Slow Magnetic Relaxation in an Octanuclear Manganese Chain

A one-dimensional chain containing a mixed-valence octanuclear manganese(II,III) building unit, (NEt4)2n[Mn8O2(salox)6(N3)8(MeOH)3]n (H2salox = salicylaldoxime), was synthesized and characterized structurally and magnetically. Each building unit contains a [MnII2MnIII6O2]18+ structural topology. The frequency dependence of the out-of-phase component in alternating current magnetic susceptibilities and hysteresis loops for the complex indicates single-chain-magnet-like behavior.