Work

Strong antiferromagnetic interaction in µ-Oxo-bridged diiron(III) complex and paramagnetic nickel(II) complex of pyridoxal Schiff base ligands

Year: 2026

Type: article

Abstract: Dinuclear and mononuclear pyridoxal Schiff base complexes, specifically [{FeL} 2 ( µ -O)]·2.2H 2 O ( 1 ) and [NiL’(H 2 O)]·2H 2 O ( 2 ) (where L 2– is the dianion of tetradentate Schiff base derived from pyridoxal and ethylenediamine, and L’ 2– is the dianion of pentadentate Schiff base ligand formed from pyridoxal and N -(2-aminoethyl)propane-1,3-diamine) have been synthesized and characterized by elemental analysis, FT-IR, and mass spectrometry. The crystal structures of these complexes were determined using single crystal X-ray diffraction. The Fe atoms in complex 1 exhibit a distorted square pyramidal coordination geometry, while Ni atom in complex 2 displays a distorted octahedral geometry. Experimental magnetic investigation of complex 1 indicated a strong antiferromagnetic coupling between the two Fe(III) centers and a paramagnetic behavior of an octahedral Ni(II) complex 2 with two unpaired electrons. Density functional theory (DFT) calculations were performed, and the calculation results were compared with the experimental structural and magnetic characteristics of the complexes.

Source: Transition Metal Chemistry

DOI: 10.1007/s11243-025-00713-y

Authors: Viera Murašková, Václav Eigner, David Sedmidubský

Institutions: University of Chemistry and Technology, Prague, FZU - Institute of Physics of the Czech Academy of Sciences

Language: English

Topic: Magnetism in coordination complexes

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,990

Funder: Vysoká Škola Chemicko-technologická v Praze