Specific colorimetric detection of Fe3+ ions in aqueous solution by squaraine-based chemosensor. Issue 61 (11th October 2018)

• Record Type: Journal Article
• Authors: Liu, Xiaoqian; Li, Na; Xu, Min-Min; Wang, Jianhao; Jiang, Chunhui; Song, Guoqiang; Wang, Yong
• Is Part Of: RSC advances. Volume 8:Issue 61(2018)
• Page Start: 34860
• Page End: 34866
• Publication Date: 2018-10-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra07345g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A squaraine based chemosensor can be applied for instant colorimetric detection (blue to green) of Fe 3+ ions in aqueous solution. Abstract : A new squaraine based chemosensorTSQ was developed for colorimetric detection of Fe 3+ ions. A thymine moiety inTSQ was constructed to act as an ion acceptor. The sensor displayed an instant colorimetric response specific to Fe 3+ over the other metal ions in 20% AcOH–H2 O 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 betweenTSQ and Fe 3+ 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 Fe 3+ was strongly supported by DFT calculation. Finally, the sensor has proven to be suitable in real sample applications.