The Origin of Magnetic Anisotropy and Single-Molecule Magnet Behavior in Chromium(II)-Based Extended Metal Atom Chains.

ABSTRACT: Chromium(II)-based extended metal atom chains have been the focus of considerable discussion regarding their symmetric versus unsymmetric structure and magnetism. We have now investigated four complexes of this class, namely, [Cr₃(dpa)₄X₂] and [Cr₅(tpda)₄X₂] with X = Cl^- and SCN^- [Hdpa = dipyridin-2-yl-amine; H₂tpda = N²,N⁶-di(pyridin-2-yl)pyridine-2,6-diamine]. By dc/ac magnetic techniques and EPR spectroscopy, we found that all these complexes have easy-axis anisotropies of comparable magnitude in their S = 2 ground state (|D| = 1.5-1.8 cm^-1) and behave as single-molecule magnets at low T. Ligand-field and DFT/CASSCF calcul

SUBMITTER: Cornia A 

PROVIDER: S-EPMC7901656 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature