Determination of Magnetic Anisotropy Tensors in Actinide Complexes Using Torque Magnetometry: A U(IV) Case Study.

ABSTRACT: In this study, we employed cantilever torque magnetometry to probe the magnetic anisotropy of a single crystal of U(DOTA)(H₂O) (DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid), representing, to the best of our knowledge, the first application of this technique to an actinide-based molecular system. Combining cantilever torque magnetometry data with ab initio calculations allowed us to determine the magnetic anisotropy tensor of the uranium center. The resulting parameters enabled direct comparison with the isoelectronic lanthanide complex previously reported in the literature as well as with ab initio predictions for the theoretical Es⁴⁺ isostructural analogue. We find that the magnetic anisotropy axes of U(DOTA)(H₂O) (

SUBMITTER: Tacconi L 

PROVIDER: S-EPMC12814344 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature