Phys. Chem. Chem. Phys. [POMAM]

Abstract :

A 16-line pattern has been theoretically predicted, but hitherto not reported, for the Electron Paramagnetic Resonance (EPR) spectrum of antiferromagnetically coupled Cu^II triangles experiencing isotropic exchange of isosceles magnetic symmetry. Now, the crystallization of such a triangular species and its X-ray structure determination in a polar space group, R3 (No. 146), has enabled its single crystal EPR study. Its detailed magnetic susceptibility, and X- and Q-band, powder and single crystal EPR spectroscopic study reveals the effect of molecular structure and of Dzyaloshinskii–Moriya interactions (DMI) on the g_‖, g_⊥ and A_‖ parameters of the spectrum; DMI is considered for the first time in such a context. Moreover, careful analysis of the spectrum allows the deconvolution of two slightly different cocrystallized magnetic species.

 

Reference :

Logesh Mathivathanan, Yiannis Sanakis, Raphael G. Raptis, Philippe Turek, and Athanassios K. Boudalis

Observation and deconvolution of a unique EPR signal from two cocrystallized spin triangles

Phys. Chem. Chem. Phys., first published 25 jun 2021 – DOI: https://doi.org/10.1039/D1CP01965A

 

Contact :

Athanassios K. Boudalis (https://pomam.chimie.unistra.fr/aboudalis/), POMAM, Institut de Chimie (UMR 7177).