title: Five Rare μ4-O-Centered Ln6Clusters with Single-Molecule Magnet Behavior for Dy6.
abstract: Five hexanuclear lanthanide clusters of composition [Ln6(μ4-O)2(HCOO)2L4(HL')2(dmf)2] [Ln=Dy (1), Er (2), Ho (3), Tb (4), Gd (5); H2L=2-{[2-(hydroxymethyl)phenylimino]methyl}-6-methoxyphenol; H3L'=3-{[2-(hydroxymethyl)phenylimino]methyl}benzene-1,2-diol; H3L' was derived in situ from the H2L ligand] were prepared under solvothermal conditions. The [Ln6] cores of 1-5 possess an unprecedented motif, namely, two tetrahedron Ln4units sharing an edge and two vertices. The six LnIIIions of 1-5 are connected through two μ4-O anions. Magnetic susceptibility studies reveal that complex 1 exhibits frequency dependence of the alternating current susceptibility typical of single-molecule magnets. Complex 1 possesses a relatively large energy barrier of 85 K among all of the reported Dy6single-molecule magnets.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.|Department of Chemistry and Chemical Engineering, Jining University, Qufu, 273155, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and Chemical Engineering, Jining University, Qufu, 273155, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Liu
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
authors.forename: Yahong
authors.initials: Y
authors.lastname: Li
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Dong
keywords: double tetrahedron; isomorphism; lanthanides; magnetic properties; polynuclear complexes