Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media
Hg and Cd are the two most toxic heavy metal ions that could be found in aqueous solutions. In this study, a chemosensor based on 5-(4-((4-nitrophenyl) diazenyl) phenyl)-1,3,4-oxadiazole-2-thiol (DOT) was reported to detect these ions simultaneously. DOT showed high selectivity towards Hg ion by cha...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023088825 |
| _version_ | 1827615953998839808 |
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| author | Behzad Pourbadiei Bagher Eftekhari-Sis Azadeh Kordzadeh Ali Pourjavadi |
| author_facet | Behzad Pourbadiei Bagher Eftekhari-Sis Azadeh Kordzadeh Ali Pourjavadi |
| author_sort | Behzad Pourbadiei |
| collection | DOAJ |
| description | Hg and Cd are the two most toxic heavy metal ions that could be found in aqueous solutions. In this study, a chemosensor based on 5-(4-((4-nitrophenyl) diazenyl) phenyl)-1,3,4-oxadiazole-2-thiol (DOT) was reported to detect these ions simultaneously. DOT showed high selectivity towards Hg ion by changing the color of the solution from beige to gold-yellow at different concentrations of Hg ion. In comparison, other relevant metals, such as Li+, Na+, K+, Cs+, Mg2+, Ca2+, Al3+, Fe2+, Ag+, Cu2+, Pb2+, Ni2+, Zn2+, Cr3+, Fe3+, Pb4+, Mn2+, and Cd2+ did not affect the color of the DOT solution as the interfering ions. Despite no changes in the color of DOT solution in the presence of Cd ion, a solution containing DOT-Hg complex was changed from gold-yellow to orange by adding Cd ion, providing an approach for detecting Hg and Cd ion simultaneously with UV–Vis and Fluorescent spectroscopy. DOT exhibited a high association constant with a detection limit of 0.05 μM for Hg and Cd ions in an aqueous solution. The results of quantum mechanics (QM) calculations were also consistent with the experimental observations, which indicated that changes in the band gap could explain the various colors of DOT complex with metal ions. |
| first_indexed | 2024-03-09T09:18:58Z |
| format | Article |
| id | doaj.art-933c02b8864845cebc4e8cafab011eec |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-09T09:18:58Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-933c02b8864845cebc4e8cafab011eec2023-12-02T07:03:45ZengElsevierHeliyon2405-84402023-11-01911e21674Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous mediaBehzad Pourbadiei0Bagher Eftekhari-Sis1Azadeh Kordzadeh2Ali Pourjavadi3Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, IranDepartment of Chemistry, University of Maragheh, Maragheh, 55181-83111, IranDepartment of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, 11365-9516, IranDepartment of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran; Corresponding author.Hg and Cd are the two most toxic heavy metal ions that could be found in aqueous solutions. In this study, a chemosensor based on 5-(4-((4-nitrophenyl) diazenyl) phenyl)-1,3,4-oxadiazole-2-thiol (DOT) was reported to detect these ions simultaneously. DOT showed high selectivity towards Hg ion by changing the color of the solution from beige to gold-yellow at different concentrations of Hg ion. In comparison, other relevant metals, such as Li+, Na+, K+, Cs+, Mg2+, Ca2+, Al3+, Fe2+, Ag+, Cu2+, Pb2+, Ni2+, Zn2+, Cr3+, Fe3+, Pb4+, Mn2+, and Cd2+ did not affect the color of the DOT solution as the interfering ions. Despite no changes in the color of DOT solution in the presence of Cd ion, a solution containing DOT-Hg complex was changed from gold-yellow to orange by adding Cd ion, providing an approach for detecting Hg and Cd ion simultaneously with UV–Vis and Fluorescent spectroscopy. DOT exhibited a high association constant with a detection limit of 0.05 μM for Hg and Cd ions in an aqueous solution. The results of quantum mechanics (QM) calculations were also consistent with the experimental observations, which indicated that changes in the band gap could explain the various colors of DOT complex with metal ions.http://www.sciencedirect.com/science/article/pii/S2405844023088825ChemosensorMercury detectionpH indicatorHeavy metal ions |
| spellingShingle | Behzad Pourbadiei Bagher Eftekhari-Sis Azadeh Kordzadeh Ali Pourjavadi Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media Heliyon Chemosensor Mercury detection pH indicator Heavy metal ions |
| title | Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media |
| title_full | Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media |
| title_fullStr | Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media |
| title_full_unstemmed | Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media |
| title_short | Simultaneous detection of mercury and cadmium ions: A colorimetric method in aqueous media |
| title_sort | simultaneous detection of mercury and cadmium ions a colorimetric method in aqueous media |
| topic | Chemosensor Mercury detection pH indicator Heavy metal ions |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023088825 |
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