Modulating magnetic anisotropy in linear tetranuclear dysprosium(iii) complexes via coordinated anions†

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Dalton Transactions Pub Date : 2024-10-22 DOI:10.1039/D4DT01949K

Guan-Lin Lu, Shih-Ting Chiu, Po-Heng Lin and Jérôme Long

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Abstract

We report the synthesis, structures, and magnetic properties of two novel linear tetranuclear complexes with the general formula [Dy₄(Hheb)₂(heb)₄X₂(MeOH)₄] (X⁻ = NO₃⁻, OAc⁻; H₂heb = (E)-N′-(1-(2-hydroxyphenyl)ethylidene)benzohydrazide, OAc⁻ = acetate). The rigid ligands (Hheb⁻/heb²⁻) incorporate phenoxide groups and bridge the Dy³⁺ ions in an unusual tetranuclear linear assembly. Notably, we demonstrate through magnetic measurements and theoretical calculations how the anion (X) coordinated at the peripheral Dy³⁺ centers acts as a switch, significantly changing the magnetic anisotropy of the entire complex. This control over magnetic anisotropy through the selection of the coordinated anion offers a promising avenue for tailoring the functionality of single-molecule magnets.

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通过配位阴离子调节线性四核镝(III)配合物的磁各向异性

我们报告了通式为 [Dy₄(Hheb)2(heb)4X₂(MeOH)₄]（X- = NO₃-, OAc-；H2heb = (E)-N'-(1-(2-hydroxyphenyl)ethylidene)benzohydraz, OAc- = 乙酸酯）的两种新型线性四核配合物的合成、结构和磁性。刚性配体（Hheb-/heb2-）包含氧化苯基团，并以不寻常的四核线性组装方式连接 Dy³⁺ 离子。值得注意的是，我们通过磁性测量和理论计算证明了配位阴离子 (X) 在外围 Dy³⁺ 中心的配位是如何起开关作用的，从而显著改变了整个复合物的磁各向异性。这种通过选择配位阴离子来控制磁各向异性的方法为定制单分子磁体的功能提供了一条很有前景的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.