paper

High-frequency EPR study on Cu $_{4}$ Cu- and Co $_{4}$ Co-metallacrown complexes

arXiv:1903.04031 · doi:10.1016/j.jmmm.2019.01.038

Abstract

High-frequency/high-field electron paramagnetic resonance studies on two homo-nuclear 12-MC-4 metallacrown complexes Cu $_{4}$ Cu and Co $_{4}$ Co are presented. For Cu $_{4}$ Cu, our data imply axial-type $g$ -anisotropy with $g_{x}$ = 2.03 $\pm$ 0.01, $g_{y}$ = 2.04 $\pm$ 0.01, and $g_{z}$ = 2.23 $\pm$ 0.01, yielding $g = 2.10 \pm 0.02$ . No significant zero field splitting (ZFS) of the ground state mode is observed. In Co $_{4}$ Co, we find a m $_{S}$ = $\pm$ 3/2 ground state with $g = 2.66$ . The data suggest large anisotropy $D$ of negative sign.

High-frequency EPR study on Cu4​Cu- and Co4​Co-metallacrown complexes

Abstract

High-frequency EPR study on Cu $_{4}$ Cu- and Co $_{4}$ Co-metallacrown complexes