Synthesis, characterization, and crystal structure of (E)-Nʹ-(4-Bromobenzylidene)-benzenesulfonohydrazide and its application as a sensor of chromium ion detection from environmental samples

Abstract

A novel (E)-Nʹ-(4-Bromobenzyledene)-benzenesulfonohydrazide compound was prepared by using an easy condensation procedure from 4-Bromobenzaldehyde and benzenesulphonylhydrazine in a good yield which was crystallized in EtOH. 4-BBBSH was characterized by various spectroscopic techniques for example 1H NMR, 13C NMR, FTIR, and UV–Vis. Structure of the 4-BBBSH molecule was established by using a single crystal X-ray diffraction method (SCXRDM). A selective sensor was modified by deposition of a thin-layer of 4-BBBSH onto a flat GCE with conducting polymer matrix such as Nafion as chemical binder. 4-BBBSH/GCE/Nf sensor was used for the selective detection of metal ion (MI), chromium (Cr3+) by using dependable current-voltage (I–V) technique. Analytical parameters such as sensitivity, LOD, and LOQ of the proposed sensor towards Cr3+ were calculated from the calibration graph as 1898.73 pAμM−1cm−2, ≈95.5 pM, and 318.33 mM respectively. This fabricated 4-BBBSH/GCE/Nf sensor applied to the selective determination of Cr3+ in environmental samples and found satisfactory results.