Method for highly selective, ultrasensitive fluorimetric detection of Cu2+ and Al3+ by Schiff bases containing o-phenylenediamine and o-aminophenol
Copyright © 2023 Elsevier Inc. All rights reserved..
Schiff base probes (1 and 2) made from o-phenylenediamine and o-aminophenol were appeared as highly selective fluorimetric chemosensor of Cu2+ and Al3+ ions respectively. Strong fluorescence emission of probe 1 at 415 nm (excitation at 350 nm) was instantly turned off on addition of Cu2+. Very weak fluorescence of probe 2 at 506 nm (excitation at 400 nm) was immediately turned on specifically by Al3+. Job's plot and ESI-MS results suggested 1:1 molar stoichiometric ratio of metal ion and probe in their respective complexes. Probe 1 and 2 had demonstrated very low detection limit (9.9 and 2.5 nM respectively). Binding of Cu2+ with probe 1 was found chemically reversible on addition of EDTA, while complexation between Al3+ and probe 2 was not reversible. On the basis of density functional theory (DFT) and spectroscopic results, probable mode of sensing of the metal ions by the probes were proposed. Quenching of the fluorescence of probe 1 by Cu2+ was attributed to the extensive transfer of charge from the probe molecule to paramagnetic copper ion. Whereas, in the Al3+-complex of probe 2, photo-induced electron transfer (PET) process from the imine nitrogen to salicylaldehyde moiety was restricted and thereby the weak emission intensity of probe 2 was enhanced significantly. Effective pH range of sensing the metal ions by probe 1 and 2 were 4 to 8 and 6 to 10 respectively. Probe 1 was also applied in the design of a logic gate for Cu2+ detection. Moreover, probe 1 and 2 was also used in water sample analysis for quantitative estimation of Cu2+ and Al3+ respectively.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:217 |
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| Enthalten in: |
Methods (San Diego, Calif.) - 217(2023) vom: 15. Sept., Seite 27-35 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Sharma, Shivani [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 31.07.2023 Date Revised 01.08.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.ymeth.2023.06.013 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM359010482 |
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| 100 | 1 | |a Sharma, Shivani |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Method for highly selective, ultrasensitive fluorimetric detection of Cu2+ and Al3+ by Schiff bases containing o-phenylenediamine and o-aminophenol |
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| 500 | |a Date Revised 01.08.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023 Elsevier Inc. All rights reserved. | ||
| 520 | |a Schiff base probes (1 and 2) made from o-phenylenediamine and o-aminophenol were appeared as highly selective fluorimetric chemosensor of Cu2+ and Al3+ ions respectively. Strong fluorescence emission of probe 1 at 415 nm (excitation at 350 nm) was instantly turned off on addition of Cu2+. Very weak fluorescence of probe 2 at 506 nm (excitation at 400 nm) was immediately turned on specifically by Al3+. Job's plot and ESI-MS results suggested 1:1 molar stoichiometric ratio of metal ion and probe in their respective complexes. Probe 1 and 2 had demonstrated very low detection limit (9.9 and 2.5 nM respectively). Binding of Cu2+ with probe 1 was found chemically reversible on addition of EDTA, while complexation between Al3+ and probe 2 was not reversible. On the basis of density functional theory (DFT) and spectroscopic results, probable mode of sensing of the metal ions by the probes were proposed. Quenching of the fluorescence of probe 1 by Cu2+ was attributed to the extensive transfer of charge from the probe molecule to paramagnetic copper ion. Whereas, in the Al3+-complex of probe 2, photo-induced electron transfer (PET) process from the imine nitrogen to salicylaldehyde moiety was restricted and thereby the weak emission intensity of probe 2 was enhanced significantly. Effective pH range of sensing the metal ions by probe 1 and 2 were 4 to 8 and 6 to 10 respectively. Probe 1 was also applied in the design of a logic gate for Cu2+ detection. Moreover, probe 1 and 2 was also used in water sample analysis for quantitative estimation of Cu2+ and Al3+ respectively | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Fluorescence chemosensing of Cu(2+) and Al(3+) | |
| 650 | 4 | |a Ligand to metal charge transfer | |
| 650 | 4 | |a Photo-induced electron transfer | |
| 650 | 4 | |a o-aminophenol Schiff base | |
| 650 | 4 | |a o-phenylenediamine Schiff base | |
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| 650 | 7 | |a Schiff Bases |2 NLM | |
| 650 | 7 | |a Metals |2 NLM | |
| 650 | 7 | |a Ions |2 NLM | |
| 650 | 7 | |a Fluorescent Dyes |2 NLM | |
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| 700 | 1 | |a Debnath, Joy |e verfasserin |4 aut | |
| 700 | 1 | |a Sundar Ghosh, Kalyan |e verfasserin |4 aut | |
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