A Unique Thiosemicarbazide‐Based Colorimetric Chemosensor for Fe2+ in Pure Aqueous Solution with the Lowest Detection Limit. Issue 34 (10th September 2020)

• Record Type: Journal Article
• Authors: So, Haeri; Lee, Minji; Kim, Cheal
• Is Part Of: ChemistrySelect. Volume 5:Issue 34(2020)
• Page Start: 10521
• Page End: 10525
• Publication Date: 2020-09-10
• Subjects: colorimetric chemosensor -- Fe2+ -- paper strips -- thiosemicarbazide -- water samples; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202002062
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: A unique colorimetric chemosensor Hy‐bp based on thiosemicarbazide was prepared. Hy‐bp showed an obvious red‐shifted spectrum and unique color change from colorless to deep green only for Fe 2+ . Detection limit for Fe 2+ was 0.34 μM, which is the lowest among those of colorimetric chemosensors previously reported for Fe 2+ in pure aqueous solution. Hy‐bp can be utilized in paper strips and water samples as a colorimetric sensor for detecting Fe 2+ . The sensing mechanism of Hy‐bp for Fe 2+ was demonstrated by UV‐vis spectroscopy, Job plot, FT‐IR and 1 H NMR titrations. Abstract : Thiosemicarbazide‐based colorimetric chemosensor Hy‐bp was developed. Hy‐bp has a detection ability toward Fe 2+, showing UV‐visible red‐shift and color change to deep green in aqueous solution. The binding ratio between Hy‐bp and Fe 2+ was 1 to 1 and the detection limit was calculated to be 0.34 μM. Hy‐bp has the potential applicability for Fe 2+ in both paper strips and water samples. Based on the various spectroscopic techniques, FT‐IR and 1 H NMR titration, the sensing mechanism of Fe 2+ by Hy‐bp was proposed.