Hybridized molecular materials based on [Mn2III] 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-dtthiole-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 crystallographically independent [Mn](+) monomer and three [Ni(dmit)(2)] molecules The SMM units were formed by dimerization of the Mn complex Ferromagnetic exchange parameter J(F) in the dimeric core (1 85 cm(-1)) can be estimated by Mn-O distance (2298A) 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 (rho(rt) = 0 3 Omega cm E-a = 0 08 eV in a crystal) without structural phase transition at ambient pressure Then this is a new type of conducting SMM (C) 2009 Elsevier B V All rights reserved