+ and Zn2+ in respective systems based on imidazo[2,1-b]thiazole

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Abstract

A new simple and easily synthesized multitarget sensor, (E)-N′-(4-(diethylamino)-2-hydroxybenzylidene)imidazo[2,1-b]thiazole-6-carbohydrazide (X), was designed and synthesized using imidazo[2,1-b]thiazole-6-carboxylic acid and 4-(diethylamino)-2-hydroxybenzaldehyde. X could be used as a sensor to detect In3+ in DMF–H2O buffer solution and detect Zn2+ in EtOH–H2O buffer solution through fluorescence enhancement with detection limits of 1.02 × 10−9 M and 5.5 × 10−9 M, respectively. X exhibited an efficient “off–on–off” fluorescence behavior by cyclic addition of metal ions (In3+ and Zn2+) and EDTA. The stoichiometry between X and metal ions (In3+ and Zn2+) was 1 : 1. The binding mode and sensing mechanism of X with metal ions (In3+ and Zn2+) was verified by theoretical calculations using Gaussian 09 based on B3LYP/6-31G(d) and B3LYP/LANL2DZ basis, respectively. Moreover, X could be applied as a potential sensor for the quantitative detection of In3+ and Zn2+ with a satisfactory recovery and relative standard deviation (RSD) in real water samples.

Graphical abstract: A selective “turn-on” sensor for recognizing In3+ and Zn2+ in respective systems based on imidazo[2,1-b]thiazole

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Article information


Submitted
08 Oct 2019
Accepted
13 Jan 2020
First published
13 Jan 2020

Photochem. Photobiol. Sci., 2020,19, 289-298
Article type
Paper

A selective “turn-on” sensor for recognizing In3+ and Zn2+ in respective systems based on imidazo[2,1-b]thiazole

Y. Xu, S. Zhao, Y. Zhang, H. Wang, X. Yang, M. Pei and G. Zhang, Photochem. Photobiol. Sci., 2020, 19, 289
DOI: 10.1039/C9PP00408D

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