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

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.

SUBMITTER: Liu X

PROVIDER: S-EPMC9087219 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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

Liu Xiaoqian X Li Na N Xu Min-Min MM Wang Jianhao J Jiang Chunhui C Song Guoqiang G Wang Yong Y

RSC advances 20181011 61

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 ev ...[more]

PMID: 35547042

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