Hydrothermal Synthesis, Structural Elucidation, and Magnetic Behavior of a Cobalt-Based Complex with Cinnamate and Medpq Ligands

Document Type : Review Article

Author

Department of chemistry, Faculty of Sciences, Tarbiat modares University

10.22091/jaem.2025.3809

Abstract

A cobalt-based coordination complex, [Co₁.₅(C₆H₅CH=CHCOO)₃(Medpq)]·H₂O (where C₆H₅CH=CHCOO⁻ denotes cinnamate and Medpq stands for 2-methyldipyrido[3,2-f:2',3'-h]quinoxaline), was successfully synthesized via a hydrothermal method. Its structure and properties were characterized using elemental analysis, infrared spectroscopy (IR), thermogravimetric analysis (TGA), single-crystal X-ray diffraction, and magnetic susceptibility measurements. The complex crystallizes in the triclinic space group P-1, with unit cell parameters: a = 10.224(5) Å, b = 14.572(5) Å, c = 15.139(5) Å, α = 112.704(5)°, β = 97.168(5)°, γ = 109.749(5)°, and a unit cell volume of 1871.8(13) ų (Z = 2, at 293(2) K). In the crystal structure, the Co1 ion is coordinated by six atoms from three distinct cinnamate ligands, forming a symmetrical coordination environment. Meanwhile, the Co2 center is surrounded by two nitrogen atoms from the Medpq ligand and four oxygen atoms from two cinnamate ligands, resulting in a slightly distorted octahedral geometry. Magnetic measurements reveal a negative Weiss constant, indicating the presence of antiferromagnetic exchange interactions between cobalt ions, suggesting that this complex is a promising candidate for magnetic material applications.

Keywords

Advances in Energy and Materials Research

Articles in Press, Accepted Manuscript
Available Online from 29 March 2025

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