Rotaxane Co ^II Complexes as Field‐Induced Single‐Ion Magnets

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in context CoII-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements found that these complexes show some highest zero field splittings reported five-coordinate CoII to date. The predictable coordination behaviour interlocked allowed magnetic properties their be evaluated computationally a priori our combined experimental theoretical approach enabled us rationalize observed trends. rotaxane demonstrates offer new strategy design with interesting functionality.