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The study aims to synthesize and characterize novel copper(II) complexes with a focus on their structural and magnetic properties.

June 20, 2026ACS OmegaOpen Access

Tri-, Tetra-, Octa-Nuclear Copper Complexes Including the First Mode Cubane-like Cu 4 O 3 N Core: Synthesis, Structure, and Magnetic Properties

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Randomized trial investigates the synthesis of copper complexes, revealing unique magnetic properties in novel structures.

The study aims to synthesize and characterize novel copper(II) complexes with a focus on their structural and magnetic properties.
Synthesis of copper complexes using Schiff base ligand H4L, sodium azide, and Cu(II) salts.
Characterization performed through single-crystal X-ray diffraction and temperature-dependent magnetic susceptibility measurements.
ESR spectra analysis conducted at 300 K and 90 K.
Complex 2 exhibits a unique octa-nuclear structure with smaller Cu–O–Cu bond angles resulting in antiferromagnetic coupling.
Complex 1 shows both ferromagnetic and antiferromagnetic interactions with Cu–O–Cu bridging angles ranging from 77.81° to 112.77°.
ESR analysis confirms the d x2 − y2 ground state for Cu(II) ions with observed forbidden half-field transitions for complex 2.

Pastor‐Ramírez et al. (2026) studied this question.

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