Two novel Zn–Ln (Ln = Dy (1), Tb (2)) complexes showing single molecule magnet behaviors have been reported.

In this work, we employed an asymmetric auxiliary organic ligand (1,1,1-trifluoroacetylacetone, Htfac) to further regulate the magnetic relaxation behavior of series of Dy 2 single-molecule magnets (SMMs) with a N1,N3-bis(3methoxysalicylidene)diethylenetriamine (H 2 L) ligand. Fortunately, an air-stable Dy 2 complex, [Dy 2 (L) 2 (tfac) 2 ] (1; Htfac = 1,1,1trifluoroacetylacetone) was obtained at room temperature. A structural analysis indicated that some Dy−O or Dy−N bond lengths for 1 are not in the range of those for the complexes [Dy III

Four chair-like [Fe4Ln2] (Ln = Gd, Dy, Ho and Er) complexes with mixed organic ligands have been obtained. [Fe4Dy2] exhibits single molecule magnet behavior.

Five novel [Cu6Ln2] complexes were synthesized, wherein LnIII ions are seven-coordinate and coordinated by one triethanolamine and three di-2-pyridyl ketone ligands, without coordinated solvent molecules and small anions.