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  • Title: A dual target chemosensor for the fluorometric detection of In3+ and colorimetric detection of Fe3.
    Author: Lee SY, Yang M, Kim C.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2018 Dec 05; 205():622-629. PubMed ID: 30077953.
    Abstract:
    A new dual target chemosensor 1, 1,1'‑((1E,1'E)‑((thiobis(ethane‑2,1‑diyl))bis(azanylylidene))bis(methanylylidene))bis(naphthalen‑2‑ol), was prepared by the reaction of a hydroxy-naphthaldehyde and a thiobis(ethylamine). Sensor 1 detected In3+ with turn-on fluorescence and Fe3+ via the change of color from colorless to pale violet. The sensing behaviors of 1 toward In3+ and Fe3+ were studied through photophysical experiments, ESI-mass, NMR titration, and theoretical calculations. In particular, 1 can discriminate In3+ from Al3+ and Fe3+ from Fe2+. Limits of detection for the analysis of In3+ and Fe3+ ions turned out to be 5.89 μM and 0.30 μM, respectively. In addition, sensor 1 functioned practically as a naked-eye test strip for Fe3+ and could be recycled by using EDTA for In3+ and DFO for Fe3+.
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