A novel colorimetric chemosensor based on 2-[(carbamothioylhydrazono) methyl]phenyl 4-methylbenzenesulfonate (CHMPMBS) for the detection of Cu(II) in aqueous medium

• Published in: Research on chemical intermediates Vol. 49; no. 5; pp. 2257 - 2276
• Main Authors: Hrichi, Hajer, Elkanzi, Nadia A. A., Ali, Ali M., Abdou, Aly
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-05-2023; Springer Nature B.V
• Subjects: Aluminum; Aqueous solutions; Catalysis; Chemical sensors; Chemical synthesis; Chemistry; Chemistry and Materials Science; Chemoreceptors; Colorimetry; Copper; Infrared spectroscopy; Inorganic Chemistry; Iron; Magnesium; Manganese; Nickel; NMR; Nuclear magnetic resonance; Physical Chemistry; Silver; Stoichiometry; Water sampling; Zinc; Chemosensor; Synthesis; DFT; Cu(II); Colorimetric
• ISSN: 0922-6168; 1568-5675
• DOI: 10.1007/s11164-022-04905-4

In this study, 2-[(carbamothioylhydrazono)methyl-phenyl-4-methylbenzenesulfonate
(CHMPMBS)
, which exhibits selective colorimetric chemosensor properties for Cu(II) ions, was synthesized and characterized by NMR and FT-IR spectroscopy. The
CHMPMBS
chemosensor demonstrated high sensitivity and selectivity toward Cu(II) in an aqueous media in the presence of many other competing cations (Na(I), Mg(II), Al(III), K(I), Ca(II), Cr(III), Mn(II), Fe(III), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Sr(II), Ag(I), Cd(II), Ba(II), and Pb(II). By forming a complex of 1: 1 stoichiometry (Cu:
CHMPMBS
) with Cu(II), the developed chemosensor gave a distinctive color change from pale yellow to pale green.
CHMPMBS
exhibits a rapid and accurate colorimetric assay for naked-eye detection of Cu(II) ions with a detection limit of 8.12 µM. Furthermore, the potential application of
CHMPMBS
has been extended to detect Cu(II) ions with functional recovery in both natural and simulated water samples. Furthermore, the Cu(II)-
CHMPMBS
complex was synthesized and characterized. The thermodynamic (Δ
G
, Δ
H
, and Δ
S
) and kinetic (
E
a
) parameters were investigated at four temperatures. Further, the binding constant of
CHMPMBS
, which binds to Cu(II) ions according to 1:1 stoichiometry, was determined to be 2.47 × 10
4
 M
−1
.
Graphical Abstract