| 具有磁弛豫和荧光性能的氮氧自由基-稀土离子环形双核 |
| Magnetic relaxation and luminescent behavior in nitronyl nitroxide-based annuluses of rare-earth ions |
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| 摘要: 选用手性氮氧自由基与稀土离子反应，成功组装了2例2p-4f异自旋内消旋配合物[Ln (hfac)3((R)-MePP-Ph-NIT)]2，其中Ln=Eu (1)、Dy (2)，hfac=六氟乙酰丙酮，(R)-MePP-Ph-NIT=2-(4-((R)-tert-butyl-2-methylpiperazine-1-carboxylate) phenyl)-4，4，5，5-tetramethylimidazoline-1-oxyl-3-oxide。在配合物中，氮氧自由基配体连接2个稀土离子形成环形双核结构。配合物1展现出铕离子的特征荧光。在配合物2中，磁弛豫相关的频率依赖的虚部信号说明了其单分子磁体的特性。 |
| 关键词: 氮氧自由基 单分子磁体 稀土离子 2p-4f异自旋 |
| 基金项目: 山西省基础研究项目-自由探索类（No.20210302124460）资助。 |
| 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 |
| 投稿时间：2023-10-30 修订日期：2024-01-24 |
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| 李弘道,张胜健,董红梅.具有磁弛豫和荧光性能的氮氧自由基-稀土离子环形双核[J].无机化学学报,2024,40(5):972-978. |
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