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Updated: Jul 6, 2026

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Published on: August 19, 2013
Chromone-based thiosemicarbazone and semicarbazone as efficient fluorescent sensors for CrO42-/ Cr2O72- Ion detection
Ritika Dudeja1, Shehneela Nisa1, Mohamad Yusuf1
1Department of Chemistry, Punjabi University, Patiala 147002, Punjab, India.
Abstract:
In this study chromone based Schiff's bases were rationally designed and evaluated for the selective detection of toxic chromate (CrO42-) and dichromate (Cr2O72-) ions. Both probes TSC and SC exhibited pronounced fluorescence quenching with low limits of detection. Job's plot analysis revealed a 1:1 binding stoichiometry for both TSC-CrO42-/Cr2O72- and SC-CrO42-/Cr2O72- complexes, while the binding constants were determined using modified Benesi Hildebrand plot. FT-IR and DFT study further confirmed the formation of stable ligand-anion complexes. Notably both the probes detected CrO42- and Cr2O72- ions in real water samples including tap, river and bottled water.
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