In this paper, two luminescent Zn(II) complexes with the formula [ZnH₂L^1,2] were newly synthesized by a one-step reaction of the bis-azo-Schiff base ligands and metal salt. Their mononuclear structure was characterized by different analytical and spectroscopic measurements (elemental analysis, IR, NMR, UV–vis, mass, powder XRD, conductance and magnetic susceptibility). TGA and DTA techniques showed that the complexes were stable above 400 °C. The host-guest interaction between the ligands and Zn(II) ion was examined by UV–vis titration. It found a low LOD value for Zn(II) ion in the concentration range of 1.30 × 10⁻⁶ M and 4.40 × 10^-7 M. The stoichiometric ratio and formation constant of ligand-Zn(II) complexation were determined using Benesi–Hildebrand and Job’s plots. Upon photoexcitation with Xenon lamp, Zn(II) complexes emitted green luminescence in DMSO solution. The antioxidant activity of the ligands and new Zn(II) complexes was studied by using DPPH radical scavenging assay by fixed reaction time and steady state measurements. The results indicated that the ligands exhibited higher scavenging activity than that of ascorbic acid, but Zn(II) complexes did not have any activity.

本文通过双偶氮基席夫碱配体与金属盐的一步反应，新合成了两种发光式为[ZnH ₂ L ^1,2 ]的Zn（II）配合物。它们的单核结构通过不同的分析和光谱测量（元素分析，IR，NMR，UV-vis，质量，粉末XRD，电导和磁化率）来表征。TGA和DTA技术表明，该络合物在400°C以上稳定。通过UV-vis滴定法检查了配体与Zn（II）离子之间的主客体相互作用。发现在1.30×10 ^-6 M和4.40×10 ^-7的浓度范围内，Zn（II）离子的LOD值较低。M.使用Benesi–Hildebrand和Job's图确定配体-Zn（II）络合的化学计量比和形成常数。氙气灯激发后，Zn（II）络合物在DMSO溶液中发出绿色发光。通过固定反应时间和稳态测量，通过DPPH自由基清除法研究了配体和新的Zn（II）配合物的抗氧化活性。结果表明，配体表现出比抗坏血酸更高的清除活性，但Zn（II）配合物没有任何活性。