Research Information System
MAIN GROUP CHEMISTRY, vol.26, pp.3-21, 2026 (SCI-Expanded, Scopus)
In this study, a novel NO-type Schiff base ligand (LH) was synthesized
via the condensation reaction of
4-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)aniline and 2-hydroxy-1-naphthaldehyde,
followed by the preparation of its corresponding Ni(II) complex. The structures
of the ligand and its metal complex were comprehensively characterized by
elemental analysis, ¹H NMR, FT-IR, UV–Vis spectroscopy, cyclic voltammetry
(CV), thermal analysis (TGA/DTA), scanning electron microscopy (SEM), and
magnetic measurements. Spectroscopic and magnetic results indicate that the
Ni(II) complex adopts a four-coordinated distorted geometry with an ML₂
stoichiometry. Electrochemical investigations reveal that the redox behavior is
governed by the conjugated SNS backbone and the imine functionality, confirming
the donor–acceptor nature of the system. SEM analysis demonstrates a
heterogeneous and porous morphology, which is favorable for ion diffusion and
charge transport. Furthermore, metal coordination leads to a decrease in the
electrochemical band gap, confirming enhanced charge delocalization and
improved electronic properties. These results establish a clear correlation
between coordination-induced electronic modulation and electrochemical
behavior. In addition, the incorporation of heteroatoms (N, O, and S) within
the ligand framework highlights the relevance of main group elements in tuning
coordination and electronic properties. Overall, this study provides valuable
insights into SNS-based Schiff base systems and demonstrates their potential
for electrochemical and optoelectronic applications.