title: The Nature of the Bridging Anion Controls the Single-Molecule Magnetic Properties of DyX4M 12-Metallacrown-4 Complexes.
abstract: A family of DyX4M(12-MCMnIII(N)shi-4) compounds were synthesized and magnetically characterized (X = salicylate, acetate, benzoate, trimethylacetate, M = NaIor KI). The bridging ligands were systematically varied while keeping the remainder of the MC-geometry constant. The type of monovalent cation, necessary for charge balance, was also altered. The dc magnetization and susceptibility of all compounds were similar across the series. Regardless of the identity of the countercation, the Dy(Hsal)4M 12-MC-4 compounds were the only compounds to show frequency-dependent ac magnetic susceptibility, a hallmark of single-molecule magnetism. This indicates that the nature of the bridging ligand in the 12-MCMnIII(N)shi-4 compounds strongly affects the out-of-phase magnetic properties. The SMM behavior appears to correlate with the pKaof the bridging ligand.
authors.affiliation: Department of Chemistry, Slippery Rock University , Slippery Rock, Pennsylvania 16057, United States.
authors.forename: Thaddeus T
authors.initials: TT
authors.lastname: Boron
authors.affiliation: Department of Chemistry, Shippensburg University , Shippensburg, Pennsylvania 17257-2200, United States.|Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48108-1005, United States.
authors.forename: Jacob C
authors.initials: JC
authors.lastname: Lutter
authors.affiliation: Department of Chemistry, Shippensburg University , Shippensburg, Pennsylvania 17257-2200, United States.
authors.forename: Connor I
authors.initials: CI
authors.lastname: Daly
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48108-1005, United States.
authors.forename: Chun Y
authors.initials: CY
authors.lastname: Chow
authors.affiliation: Department of Chemistry, Slippery Rock University , Slippery Rock, Pennsylvania 16057, United States.
authors.forename: Andrew H
authors.initials: AH
authors.lastname: Davis
authors.affiliation: Department of Chemistry, Youngstown State University , Youngstown, Ohio 44555-0001, United States.
authors.forename: Arunpatcha
authors.initials: A
authors.lastname: Nimthong-Roldán
authors.affiliation: Department of Chemistry, Youngstown State University , Youngstown, Ohio 44555-0001, United States.
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeller
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48108-1005, United States.
authors.forename: Jeff W
authors.initials: JW
authors.lastname: Kampf
authors.affiliation: Department of Chemistry, Shippensburg University , Shippensburg, Pennsylvania 17257-2200, United States.
authors.forename: Curtis M
authors.initials: CM
authors.lastname: Zaleski
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48108-1005, United States.
authors.forename: Vincent L
authors.initials: VL
authors.lastname: Pecoraro