In One Fell Sweep: Modeling Exchange, Hyperfine and Dipolar Interactions from EPR Spectra of Copper(II) Spin Triangles

The weak intramolecular magnetic interactions within a series of CuII3 complexes based on the trinucleating 2,4,6-tris(di-2-pyridylamino)-1,3,5-triazine (dipyatriz) ligand were investigated via Electron Paramagnetic Resonance (EPR) spectroscopy. X- and Q-band EPR spectroscopy in powders and frozen solutions were recorded and the Q-band spectra were interpreted by a multispin Hamiltonian model comprising exchange, dipolar and hyperfine interactions. The described methodology is suitable for the elucidation of weak intramolecular interactions which are not amenable to analysis via magnetic susceptibility studies.

Automated summary

The weak intramolecular magnetic interactions within CuII3 complexes were investigated using EPR spectroscopy. The Q-band spectra were interpreted using a multispin Hamiltonian model, which includes exchange, dipolar, and hyperfine interactions. This methodology is suitable for studying weak intramolecular interactions that cannot be analyzed through magnetic susceptibility studies.