New Materials, Compounds and Applications

ISSN Print: 2521-7194

ISSN Online: 2523-4773

New Materials, Compounds and Applications is an open access, strictly peer reviewed journal that is devoted to publication of the reviews and full-length papers recording original research results on, or techniques for, studying the relationship between structure, properties of materials and compounds and their applications. Materials include metals, ceramics, glasses, polymers, energy materials, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials.

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Spectrophotometric Determination of Trace Amount of Nickel (II) using a New (Azo) Derivative, Study of Thermodynamic Functions and their Analytical Application

Published: 04-08-2026

https://doi.org/10.62476/nmca102373

Abstract

The azo derivative ligand (BTDQ) and its nickel (II) complex was obtained by the classical azo coupling reaction and then accordingly from 2-aminobenzothiazole (ABT) and 8-hydroxyquinoline (8HQ) respectively. Characterizations of the compounds were carried out by H¹NMR, FT-IR, UV-Vis and GC mass spectra. This complex had a characteristic absorption (absorption λ_max= 589.5 nm) at (pH 5) and it was found to be stable over 24 h time for stability studies. The analytical application was developed based on the concentration of reagents, reaction time, masking agent, metal/ligand stoichiometry (1:2), ionic strength and thermodynamic functions (∆H, ∆G, ∆S). The limit of detection was 0.597 ppm with SD = 1.414 × 10^-3 and %RSD to be (0.322-1.089) %. Physical properties including solubility and molar conductivity were also studied. Spectral studies showed bathochromic shift in the UV-Vis absorption compared to the free ligand indicating a successful complex formation and increased electronic transition.