Helical water-soluble Ni complexes with pyridoxal ligand derivatives: Structural evaluation and interaction with biomacromolecules.

This article deals with the synthesis of Schiff-based bis-azomethine-based ligands derived from pyridoxal and aliphatic dihydrazides and the synthesis of nickel(II) complexes C1-C4. The synthesized complexes had their structures elucidated by monocrystal X-ray diffraction and were characterized by vibrational and absorption spectroscopy. The synthesized ligands have characteristics that allow the formation of self-assembly processes, thus, the flexibility or rigidity of the coordination of organic molecules added to the orbitals of the Ni cation leads to the formation of helical complexes with double helix and a dinucler nickel(II) complex.