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Issue 17, 2016
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Bis-phenoxido and bis-acetato bridged heteronuclear {CoIIIDyIII} single molecule magnets with two slow relaxation branches

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Abstract

Two bis-μ-phenoxido–bis-μ-acetato heterobimetallic {CoIIIDyIII} complexes 1 and 2, formulated as [CoIIIDyIIIL(μ-OAc)2(NO3)2] derived from the comparable hexadentate Schiff bases N,N′-ethylenebis(3-ethoxysalicylaldimine) and N,N′-ethylenebis(3-methoxysalicylaldimine) were synthesized and X-ray structure analysis confirms their nearly identical structures. These are the first examples of bis(μ-phenoxido)–bis(μ-carboxylato) {CoIIIDyIII} systems. The AC susceptibility measurements show that both complexes exhibit a field-induced slow magnetic relaxation with two relaxation branches. While the high-frequency process spans the usual range of the relaxation time for analogous single molecule magnets (τ0 ∼ 10−7 s), the low-frequency branch is as slow as τ ∼ 0.1 s at T = 1.9 K and B = 0.2 T.

Graphical abstract: Bis-phenoxido and bis-acetato bridged heteronuclear {CoIIIDyIII} single molecule magnets with two slow relaxation branches

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Publication details

The article was received on 02 Mar 2016, accepted on 18 Mar 2016 and first published on 18 Mar 2016


Article type: Paper
DOI: 10.1039/C6DT00848H
Citation: Dalton Trans., 2016,45, 7510-7520
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    Bis-phenoxido and bis-acetato bridged heteronuclear {CoIIIDyIII} single molecule magnets with two slow relaxation branches

    S. Hazra, J. Titiš, D. Valigura, R. Boča and S. Mohanta, Dalton Trans., 2016, 45, 7510
    DOI: 10.1039/C6DT00848H

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