Optical detection of Al(III) and Cu(II) ions in an aqueous medium by using a simple probe possessing O,O-donor moiety
| Autor: | Kuppanagounder P. Elango, P. Saravana Kumar, R. Shanmugapriya, K. Poongodi, C. Nandhini |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Phosphorus, Sulfur, and Silicon and the Related Elements. 196:780-790 |
| ISSN: | 1563-5325 1042-6507 |
| DOI: | 10.1080/10426507.2021.1920940 |
| Popis: | A commercially available probe (RS) has been reported for instantaneous selective colorimetric detection of Cu(II) and fluorescent detection of Al(III) ions in H2O:DMSO (90:10% v/v) medium. The probe displays a color change from pale yellow (λab 352 nm) to yellowish-green (λab 411 nm) with Cu(II) and a change in emission from green (λex 340 nm; λem 522 nm) to bluish-green (λem 489 nm) with Al(III) ions. The optical detection of these metal ions by RS is via the formation of tetragonally distorted octahedral RS-Cu(II) and tetrahedral RS-Al(III) complexes as evidenced from the results of UV-Vis, 27Al & 1H NMR, HRMS, EPR and thermal analysis studies. Job’s method indicates that the stoichiometry of both these complexes is 1:1. The probe's corresponding optical changes are particular for Cu(II) and Al(III) ions in the presence of other metal ions. RS displays high selectivity to these ions in a wide pH range. The limits of the detection of Cu(II) and Al(III) are as low as 66 nM and 0.83 µM, respectively. Further, RS could be applied as a fluorescent probe for observing Al(III) ions in living HeLa cells by carrying out cell image studies. |
| Databáze: | OpenAIRE |
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