Molecular Engineering for Single-Chain-Magnet Behavior in a One-Dimensional Dysprosium-Nitronyl Nitroxide Compound

Single-chain magnets: A rational approach to decrease magnetic dipolar interactions led to the chain compound [Dy(hfac)3{NIT(C6H4OPh)}] (see structure; NIT(R): 2-(4?-R)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), the first rare-earth-radical-based single-chain magnet. The compound shows slow relaxation behavior, a dynamical crossover resulting from finite-size effects, and a very rich static magnetic behavior