Comptes Rendus. Chimie (Nov 2021)

A selective colorimetric chemosensor for detection of Cu(II) ions in aqueous samples

  • Ferretti, Cristián Alejandro,
  • Gutierrez, Leandro Gabriel,
  • Guntero, Vanina Alejandra,
  • Noriega, Pablo Javier,
  • Kneeteman, María Nelida

DOI
https://doi.org/10.5802/crchim.131
Journal volume & issue
Vol. 24, no. 3
pp. 385 – 396

Abstract

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In this work we report a selective colorimetric chemosensor (S) for $\mathrm{Cu}^{2+}$ ion detection in aqueous media. It has been synthesized by a condensation reaction between 1-hydrazinophtalazine and 6,$6^{\prime}$-dihydroxy-5,$5^{\prime}$dimethoxy-(1,$1^{\prime}$-biphenyl)-3,$3^{\prime}$-dicarbaldehyde. The interaction between S and $\mathrm{Cu}^{2+}$ 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 $\mathrm{Cu}^{2+}$ by 2:1 stoichiometry. The proposed analytical method can be applied to $\mathrm{Cu}^{2+}$ quantification with a linear range covering from 5.0 to $315.8~{\mu }$M, and can be used to routinely analyze $\mathrm{Cu}^{2+}$ in environmental aqueous samples with satisfactory results.

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