Front Cover: Three Single-Ion Magnet Candidates from Erbium(III) Squarate Complexes in Relation with a Square-Antiprismatic Coordination Structure (Eur. J. Inorg. Chem. 23/2025)

Abstract

The Front Cover shows the result of CAS calculations performed on the discrete neutral molecule [Er(sq)(Hsq)(H₂O)₆]. The energy gap between the ground and first excited Kramers doublets was evaluated based on two types of structural modifications to the ErO₈ square antiprism: (1) Isotropic expansion and contraction, where contraction leads to a larger gap, as expected from the stronger crystal field. (2) Anisotropic compression and elongation along the principal axis, both of which result in a wider energy gap. More information can be found in the Research Article by T. Ishida and co-workers (DOI: 10.1002/ejic.202500184).