Abstract
The synthesis, structural characterization and magnetic studies of the 1D coordination polymer [MnIII2MnII(L)2(N3)2(MeOH)2]n (1) is presented. Compound 1 consists of MnIII-MnII-MnIII strictly linear trinuclear repeating units with bis(end-on azido/alkoxo) bridges between the central MnII ion and each one of the terminal MnIII ions, defining two rhombic units [MnIIIMnII(μ1,1-N3)(μ-OR)]. Each repeating unit is further linked to its neighboring ones through two μ-OR groups, defining rhombic units [MnIII2(μ-OR)2], thus promoting the chain structure of 1. The magnetic studies revealed that 1 displays single-chain magnet behavior (SCM) with energy barrier Δ = 53 ± 1 K. Compound 1 is the first example of SCM based on a mixed-valence linear trinuclear unit [MnIII2MnII(μ1,1-N3)2(μ-OR)2].
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