Three in one sensor: a fluorometric, colorimetric and paper based probe for the selective detection of mercury()

In this work, a 3,4-ethylenedioxythiophene and tetrahydrophenazine based donor-acceptor-donor-type conjugated molecule was used for the first time as a turn-off fluorescence sensor for the detection of mercury (Hg 2+ ) ions. Eleven metal ions (As 3+ , Cd 2+ , Cu 2+ , Fe 2+ , Fe 3+ , Hg + , Hg 2+ , K...

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Veröffentlicht in:New journal of chemistry 2021-03, Vol.45 (9), p.422-429
1. Verfasser: Ergun, Emine Gul Cansu
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description In this work, a 3,4-ethylenedioxythiophene and tetrahydrophenazine based donor-acceptor-donor-type conjugated molecule was used for the first time as a turn-off fluorescence sensor for the detection of mercury (Hg 2+ ) ions. Eleven metal ions (As 3+ , Cd 2+ , Cu 2+ , Fe 2+ , Fe 3+ , Hg + , Hg 2+ , K + , Ni 2+ , Se 4+ and Zn 2+ ) were tested and the proposed sensor exhibited almost 100% quenching in the fluorescence emission only when interacting with Hg 2+ ions. Moreover, the sensor changed its color from yellow to blue upon Hg 2+ addition, which indicates that the sensor is not only a fluorescence sensor but also a chromogenic sensor for Hg 2+ detection. The solid state behavior was tested by preparing a simple paper-based sensor, and complete fluorescence quenching in the presence of Hg 2+ was successfully obtained. The stoichiometry between the sensor and Hg 2+ was found to be 1 : 1. The limit of detection (LOD) and the practical quantitation limit (PQL) were calculated to be 8.0 ppm and 26.3 ppm, respectively. The sensor was found to be more sensitive under acidic conditions, and the LOD decreased up to 3.0 ppm in the pH range of 1.6-2.3. A new fluorometric, colorimetric and paper-based probe for the selective detection of mercury( ii ) with a detection limit of 8.0 ppm.
doi_str_mv 10.1039/d1nj00085c
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source Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection
subjects Arsenic ions
Colorimetry
Fluorescence
Mercury (metal)
Mercury compounds
Nickel
Quenching
Sensors
Stoichiometry
title Three in one sensor: a fluorometric, colorimetric and paper based probe for the selective detection of mercury()
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