title: Anion-perturbed magnetic slow relaxation in planar {Dy4} clusters.
abstract: Two planar tetranuclear dysprosium(III) complexes, [Dy(4)(mu(3)-OH)(2)(hmmpH)(2)(hmmp)(2)(Cl)(4)].3MeCN.MeOH (1) and [Dy(4)(mu(3)-OH)(2)(hmmpH)(2)(hmmp)(2)(N(3))(4)].4MeOH (2) {hmmpH(2) = 2-[(2-hydroxyethylimino)methyl]-6-methoxyphenol}, which exhibit an anion-dependent magnetic slow relaxation behavior, have been synthesized by in situ condensation of o-vanillin and 2-aminoethanol. The higher energy barrier observed in 2 could be the result of a more favorable crystal field and/or orientations of single-ion easy axes of magnetization of the Dy(III) ions.
authors.affiliation: Institut fur Anorganische Chemie, Universitat Karlsruhe (TH), Engesserstrasse Geb. 30.45, 76128 Karlsruhe, Germany.
authors.forename: Yan-Zhen
authors.initials: YZ
authors.lastname: Zheng
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Lan
authors.forename: Christopher E
authors.initials: CE
authors.lastname: Anson
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell