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Selective Colorimetric Sensor for the Detection of Hg 2+ and H 2 S in Aqueous Medium and Waste Water Samples
Author(s) -
Kaushik Rahul,
Singh Ajeet,
Ghosh Amrita,
Jose D. Amilan
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600229
Subject(s) - mercury (programming language) , bathochromic shift , detection limit , chemistry , aqueous solution , hydrogen sulfide , intramolecular force , analytical chemistry (journal) , inorganic chemistry , chromatography , sulfur , stereochemistry , organic chemistry , fluorescence , physics , quantum mechanics , computer science , programming language
Dabsyl based new colorimetric sensor 1 for the selective detection of environmentally most important cation Hg 2+ and biologically important hydrogen sulfide (H 2 S) in aqueous medium have been reported. The probe 1 selectively responded to Hg 2+ among various cations and shows colour change from yellow to red with the bathochromic shift in Uv‐Vis spectrum via intramolecular charge transfer (ICT) mechanism. The limit of detection for mercury was determined as 80 μM. The possibility of using 1 to detect mercury in industrial waste water samples was also explored with good recovery value. The ensemble 1.Hg 2+ , also applicable for the detection of H 2 S (LOD = 28 μM) in water among different bio‐thiols and anions. H 2 S displaces the mercury from 1.Hg 2+ via metal displacement approach and regenerates the original probe 1 within few seconds. Regenerated receptor 1 , further used for the detection of mercury ion. Receptor 1 incorporated test paper and polymer based thin films were used as a portable kit for the selective colorimetric detection of mercury and H 2 S in water.