Exploring the structural variations and magnetic properties of three hexanuclear dysprosium(III) complexes exhibiting single-molecule magnetism behavior

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2024-08-17 DOI:10.1016/j.poly.2024.117189

Ting-Hung Chu , Wen-Qi Zeng , Li-Wei Cheng , Jason D. Braun , David E. Herbert , Po-Heng Lin

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Abstract

Three novel hexanuclear Dy^III complexes supported by polyhydroxy Schiff-base ligands, [Dy₆(hmc)₃(μ-acac)₂(acac)₃(μ₃-OH)₄(H₂O)₂]·2MeCN (1·2MeCN), [Dy₆K₂(hmc)₃(μ-CO₃)₆(μ₃-CO₃)₄(H₂O)₂]·8MeOH (2·8MeOH) and [Dy₆(hmc)₃(μ-OAc)₆(μ₃-OH)₃(H₂O)₃] (3) (H₃hmc: 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonhydrazide), have been prepared and structurally characterized by single-crystal X-ray diffraction, elemental analysis, and IR spectroscopy. Each of the hexanuclear complexes is constructed from triangular Dy₃ building blocks, with the six Dy^III ions are arranged in three different conformations. The magnetic properties of three dinuclear Dy^III complexes have also been investigated (Fig. S2). The frequency-dependent ac susceptibility is indicative of Single-Molecule Magnet behavior without and/or with optimum dc field for complexes 2 and 3.

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探索三种六核镝(III)配合物的结构变化和磁性能，展示单分子磁学行为

由多羟基席夫碱配体支持的三种新型六核 DyIII 配合物，即 [Dy6(hmc)3(μ-acac)2(acac)3(μ3-OH)4(H2O)2]-2MeCN（1-2MeCN）、[Dy6K2(hmc)3(μ-CO3)6(μ3-CO3)4(H2O)2]-8MeOH（2-8MeOH）和[Dy6(hmc)3(μ-OAc)6(μ3-OH)3(H2O)3] (3) (H3hmc：制备了 1,5-双（2-羟基-3-甲氧基亚苄基）碳肼，并通过单晶 X 射线衍射、元素分析和红外光谱对其结构进行了表征。每个六核配合物都由三角形的 Dy3 构建块构成，六个 DyIII 离子以三种不同的构象排列。我们还研究了三种双核 DyIII 复合物的磁性（图 S2）。对于复合物 2 和 3，随频率变化的交流磁感应强度表明它们在没有和/或没有最佳直流电场的情况下具有单分子磁性。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.