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Issue 13, 2017
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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 DyO8 coordination sphere

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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 DyO8 coordination environments with a slightly distorted square-antiprism D4d symmetry. 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 DyO8 coordination sphere and the value of Ueff has been established.

Graphical abstract: 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 DyO8 coordination sphere

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Publication details

The article was received on 12 Jan 2017, accepted on 28 Feb 2017, published on 28 Feb 2017 and first published online on 28 Feb 2017


Article type: Paper
DOI: 10.1039/C7DT00138J
Citation: Dalton Trans., 2017,46, 4278-4286
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    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 DyO8 coordination sphere

    I. Oyarzabal, A. Rodríguez-Diéguez, M. Barquín, J. M. Seco and E. Colacio, Dalton Trans., 2017, 46, 4278
    DOI: 10.1039/C7DT00138J

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