A Thallium Ion Sensor Development Based on the Synthesized (E)-N′-(Methoxybenzylidene)-4- Methylbenzenesulfonohydrazide Derivatives: Environmental Sample Analysis

Abstract

In this research work, three new derivatives of (E)-Nʹ-(methoxybenzylidene)-4-methylbenzenesulfonohydrazide (MBMBSH) were prepared by means of a condensation technique from the methoxybenzaldehyde and 4-methyl-benzenesulphonylhydrazine in good yields, which were crystallized in EtOH and MeOH. MBMBSH ligands were examined through spectroscopic progression (1H-NMR, 13C-NMR, FTIR, and UV-Visible). Structures of the MBMBSH lignads confirmed with a single crystal X-ray diffraction scheme (SCXRDS). MBMBSH derivatives used for the imminent recognition of heavy metal ion (thallium) based on a reliable current-voltage (I−V) procedure. Smooth GCE was covered with a light layer of MBMBSH molecules and consequently modified toward a sensitive and selective thallium ion sensor using conducting polymer matrix, Nafion (NF). Analytical parameters such as sensitivity, LOQ, and LOD of GCE/4-MBMBSH/NF as a sensor were calculated from the calibration plot and found as 622.9 pAμM−1cm−2, 250.0 mM, and 75.0 pM respectively. This prospective sensor (GCE/4-MBMBSH/NF) applied to the careful determination of thallium ion in spiked environmental samples and found satisfactory result.