Cyanometalate complexes provide a convenient platform for the isolation of structurally related materials by using a building-block or modular synthetic approach. Introduction of suitable chelate/capping ligands on metallic centers may effectively tune the ligand field, redox potentials, as well as electronic configurations without changing structural archetypes. As such, targeted materials with expected physical properties can be systematically studied. Since the first cyanide-bridged single chain magnet (SCM) with the formula of {[FeIII(L)(CN)4]2CoII(H2O)2}·4H2O (L = 2,2¢-bipyridine or 1,10-phenanthroline), which consists of neutral cyanide-bridged FeIII-CoII double zigzag chains, or the “so-called” 4,2-ribbon chain, was reported in 2003, several related cyanide SCMs have been developed with the same basic architecture that contain a favourable parallel arrangement of the anisotropic metal units. We recently prepared a new tape-like SCM by introducing [MnIII(CN)6]3- anions into the centrosymmetric linear trinuclear compound [(tptz)2MnII3(OAc)6] (1, tptz = 2,4,6-tri(2-pyridyl) -1,3,5-triazine): {[(tptz)MnII(H2O)MnIII(CN)6]2MnII(H2O)2}n×4nMeOH×2nH2O (2). Magnetic studies reveal that 2 exhibits long-range magnetic ordering below 5.1 K due to both intra- and inter-chain antiferromagnetic couplings as well as SCM behaviour at lower temperatures with an effective energy barrier of 40.5(7) K.

Cyanide-bridged single chain magnets with hexacyanomanganate

249th National Meeting (2015)

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