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Issue 13, 2015
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Three new mononuclear tri-spin lanthanide-nitronyl nitroxide radical compounds: syntheses, structures and magnetic properties

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Abstract

Based on the nitronyl nitroxide radical, 2-(4-(methoxycarbonyl)phenyl)-4,4,5,5-tetramethylimidazolin-1-oxyl-3-oxide (1, NITPhCOOMe), and three mononuclear tri-spin compounds [Ln(hfac)3(NITPhCOOMe)2] (Ln = Gd (2), Tb (3), Dy (4); hfac = hexafluoroacetylacetonate) are successfully synthesized and fully characterized. Compounds 2 and 4 are isostructural and crystallize in the C2/c space group, while compound 3 crystallizes in the P21/c space group. For compounds 2–4, the central metal ions are all eight-coordinate in distorted triangular dodecahedral LnO8 coordination geometry (D2d symmetry) completed by three bischelate hfac ligands and two monodentate radicals. Magnetic studies show that radical 1 undertakes the transition from the paramagnetic state to 3D antiferromagnetic ordering at 4.2 K. In addition, compound 3 exhibits field-induced single-molecule magnet (SMM) behavior.

Graphical abstract: Three new mononuclear tri-spin lanthanide-nitronyl nitroxide radical compounds: syntheses, structures and magnetic properties

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The article was received on 20 Dec 2014, accepted on 16 Feb 2015 and first published on 16 Feb 2015


Article type: Paper
DOI: 10.1039/C4DT03941F
Citation: Dalton Trans., 2015,44, 6118-6125
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    Three new mononuclear tri-spin lanthanide-nitronyl nitroxide radical compounds: syntheses, structures and magnetic properties

    L. Li, S. Liu, Y. Zhang, W. Shi and P. Cheng, Dalton Trans., 2015, 44, 6118
    DOI: 10.1039/C4DT03941F

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