Issue 61, 2018, Issue in Progress
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RSC Advances

Specific colorimetric detection of Fe3+ ions in aqueous solution by squaraine-based chemosensor†

Xiaoqian Liu, ORCID logo *a   Na Li,a   Min-Min Xu,b   Jianhao Wang,a   Chunhui Jiang,c   Guoqiang Song*a  and  Yong Wang ORCID logo *b  

* Corresponding authors

a School of Pharmaceutical Engineering and Life Science, Changzhou University, Jiangsu, China
E-mail: chmliux@cczu.edu.sg, sgq@cczu.edu.cn

b College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
E-mail: yowang@suda.edu.cn

c School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, 2 Mengxi Road, Zhenjiang, Jiangsu, China

Abstract

A new squaraine based chemosensor TSQ was developed for colorimetric detection of Fe3+ ions. A thymine moiety in TSQ was constructed to act as an ion acceptor. The sensor displayed an instant colorimetric response specific to Fe3+ over the other metal ions in 20% AcOH–H2O solution. The limit of detection was much lower than that of the environmental protection agency guideline (5.37 μM) in drinking water. A 1 : 1 binding between TSQ and Fe3+ ion was evidenced by Job's plot measurement, ESI-MS and Fourier transform infrared (IR) measurements. Moreover, the proposed sensing mechanism of the receptor towards Fe3+ was strongly supported by DFT calculation. Finally, the sensor has proven to be suitable in real sample applications.

Graphical abstract: Specific colorimetric detection of Fe3+ ions in aqueous solution by squaraine-based chemosensor

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Article information

DOI
https://doi.org/10.1039/C8RA07345G
Article type
Paper
Submitted
03 Sep 2018
Accepted
02 Oct 2018
First published
11 Oct 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 34860-34866

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Specific colorimetric detection of Fe3+ ions in aqueous solution by squaraine-based chemosensor

X. Liu, N. Li, M. Xu, J. Wang, C. Jiang, G. Song and Y. Wang, RSC Adv., 2018, 8, 34860 DOI: 10.1039/C8RA07345G

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