Abstract
Two trinuclear complexes of formulae [Dy3(µ3-H2O)(hmp)3(CH3COO)3] (1) and [Gd3(µ3-H2O)(hmp)3(CH3COO)3] (2) were synthesized by employing Dy(CH3COO)3·6H2O and Gd(CH3COO)3·6H2O as lanthanide sources and a Schiff-base H2hmp (H2hmp = 2-(((2-hydroxy-3-methoxybenzyl)imino)methyl)-5-methoxyphenol) as a ligand. Single crystal X-ray diffraction analyses reveal that compounds 1 and 2 are isostructural. The three LnIII ions are bridged by three doubly-deprotonated Schiff-base ligands hmp2−, three acetate ions and one µ3-H2O molecule, forming a regular triangle structure (Ln…Ln…Ln angles of 60°, and Ln…Ln distances of 3.812 Å for 1, and 3.838 Å for 2). Magnetic property studies for 1 and 2 indicate that complex 1 displays field-induced single-molecule magnet (SMM) behavior, and there are weak antiferromagnetic interactions among three GdIII ions in complex 2. The main magnetic axes on DyⅢ ions of 1 are calculated by complete-active-space self-consistent field (CASSCF) calculations.
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