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  • Title: Turn-off detection of Cr(III) with chelation enhanced fluorescence quenching effect by a naphthyl hydrazone Shiff base chemosensor.
    Author: Musikavanhu B, Zhang Y, Zhu D, Xue Z, Yuan R, Wang S, Zhao L.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2022 Nov 15; 281():121599. PubMed ID: 35816866.
    Abstract:
    A thiophene substituted naphthyl hydrazone derivative NHT was synthesized using a one-step route for the detection of trivalent chromium (Cr3+). UV-visible absorption and emission spectra, density functional theory calculations as well as 1H NMR titration confirmed that the probe underwent a turn-off response via the chelation enhanced fluorescence quenching effect upon exposure to Cr3+ and the NHT-Cr3+ complex was formed at a 1:1 binding stoichiometry. NHT exhibited a fast response rate of 2.3 min in buffer solution and a relatively low limit of detection of 41 nM. In addition, the Schiff base chemosensor exhibited excellent selectivity with high affinity towards Cr3+ in the presence of other competing cations. Bioimaging of the probe in PC3 cells further demonstrated the potential real life application of the probe in detecting Cr3+.
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