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Issue 48, 2018
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Magnetic on–off switching in redox non-innocent ligand bridged binuclear cobalt complexes

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Abstract

The redox non-innocent ligand 2,2′-bipyrimidine (bpym) reacted with two molar equivalents of LCo(tol) (L = CH(MeC[double bond, length as m-dash]NAr)2, Ar = 2,6-iPr2C6H3) to afford the binuclear CoII complex (LCo)2(μ-bpym) (1), in which the bpym moiety accepts two electrons from the metal centers and in the dianion state. Complex 1 readily underwent one-electron oxidation when treated with [Cp2Fe]+[BPh4] affording the cation salt [(LCo)2(μ-bpym)][BPh4] (2) with the bpym moiety in the radical anion state. Meanwhile, complex 2 could be converted back to 1 with elemental potassium. The magnetic studies revealed that complex 2 is a single molecular magnet (SMM) under a small external field, while 1 has no SMM activity. This represents a new example of a SMM exhibiting a fully reversible ‘on/off’ switching ability in anodic and neutral states.

Graphical abstract: Magnetic on–off switching in redox non-innocent ligand bridged binuclear cobalt complexes

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Publication details

The article was received on 17 Oct 2018, accepted on 16 Nov 2018 and first published on 16 Nov 2018


Article type: Communication
DOI: 10.1039/C8DT04157A
Citation: Dalton Trans., 2018,47, 17211-17215
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    Magnetic on–off switching in redox non-innocent ligand bridged binuclear cobalt complexes

    Y. Wang, J. Li, L. Zhang, C. Chen, R. Feng, Y. Zhao, Y. Zhang, G. Tan, Y. Song and X. Wang, Dalton Trans., 2018, 47, 17211
    DOI: 10.1039/C8DT04157A

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