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<p>In this study, three novel organic Schiff base ligands (MB, DMB, and TMB) and their transition metal complexes (Ni<sup>2+</sup>, Cu<sup>2+</sup>, and Zn<sup>2+</sup>) were synthesized and systematically characterized to elucidate their structure-property relationships. The molecular structures and functional groups were confirmed via FTIR, <sup>1</sup>H NMR, and <sup>13</sup>C NMR spectroscopies. Electronic properties and metal-coordination behaviors were investigated using UV- <i>vis</i> absorption spectroscopy. Results revealed significant hypochromic shifts and prominent ligand-metal charge transfer bands, highlighting the impact of extended π-conjugation and methyl substitution. Furthermore, the electrochemical redox activities and electron transfer dynamics were evaluated through cyclic voltammetry. Unlike conventional synthetic methods, this study demonstrates an advanced degree of structural rearrangement through peripheral modifications, providing precise control over redox potentials and enhanced spectral stability. The complexes exhibit semi-infinite linear diffusion-controlled kinetics, confirmed by the Randles-Sevcik framework. Spectroscopic and electrochemical findings suggest that the specific metal-bonding configurations enable exceptional electronic regulation. Ultimately, the high charge-diffusion coefficients and stable interfacial redox kinetics establish a solid physicochemical baseline for these coordination architectures, positioning them as viable baseline templates for future electrocatalytic and target analyte detection platforms.</p>

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Materials synthesis, characterization, and electrochemical overpotential evaluation of new schiff base transition metal complexes as potential electrocatalysts

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Furkan Ali Nar,
  • Mustafa Bal,
  • Eyüp Akgün,
  • Mehmet Tümer

摘要

In this study, three novel organic Schiff base ligands (MB, DMB, and TMB) and their transition metal complexes (Ni2+, Cu2+, and Zn2+) were synthesized and systematically characterized to elucidate their structure-property relationships. The molecular structures and functional groups were confirmed via FTIR, 1H NMR, and 13C NMR spectroscopies. Electronic properties and metal-coordination behaviors were investigated using UV- vis absorption spectroscopy. Results revealed significant hypochromic shifts and prominent ligand-metal charge transfer bands, highlighting the impact of extended π-conjugation and methyl substitution. Furthermore, the electrochemical redox activities and electron transfer dynamics were evaluated through cyclic voltammetry. Unlike conventional synthetic methods, this study demonstrates an advanced degree of structural rearrangement through peripheral modifications, providing precise control over redox potentials and enhanced spectral stability. The complexes exhibit semi-infinite linear diffusion-controlled kinetics, confirmed by the Randles-Sevcik framework. Spectroscopic and electrochemical findings suggest that the specific metal-bonding configurations enable exceptional electronic regulation. Ultimately, the high charge-diffusion coefficients and stable interfacial redox kinetics establish a solid physicochemical baseline for these coordination architectures, positioning them as viable baseline templates for future electrocatalytic and target analyte detection platforms.