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  • Title: Phenothiazine-Thiophene Hydrazide Dyad: An Efficient "On-Off" Chemosensor for Highly Selective and Sensitive Detection of Hg2+ Ions.
    Author: Govindasamy V, Perumal S, Sekar I, Madheswaran B, Karuppannan S, Kuppannan SB.
    Journal: J Fluoresc; 2021 May; 31(3):667-674. PubMed ID: 33560513.
    Abstract:
    A new phenothiazine-thiophene hydrazone based ((10-ethyl-10H-phenothiazine-3,7-diyl)bis(methanylylidene))bis(thiophene-2-carbohydrazide) (PHT) chemosensor was synthesized via a single-step reaction and utilized as fluorescence "On-Off" sensor towards Hg2+ ion. The PHT was fully characterized by FT-IR, 1H-NMR, and ESI-Mass spectral analysis. The PHT probe was efficiently used for the selective detection of Hg2+ ion in the presence of other metal ions. Further, the stoichiometry of the PHT with Hg2+ complex was confirmed by Job's plot analysis. The limit of detection (LOD) value of the probe PHT was found to be 0.44 × 10-8 M.
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