title: The effect of the disposition of coordinated oxygen atoms on the magnitude of the energy barrier for magnetization reversal in a family of linear trinuclear Zn-Dy-Zn complexes with a square-antiprism DyO8coordination sphere.
abstract: A series of trimetallic Zn-Dy-Zn complexes of the general formula [ZnX(μ-L)Dy(μ-L)XZn]Y·nS, where H2L is the compartmental ligand N,N'-dimethyl-N,N'-bis(2-hydroxy-3-formyl-5-bromobenzyl)ethylenediamine, X is the coligand (X = Cl, Br, I and N3), Y is the counteranion and S are the crystallization solvent molecules have been synthesized and magnetically characterized. In all these complexes, the Dy(iii) ions exhibit DyO8coordination environments with a slightly distorted square-antiprism D4dsymmetry. Due to the disposition of the oxygen atoms around the Dy(iii) ions, large easy-axis anisotropy is expected, which is responsible for the high thermal energy barriers for the reversal of the magnetization observed at zero field (in the 144-170 K range for all complexes). A preliminary correlation between the disposition of the oxygen atoms of the ligand (phenoxo and aldehyde) in the DyO8coordination sphere and the value of Ueffhas been established.
authors.affiliation: Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel de Lardizabal, no. 3, 20018, Donostia-San Sebastián, Spain. josemanuel.seco@ehu.es.
authors.forename: Itziar
authors.initials: I
authors.lastname: Oyarzabal
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain. ecolacio@ugr.es.
authors.forename: Antonio
authors.initials: A
authors.lastname: Rodríguez-Diéguez
authors.affiliation: Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel de Lardizabal, no. 3, 20018, Donostia-San Sebastián, Spain. josemanuel.seco@ehu.es.
authors.forename: Montserrat
authors.initials: M
authors.lastname: Barquín
authors.affiliation: Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco UPV/EHU, Paseo Manuel de Lardizabal, no. 3, 20018, Donostia-San Sebastián, Spain. josemanuel.seco@ehu.es.
authors.forename: José M
authors.identifier: http://orcid.org/0000-0002-5131-6764
authors.initials: JM
authors.lastname: Seco
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain. ecolacio@ugr.es.
authors.forename: Enrique
authors.initials: E
authors.lastname: Colacio