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An efficient chemodosimeter for the detection of Hg() diselenide oxidation

Mercury ions are toxic and exhibit hazardous effects on the environment and biological systems, and thus demand for the selective and sensitive detection of mercury has become considerably an important issue. Here, we have developed a diselenide containing coumarin-based probe 3 for the selective de...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2022-02, Vol.51 (6), p.2269-2277
Main Authors: Deshmukh, Pratiksha P, Malankar, Gauri S, Sakunthala, Arunima, Navalkar, Ambuja, Maji, Samir K, Murale, Dhiraj P, Saravanan, Raju, Manjare, Sudesh T
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Summary:Mercury ions are toxic and exhibit hazardous effects on the environment and biological systems, and thus demand for the selective and sensitive detection of mercury has become considerably an important issue. Here, we have developed a diselenide containing coumarin-based probe 3 for the selective detection of Hg( ii ) with a "turn-on" response (a 48 fold increase in fluorescence intensity) at 438 nm. The probe could quantitatively detect Hg( ii ) with a detection limit of 1.32 μM in PBS solution. Moreover, the probe has operable efficiency over the physiological range with an increase in the quantum yield from 1.2% to 57.3%. The reaction of the probe with Hg( ii ) yielded a novel monoselenide based coumarin 4 via diselenide oxidation, which was confirmed by single crystal XRD. Furthermore, the biological use of the probe for the detection of Hg( ii ) was confirmed in the MCF-7 cell line. To the best of our knowledge, this is the first reaction-based probe for Hg( ii ) via diselenide oxidation. A coumarin based turn-on sensor for the selective detection of Hg( ii ) through oxidation of diselenide. The sensing mechanism supported with single crystal XRD of monoselenide. Sensitivity of the probe for the detection of Hg( ii ) confirmed with imaging in MCF-7 cells.
ISSN:1477-9226
1477-9234
DOI:10.1039/d1dt04038c