Hybridized molecular materials based on [Mn^III₂] single molecule magnets with molecular conductors [Ni(dmit)₂] ^n-

A new hybridized molecular crystal [Mn(5-MeOsaltmen)(acetone)] ₂[Ni(dmit)₂]₆ (5-MeOsaltmen^2- = N,N'-(1,1,2,2-tetramethylethylene)bis(5-methoxysalicylideneiminate), dmit ^2-=2-thioxo-1,3-dithiole-4,5-dithiolate) based on [Mn] ²⁺₂ dimer as a single molecule magnet (SMM) and the dithiolene complex [Ni(dmit)₂] as a conducting part was prepared by electrochemical crystallization of (Bu₄N)[Ni(dmit)₂] in acetone with [Mn(5-MeOsalmen)(H₂O)](PF₆). An segregating stacking arrangement of the SMM layers and conducting layers is formed, where the magnetic and conducting layers involve one crystal-lographically independent [Mn]⁺ monomer and three [Ni(dmit)₂] molecules. The SMM units were formed by dimerization of the Mn complex. Ferromagnetic exchange parameter JF in the dimeric core (1.85cm^-1) can be estimated by Mn-O distance (2.298Å) in the out-of-plane dimeric core. For conducting part, overlap integral calculation between [Ni(dmit)₂] acceptors in the salt suggests the existence of quasi one-dimensional interactions among the acceptors. The compound exhibits semiconducting behavior from room temperature to 50K (ρ_r.t=0.3ωcm, E_a=0.08eV in a crystal) without structural phase transition at ambient pressure. Then, this is a new type of conducting SMM.