Sensitive ratiometric sensor for Al(III) detection in water samples using luminescence or eye-vision

Abstract

A facile, quick, and sensitive ratiometric luminescence sensor is designed for detection aluminum ions in water samples using luminescence or eye-vision. This approach relies on the emission change of the europium(III) complex with 3-(2-naphthoyl)-1,1,1,-trifluoro acetone (3-NTA) after interaction with various concentration of aluminum ions. The addition of aluminum ions suppressed the Eu(III) emission at 615 nm under 333 nm excitation, while simultaneously enhancing the ligand emission at 480 nm. Optimum detection was obtained in methanol. The quantification of aluminum ions using ratiometric method was determined by plotting the luminescence ratio (F480nm/F615nm) versus aluminum ions concentration. The calibration plot was obtained within the range 0.1–100 µM with LOD = 0.27 µM. Additionally, the concentration of aluminum ions can be estimated semi-quantitatively by visually observing the luminescence colour change of the probe from red to light green and then to dark green after being excited by a UV lamp with 365 nm. As far as we are aware, this is the first luminescent lanthanide complex-based ratiometric probe for the detection of aluminum ions. The probe showed remarkable aluminum ions selectivity relative to that of other metal ions. The suggested sensor was used effectively to identify aluminum ions in water samples with good results. Graphical Abstract

Furoic Acid-Capped LaF3:Tb Nanoparticles for Al3+ Detection Based on Aggregation-Induced Luminescence Enhancement

“…This is the first report on Al 3+ detection using lanthanide-doped luminescence nanoparticles. The LOD values along with the cited literature are summarized in Table S1. ,,− ,,− ,,− …”

“…55 In another report, Khairy proposed a ratiometric luminescent probe of Eu(III)-(3-NTA) 3 for the selective and sensitive detection of Al 3+ ions with a LOD of 0.27 μM. 56 However, the formation of metal−organic complex materials has several limitations and must be controlled in many respects, such as the combination of suitable metals, organic ligands, and their ratios, solvent medium, reaction temperature, pH, and reaction time. Structural parameters such as ligand shape, coordination sites, radii, flexibility, and steric hindrance directly affect the performance of the metal−organic complex, physical and optical properties, and sensing applications.…”

“…Chen and co-workers developed a binuclear Eu-based luminescent compound with a crown ether analogue, which is a highly sensitive luminescent probe for Al 3+ ion detection . In another report, Khairy proposed a ratiometric luminescent probe of Eu(III)-(3-NTA) 3 for the selective and sensitive detection of Al 3+ ions with a LOD of 0.27 μM . However, the formation of metal–organic complex materials has several limitations and must be controlled in many respects, such as the combination of suitable metals, organic ligands, and their ratios, solvent medium, reaction temperature, pH, and reaction time.…”

A simple ‘turn-on’ fluorescence chemosensor for Al(iii) detection in aqueous solution and solid matrix

“…1 Owing to its noteworthy effect on human health, research investigating reliable methods for the detection of Al( iii ) is gaining much attention. 2,3 Fluorometry for the detection of Al( iii ), which offers simplicity, sensitivity, selectivity, and real-time nondestructive detection, has attracted significant attention compared to traditional instrumental analytical methods, such as atomic absorption spectrometry and potentiometric titration. 4–9…”