A [Mn_(32)] Double-Decker Wheel

摘要

Polynuclear clusters of paramagnetic 3d metal ions continue to attract significant interest because of their intriguing geometrical characteristics (large size, high symmetry, aesthetically pleasing shapes and architectures) and fascinating physical properties. Such complexes often combine large and sometimes abnormally large spin ground states with easy-axis-type magnetic anisotropy, resulting in a significant barrier to magnetization relaxation.Thus, at sufficiently low temperatures they function as single-domain magnetic particles displaying magnetization hysteresis and quantum tunneling of the magnetization (QTM).Such single-molecule magnets (SMMs) represent a molecular approach to nanoscale magnetic materials with potential applications in information storage and molecular spintronics. SMMs with nuclearities up to 84 and structural topologies as diverse as (amongst others) dimers, triangles, cubanes, tetrahedra, icosahedra, and wheels are now known.