Inside Cover: Magnetization Dynamics on Isotope‐Isomorphic Holmium Single‐Molecule Magnets (Angew. Chem. Int. Ed. 52/2021)

Abstract

Nuclear-spin driven relaxation collaborating with the ligands in lanthanide single molecule magnets (SMMs) remains ambiguous. In their Communication on page 27282, Liviu Ungur, Jun-Liang Liu, and co-workers report two HoIII isotopic-isomorphic SMMs, whose magnetization dynamics reveals a switch in the relative relaxation rates at low/high temperatures. A theoretical analysis suggests that the noticeable isotope effect arises from the tunnel splitting and the super-hyperfine interaction related to the distinct nuclear spin numbers of 1H and 2H.