Selective and sensitive optical chemosensor for detection of Ag(I) ions based on 2(4-hydroxy pent-3-en-2-ylideneamine) phenol in aqueous samples

A selective and sensitive chemosensor, based on the 2(4-hydroxy pent-3-en-2-ylideneamine) phenol (HPYAP) as chromophore, has been developed for colorimetric and visual detection of Ag(I) ions. HPYAP shows a considerable chromogenic behavior toward Ag(I) ions by changing the color of the solution from pale-yellow to very chromatic-yellow, which can be easily detected with the naked-eye. The chemosensor exhibited selective absorbance enhancement to Ag(I) ions in water samples over other metal ions at 438 nm, with a linear range of 0.4–500 μM (r2 = 0.999) and a limit of detection 0.07 μM of Ag(I) ions with UV–vis spectrophotometer detection. The relative standard deviation (RSD) for 100 μM Ag(I) ions was 2.05% (n = 7). The proposed method was applied for the determination Ag(I) ions in water and waste water samples.

HPYAP shows a considerable chromogenic behavior toward Ag(I) ions by changing the color of the solution from pale-yellow to very chromatic-yellow (438 nm), which can be easily detected with the naked-eye.Figure optionsDownload as PowerPoint slideHighlights
► In this work, a selective and sensitive colorimetric chemosensor for the quantification of Ag(I) ions in aqueous solution was investigated with a linear range of 0.2–2000 μM (r2 = 0.999) and a limit of detection 0.07 μM and 1 μM of Ag(I) ions with UV–vis spectrophotometer and visual detection, respectively.
► Currently working toward the few optical chemosensors reported for Ag(I) ions advantages such as, lower detection limit, simplicity, wide linear range, high sensitivity in neutral solution and high selectivity.