作为新型单离子磁体的 1,1′-二甲基-4,4′-联吡啶鎓四（六氟乙酰丙酮）镝（iii）盐

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Russian Chemical Bulletin Pub Date : 2024-09-19 DOI:10.1007/s11172-024-4344-1

V. P. Stefanets, N. A. Sanina, G. V. Shilov, A. I. Dmitriev, M. V. Zhidkov, S. M. Aldoshin

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引用次数: 0

摘要

我们合成了两种成分为 Na[Dy(hfac)4] (1) 和 Q[Dy(hfac)4]2 (2)（其中 hfac 为六氟乙酰丙酮阴离子，Q 为 1,1′-二甲基-4,4′-联吡啶鎓）的复合镝（iii）盐，并利用 X 射线衍射对它们进行了研究。利用 Shape 程序对 X 射线衍射数据进行的分析表明，盐 2 阴离子的两个 [DyO8] 配位多面体发生了明显的畸变；Dy 原子不等价，具有双偏角三棱柱（C2v）和三角十二面体（D2d）几何形状。对 2 的磁性能进行的实验研究和分析表明，这种化合物表现出场诱导的缓慢磁化弛豫，这种弛豫是用奥尔巴赫机制描述的（Ueff = 23.0 K，τ0 = 2.68 - 10-8 s）。

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Salt of dysprosium(iii) tetrakis(hexafluoroacetylacetonate) with 1,1′-dimethyl-4,4′-bipyridinium as a new single-ion magnet

Two complex dysprosium(iii) salts of composition Na[Dy(hfac)₄] (1) and Q[Dy(hfac)₄]₂ (2), where hfac is the hexafluoroacetylacetonate anion and Q is 1,1′-dimethyl-4,4′-bipyridinium, were synthesized and studied by X-ray diffraction. An analysis of the X-ray diffraction data using the Shape program revealed noticeable distortions of two [DyO₈] coordination polyhedra of salt 2 anions; the Dy atoms are nonequivalent and have a biaugmented trigonal prismatic (C_2v) and triangular dodecahedral (D_2d) geometry. The experimental studies and the analysis of the magnetic properties of 2 showed that this compound exhibits a field-induced slow relaxation of magnetization, which is described by the Orbach mechanism (U_eff = 23.0 K, τ₀ = 2.68 · 10⁻⁸ s).

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来源期刊

Russian Chemical Bulletin 化学-化学综合

CiteScore

2.70

自引率

47.10%

发文量

257

审稿时长

3-8 weeks

期刊介绍： Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections: General and Inorganic Chemistry; Physical Chemistry; Organic Chemistry; Organometallic Chemistry; Chemistry of Natural Compounds and Bioorganic Chemistry.