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Magnetic relaxation and luminescent behavior in nitronyl nitroxide-based annuluses of rare-earth ions |
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Abstract: Employing the reaction of chiral nitronyl nitroxide radical and rare-earth ions, two 2p-4f hetero-spin meso complexes[Ln(hfac)3((R)-MePP-Ph-NIT)]2, where Ln=Eu (1) and Dy (2), hfac=hexafluoroacetylacetone; (R)-MePPPh-NIT=2-(4-((R)-tert-butyl-2-methylpiperazine-1-carboxylate)phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3oxide, have been assembled. In both complexes, two chiral radicals ligate to two Ln(Ⅲ) ions to produce a cyclic dinuclear structure. Complex 1 shows the characteristic fluorescence emission of the Eu(Ⅲ) ion. In complex 2, the frequency-dependent out-of-phase susceptibility signals connected with magnetic relaxation confirm single-molecule magnet (SMM) behavior. |
Keywords: nitronyl nitroxide single-molecule magnet rare-earth ion 2p-4f hetero-spin |
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LI Hongdao,ZHANG Shengjian,DONG Hongmei.Magnetic relaxation and luminescent behavior in nitronyl nitroxide-based annuluses of rare-earth ions[J].Chinese Journal of Inorganic Chemistry,2024,40(5):972-978. |
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