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Issue 25, 2017
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Geometry and magnetic interaction modulations in dinuclear Dy2 single-molecule magnets

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Abstract

Geometry and magnetic interaction modulations in a series of dinuclear dysprosium compounds, [Dy2Lz2(OAc)6]·2CH3OH (1), [Dy2Lz2(C6H5CO2)6]·2CH3CN (2), and [Dy2L2(SO3CF3)4THF4] (3) (Lz = 6-pyridin-2-yl-[1,3,5]triazine-2,4-diamine; L = N-(2,3-dimethylbut-3-en-2-yl)-N-hydroxynitrous amide; THF = tetrahydrofuran), can effectively tune the relaxation dynamics of magnetization. The dysprosium centres of compounds 2 and 3 display a hula hoop-like geometry; however, those in 1 show the monocapped square antiprismatic geometries. Moreover, the Dy2 cores of compounds 1 and 3 were linked by μ2–η11 and μ2–η12 bridging modes, thus generating shorter intramolecular Dy⋯Dy distances as compared to those in compound 2. Consequently, these three compounds demonstrate distinct magnetic properties. Compounds 1 and 2 behave as single-molecule magnets (SMMs) under an appropriate static dc field; in addition, 2 displays field-induced multiple relaxation processes under a 1000 Oe dc field. Compound 3 shows a high relaxation energy barrier of 102 K in the zero dc field. These three interesting compounds with Dy2 cores shed light on the coordination geometry and magnetic interactions for the modulation of the properties of SMMs.

Graphical abstract: Geometry and magnetic interaction modulations in dinuclear Dy2 single-molecule magnets

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Publication details

The article was received on 29 Mar 2017, accepted on 01 Jun 2017 and first published on 01 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01121K
Citation: Dalton Trans., 2017,46, 8252-8258
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    Geometry and magnetic interaction modulations in dinuclear Dy2 single-molecule magnets

    M. Guo, Y. Xu, J. Wu, L. Zhao and J. Tang, Dalton Trans., 2017, 46, 8252
    DOI: 10.1039/C7DT01121K

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