Syntheses, crystal structures, and magnetic properties of two monometallic tri-spin complexes involving nitronyl nitroxide radicals-lanthanide ions |
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Authors: | R N Liu S P Zhao C X Xiong |
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Institution: | 1. School of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430073, P.R. China
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Abstract: | Two new lanthanide-radical complexes Ln(Hfac)3(NIT-4PhAllO)2](Ln(III) = Gd (I), Tb (II); Hfac = hexafluoroacetylacetonate; NIT-4PhAllO = 4′-allyloxyphenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been prepared and characterized in structurally as well as magnetically. Single crystal X-ray diffraction analyses reveal that two complexes are isostructural with mononuclear tri-spin structure, in which the metal ions are eight-coordinated in distorted dodecahedron geometry. The nitronyl nitroxide radicals act as monodentate ligands towards Ln(Hfac)3 unit through the oxygen atom of the nitronyl nitroxide group. Magnetic studies reveal that the Gd-coordinated nitroxide interaction is ferromagnetic. |
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