• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利：CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法，用中文像聊天一样搜索，搜遍4000万医学文献。AI智能推荐，让科研检索更轻松。

立即免费搜索

文件翻译

保留排版，准确专业，支持PDF/Word/PPT等文件格式，支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述，25分钟生成高质量综述，智能提取关键信息，辅助科研写作。

立即免费体验

通过极化中子衍射实验测定的Ho(III)和Dy(III)单分子磁体的磁各向异性。

Magnetic anisotropies of Ho(III) and Dy(III) single-molecule magnets experimentally determined polarized neutron diffraction.

作者信息

Klahn Emil A, Thiel Andreas M, Degn Rasmus B, Kibalin Iurii, Gukassov Arsen, Wilson Claire, Canaj Angelos B, Murrie Mark, Overgaard Jacob

机构信息

Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark.

Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, 91191 Gif-sur-Yvette, France.

出版信息

Dalton Trans. 2021 Oct 19;50(40):14207-14215. doi: 10.1039/d1dt01959g.

DOI:10.1039/d1dt01959g
PMID:34550149
Abstract

We present the magnetic anisotropy of two isostructural pentagonal-bipyramidal complexes, [Ln(HO)(HMPA)]I·2HMPA (HMPA = hexamethylphosphoramide, Ln = Dy, Ho). Using ac magnetic susceptibility measurements, we find magnetic relaxation barriers of 600 K and 270 K for the Dy- and Ho-compounds, respectively. This difference is supported by polarized neutron diffraction (PND) measured at 5 K and 1 T which provides the first experimental evidence that the transverse elements in the magnetic anisotropy of the Ho-analogue are significant, whereas the Dy-analogue has a near-axial magnetic anisotropy with vanishing transverse contributions. The coordination geometries of the two complexes are highly similar, and we attribute the loss of strong magnetic axiality as expressed in the atomic susceptibility tensors from PND, as well as the smaller relaxation barrier in the Ho-complex compared to the Dy-complex, to the less favorable interaction of the pentagonal bipyramidal crystal field with the characteristics of the Ho(III) 4f-charge distribution.

摘要

我们展示了两种同构的五角双锥配合物[Ln(HO)(HMPA)]I·2HMPA（HMPA = 六甲基磷酰胺，Ln = Dy、Ho）的磁各向异性。通过交流磁化率测量，我们分别发现Dy化合物和Ho化合物的磁弛豫势垒为600 K和270 K。在5 K和1 T下进行的极化中子衍射（PND）测量支持了这种差异，该测量提供了首个实验证据，表明Ho类似物磁各向异性中的横向元素很显著，而Dy类似物具有近乎轴向的磁各向异性，横向贡献可忽略不计。这两种配合物的配位几何结构高度相似，我们将PND中原子磁化率张量所表现出的强磁轴向性的丧失，以及Ho配合物与Dy配合物相比更小的弛豫势垒，归因于五角双锥晶体场与Ho(III) 4f电荷分布特征之间不太有利的相互作用。

相似文献

1
Magnetic anisotropies of Ho(III) and Dy(III) single-molecule magnets experimentally determined polarized neutron diffraction.通过极化中子衍射实验测定的Ho(III)和Dy(III)单分子磁体的磁各向异性。
Dalton Trans. 2021 Oct 19;50(40):14207-14215. doi: 10.1039/d1dt01959g.
2
Enhancing the energy barrier by replacing the counterions in two holmium(iii)-pentagonal bipyramidal single-ion magnets.通过替换两种钬（III）-五角双锥单离子磁体中的抗衡离子来提高能垒。
Dalton Trans. 2020 May 28;49(20):6703-6709. doi: 10.1039/d0dt00905a. Epub 2020 May 5.
3
Chemical and in silico tuning of the magnetisation reversal barrier in pentagonal bipyramidal Dy(iii) single-ion magnets.五配位双锥型 Dy(iii)单离子磁体中磁化反转势垒的化学和计算调控。
Chem Commun (Camb). 2018 Jul 19;54(59):8273-8276. doi: 10.1039/c8cc03929a.
4
A new air- and moisture-stable pentagonal-bipyramidal Dy single-ion magnet based on the HMPA ligand.一种基于 HMPA 配体的新型空气稳定、水分稳定的五配位 Dy 单离子磁体。
Dalton Trans. 2019 Feb 5;48(6):2213-2219. doi: 10.1039/c8dt03565b.
5
Mapping the Magnetic Anisotropy at the Atomic Scale in Dysprosium Single-Molecule Magnets.在镝单分子磁体中原子尺度的各向异性磁图谱。
Chemistry. 2018 Nov 7;24(62):16576-16581. doi: 10.1002/chem.201803300. Epub 2018 Oct 5.
6
Unravelling the role of spin-vibrational coupling in designing high-performance pentagonal bipyramidal Dy(iii) single ion magnets.揭示自旋-振动耦合在设计高性能五角双锥Dy(iii)单离子磁体中的作用。
Chem Sci. 2024 Mar 22;15(17):6465-6477. doi: 10.1039/d4sc00823e. eCollection 2024 May 1.
7
Syntheses, structures, and magnetic properties of acetato- and diphenolato-bridged 3d-4f binuclear complexes [M(3-MeOsaltn)(MeOH)x(ac)Ln(hfac)2] (M = Zn(II), Cu(II), Ni(II), Co(II); Ln = La(III), Gd(III), Tb(III), Dy(III); 3-MeOsaltn = N,N'-bis(3-methoxy-2-oxybenzylidene)-1,3-propanediaminato; ac = acetato; hfac = hexafluoroacetylacetonato; x = 0 or 1).合成、结构和磁性质的乙酸根和二酚桥联 3d-4f 双核配合物[M(3-MeOsaltn)(MeOH)x(ac)Ln(hfac)2]（M = Zn(II)，Cu(II)，Ni(II)，Co(II)；Ln = La(III)，Gd(III)，Tb(III)，Dy(III)；3-MeOsaltn = N,N'-双(3-甲氧基-2-氧基亚苄基)-1,3-丙二胺；ac = 乙酸根；hfac = 六氟乙酰丙酮根；x = 0 或 1）。
Inorg Chem. 2013 May 20;52(10):6160-78. doi: 10.1021/ic400594u. Epub 2013 May 6.
8
Asymmetric Dinuclear Lanthanide(III) Complexes from the Use of a Ligand Derived from 2-Acetylpyridine and Picolinoylhydrazide: Synthetic, Structural and Magnetic Studies.手性双核镧系（III）配合物的合成、结构和磁性研究：来自 2-乙酰吡啶和吡啶甲酰肼的配体的应用。
Molecules. 2020 Jul 10;25(14):3153. doi: 10.3390/molecules25143153.
9
Effects of strong coordination bonds at the axial or equatorial positions on magnetic relaxation for pentagonal bipyramidal dysprosium(III) single-ion magnets.五角双锥镝（III）单离子磁体中轴向或赤道位置的强配位键对磁弛豫的影响。
Dalton Trans. 2022 Nov 15;51(44):16964-16972. doi: 10.1039/d2dt02402k.
10
Heterometallic MLn (M = Co/Zn; Ln = Dy/Y) Complexes with Pentagonal Bipyramidal 3d Centers: Syntheses, Structures, and Magnetic Properties.具有五角双锥3d中心的异金属MLn（M = Co/Zn；Ln = Dy/Y）配合物：合成、结构及磁性
Inorg Chem. 2018 Dec 17;57(24):15526-15536. doi: 10.1021/acs.inorgchem.8b02875. Epub 2018 Nov 30.

引用本文的文献

1
Experimental determination of the magnetic anisotropy in five-coordinated Co(ii) field-induced single molecule magnets.五配位钴（II）场诱导单分子磁体中磁各向异性的实验测定
Chem Sci. 2025 Aug 12. doi: 10.1039/d5sc03103f.
2
Multi-Technique Experimental Benchmarking of the Local Magnetic Anisotropy of a Cobalt(II) Single-Ion Magnet.钴（II）单离子磁体局部磁各向异性的多技术实验基准测试
JACS Au. 2023 Jan 23;3(2):429-440. doi: 10.1021/jacsau.2c00575. eCollection 2023 Feb 27.