Optical detection of Al(III) and Cu(II) ions in an aqueous medium by using a simple probe possessing O, O-donor moiety. (30th August 2021)

• Record Type: Journal Article
• Authors: Shanmugapriya, R.; Saravana Kumar, P.; Poongodi, K.; Nandhini, C.; Elango, Kuppanagounder P.
• Is Part Of: Phosphorus, sulfur, and silicon and the related elements. Volume 196:Number 8(2021)
• Page Start: 780
• Page End: 790
• Publication Date: 2021-08-30
• Subjects: Copper sensor -- aluminum sensor -- fluorescence -- colorimetric -- complex formation; Sulfur compounds -- Periodicals; Organosulfur compounds -- Periodicals; Phosphorus compounds -- Periodicals; Organophosphorus compounds -- Periodicals; Silicon compounds -- Periodicals; Organosilicon compounds -- Periodicals; 546
• DOI: 10.1080/10426507.2021.1920940
• Languages: English
• ISSNs: 1042-6507

Abstract

Abstract: A commercially available probe (RS ) has been reported for instantaneous selective colorimetric detection of Cu(II) and fluorescent detection of Al(III) ions in H2 O: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, 27 Al & 1 H 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. Graphical Abstract: UF0001