Abstract
Two unique dodecanuclear lanthanide clusters, [LnIII12Na3(µ3‐OH)2(hmmp)6(piv)12(CO3)6(MeOH)6]OH·5MeOH {Ln = Gd3+, Dy3+; hmmpH2 = 2‐[(2‐hydroxyethylimino)methyl]‐6‐methoxyphenol}, have been synthesized by treating the simple Schiff‐base ligand hmmpH2 with the relevant lanthanide chloride and sodium pivalate (NaPiv). Single‐crystal X‐ray diffraction analysis revealed that the central cores of Gd12 and Dy12 are unprecedented and composed of a distorted four‐layer triangular shelf‐like molecular structure, which can be broken down into two types of four parallel triangular layers with an ABBA arrangement. Magnetic investigations revealed that the Gd12 cluster is a good candidate for magnetic refrigeration with a significant entropy change (–ΔSm) of 30.99 J kg–1 K–1 for H = 7 T at 4 K, whereas the Dy12 cluster shows single‐molecule magnet behavior.
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