Abstract
In this work we report a selective colorimetric chemosensor (S) for Cu 2+ ion detection in aqueous media. It has been synthesized by a condensation reaction between 1-hydrazinophtalazine and 6,6 ′ -dihydroxy-5,5 ′ dimethoxy-(1,1 ′ -biphenyl)-3,3 ′ -dicarbaldehyde. The interaction between S and Cu 2+ was studied and the results showed a bathochromic shift at 420 nm in UV–Vis spectra. The absorbance enhancement of S was attributed to complex formation with Cu 2+ by 2:1 stoichiometry. The proposed analytical method can be applied to Cu 2+ quantification with a linear range covering from 5.0 to 315.8μM, and can be used to routinely analyze Cu 2+ in environmental aqueous samples with satisfactory results.
Highlights
In the past few decades, the rapid increase in industry has resulted in considerable rise in the standard of people’s living conditions
Heavy metals are a group of metals and metalloids that have relatively high density and are toxic even at low concentrations
Heavy metals tend to accumulate in organisms [2,3,4,5]
Summary
In the past few decades, the rapid increase in industry has resulted in considerable rise in the standard of people’s living conditions. Cupric ion (Cu2+) is the third most essential transition metal ion for biological processes in the human body It plays a vital role in electron transfer process of many biological reactions and in the development of many organs [7]. The determination of metals such as copper in aqueous matrices is done with expensive technologies requiring low detection levels and accurate analysis with high sensitivity. Sensitive and selective optical chemosensors have been developed as tools for analyte recognition [16] Their optical detection is usually performed via color modification or luminescence spectral changes. The naked eye detection of metal ion (color change) at very low concentrations using this method is attractive from a practical point of view. The ligand was obtained through a simple synthetic pathway incorporating 1-hydrazinophthalazine to 6,6 -dihydroxy dimethoxy-(1,1 -biphenyl)-3,3 -dicarbaldehyde
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