A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution
The development of chemosensors able to detect analytes in a variety of sample matrices through a low-cost, fast, and direct approach is of current interest in food, health, industrial, and environmental fields. This contribution presents a simple approach for the selective and sensitive detection o...
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MDPI AG
2023-04-01
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Online Access: | https://www.mdpi.com/1424-8220/23/8/3925 |
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author | Ivan Pietro Oliveri Agostino Attinà Santo Di Bella |
author_facet | Ivan Pietro Oliveri Agostino Attinà Santo Di Bella |
author_sort | Ivan Pietro Oliveri |
collection | DOAJ |
description | The development of chemosensors able to detect analytes in a variety of sample matrices through a low-cost, fast, and direct approach is of current interest in food, health, industrial, and environmental fields. This contribution presents a simple approach for the selective and sensitive detection of Cu<sup>2+</sup> ions in aqueous solution based on a transmetalation process of a fluorescent substituted Zn(salmal) complex. Transmetalation is accompanied by relevant optical absorption changes and quenching of the fluorescence emission, leading to high selectivity and sensitivity of the chemosensor, with the advantage of not requiring any sample pretreatment or pH adjustment. Competitive experiments demonstrate a high selectivity of the chemosensor towards Cu<sup>2+</sup> with respect to the most common metal cations as potential interferents. A limit of detection down to 0.20 μM and a dynamic linear range up to 40 μM are achieved from fluorometric data. By exploiting the fluorescence quenching upon formation of the copper(II) complex, simple paper-based sensor strips, visible to naked eyes under UV light, are used for the rapid, qualitative, and quantitative in situ detection of Cu<sup>2+</sup> ions in aqueous solution over a wide concentration range, up to 10.0 mM, in specific environments, such as in industrial wastewater, where higher concentrations of Cu<sup>2+</sup> ions can occur. |
first_indexed | 2024-03-11T04:33:27Z |
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institution | Directory Open Access Journal |
issn | 1424-8220 |
language | English |
last_indexed | 2024-03-11T04:33:27Z |
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spelling | doaj.art-d8269b4761b94cb2b6df9acd86ecfbdd2023-11-17T21:16:35ZengMDPI AGSensors1424-82202023-04-01238392510.3390/s23083925A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous SolutionIvan Pietro Oliveri0Agostino Attinà1Santo Di Bella2Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, ItalyDipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, ItalyDipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, ItalyThe development of chemosensors able to detect analytes in a variety of sample matrices through a low-cost, fast, and direct approach is of current interest in food, health, industrial, and environmental fields. This contribution presents a simple approach for the selective and sensitive detection of Cu<sup>2+</sup> ions in aqueous solution based on a transmetalation process of a fluorescent substituted Zn(salmal) complex. Transmetalation is accompanied by relevant optical absorption changes and quenching of the fluorescence emission, leading to high selectivity and sensitivity of the chemosensor, with the advantage of not requiring any sample pretreatment or pH adjustment. Competitive experiments demonstrate a high selectivity of the chemosensor towards Cu<sup>2+</sup> with respect to the most common metal cations as potential interferents. A limit of detection down to 0.20 μM and a dynamic linear range up to 40 μM are achieved from fluorometric data. By exploiting the fluorescence quenching upon formation of the copper(II) complex, simple paper-based sensor strips, visible to naked eyes under UV light, are used for the rapid, qualitative, and quantitative in situ detection of Cu<sup>2+</sup> ions in aqueous solution over a wide concentration range, up to 10.0 mM, in specific environments, such as in industrial wastewater, where higher concentrations of Cu<sup>2+</sup> ions can occur.https://www.mdpi.com/1424-8220/23/8/3925Zn(salen-type) complexesfluorescent chemosensorpaper-based sensor stripstransmetalationCu<sup>2+</sup> detection |
spellingShingle | Ivan Pietro Oliveri Agostino Attinà Santo Di Bella A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution Sensors Zn(salen-type) complexes fluorescent chemosensor paper-based sensor strips transmetalation Cu<sup>2+</sup> detection |
title | A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution |
title_full | A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution |
title_fullStr | A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution |
title_full_unstemmed | A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution |
title_short | A Zinc(II) Schiff Base Complex as Fluorescent Chemosensor for the Selective and Sensitive Detection of Copper(II) in Aqueous Solution |
title_sort | zinc ii schiff base complex as fluorescent chemosensor for the selective and sensitive detection of copper ii in aqueous solution |
topic | Zn(salen-type) complexes fluorescent chemosensor paper-based sensor strips transmetalation Cu<sup>2+</sup> detection |
url | https://www.mdpi.com/1424-8220/23/8/3925 |
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