Dy(III) single-ion magnet showing extreme sensitivity to (de)hydration

A new mononuclear dysprosium(III)-cucurbit[6]uril com- plex has been synthesized and characterized structurally and magnetically. It exhibits single-ion magnet (SIM) behavior with two slow magnetic relaxation processes, which are very sensitive to the solvation degree of the sample. Depending on the amount and type of the solvent in the structure, it is possible to switch the slow magnetic relaxation of this compound between the temperature-independent and temperature- dependent regimes.