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A Unique Thiosemicarbazide‐Based Colorimetric Chemosensor for Fe 2+ in Pure Aqueous Solution with the Lowest Detection Limit
Author(s) -
So Haeri,
Lee Minji,
Kim Cheal
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002062
Subject(s) - detection limit , aqueous solution , chemistry , titration , spectroscopy , colorimetry , colorimetric analysis , analytical chemistry (journal) , nuclear chemistry , proton nmr , inorganic chemistry , chromatography , stereochemistry , physics , quantum mechanics
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.