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Issue 60, 2017
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A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands

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Abstract

We utilized a rigid ligand platform PyCp22− (PyCp22− = [2,6-(CH2C5H3)2C5H3N]2−) to isolate dinuclear Dy3+ complexes [(PyCp2)Dy-(μ-O2SOCF3)]2 (1) and [(PyCp2)Dy-(μ-Cl)]2 (3) as well as the mononuclear complex (PyCp2)Dy(OSO2CF3)(thf) (2). Compounds 1 and 2 are the first examples of organometallic Dy3+ complexes featuring triflate binding. The isolation of compounds 1 and 3 allows us to comparatively evaluate the effects of the bridging anions on the magnetization dynamics of the dinuclear systems. Our investigations show that although the exchange coupling interactions differ for 1 and 3, the dynamic magnetic properties are dominated by relaxation via the first excited state Kramers doublet of the individual Dy sites. Compounds 1 and 3 exhibit barriers to magnetization reversal (Ueff = 49 cm−1) that can be favorably compared to those of the previously reported examples of [Cp2Dy(μ-Cl)]2 (Ueff = 26 cm−1) and [Cp2Dy(thf)(μ-Cl)]2 (Ueff = 34 cm−1).

Graphical abstract: A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands

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Publication details

The article was received on 30 Mar 2017, accepted on 29 Jun 2017 and first published on 04 Jul 2017


Article type: Communication
DOI: 10.1039/C7CC02457F
Citation: Chem. Commun., 2017,53, 8419-8422
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    A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands

    C. P. Burns, B. O. Wilkins, C. M. Dickie, T. P. Latendresse, L. Vernier, K. R. Vignesh, N. S. Bhuvanesh and M. Nippe, Chem. Commun., 2017, 53, 8419
    DOI: 10.1039/C7CC02457F

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