基于杯状[4]芳烃配体的新型单核Dy(III)配合物的合成、结晶组装和慢磁弛豫行为

IF 3.3 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Iuliia V. Strelnikova, Angelina A. Iova, Alexander S. Ovsyannikov, Daut R. Islamov, Igor A. Litvonov, Vladimir A. Lazarenko, Elizaveta S. Kulikova, Artem S. Bogomyakov, Meijin Lin, Airat G. Kiiamov, Svetlana E. Solovieva and Igor S. Antipin
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引用次数: 0

摘要

金属有机单分子磁体,特别是单离子磁体,由于其独特的磁性特性,在计算技术的发展中具有重要的应用价值,越来越受到人们的关注。本文报道了用杯状[4]芳烃配体(2)合成新的单核Dy(III)配合物(2-Dy),该配体下缘附有两个含偶氮苯基的水杨基二胺基团。配体和Dy(III)配合物的结构在结晶相中被彻底表征。配体2的x射线衍射结果显示其形成了左旋和右旋构象的外消旋混合物。当与Dy(III)原子结合时,大环2表现为高度配位配体,完全盖住金属配位球,形成扭曲的三角形十二面体配位球(D2d对称)。在结晶相中,由于弱CH/π相互作用,2-Dy的两个络合对映体对应物堆叠成一维同手性链。磁性能测试表明,在无外部直流场的情况下,所得到的配合物在温度高达10K时表现出缓慢的磁弛豫行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

New mononuclear Dy(iii) complex based on a calix[4]arene ligand with two appended salicylideneamine groups decorated with azophenyl fragments: synthesis, crystalline assembly and slow magnetic relaxation behavior†

New mononuclear Dy(iii) complex based on a calix[4]arene ligand with two appended salicylideneamine groups decorated with azophenyl fragments: synthesis, crystalline assembly and slow magnetic relaxation behavior†

Metal–organic single-molecule magnets (SMMs), especially single-ion magnets (SIMs), attract growing attention due to their unique magnetic behavior, which can be used for the development of computing technologies. Herein, we report the synthesis of a new mononuclear Dy(III) complex (2-Dy) using a calix[4]arene ligand (2), decorated with two lower rim-appended salicylideneamine groups, bearing azophenyl moieties. The structures of both the ligand and Dy(III) complex were thoroughly characterized in the crystalline phase. X-ray diffraction of ligand 2 revealed the formation of a racemic mixture of left-handed and right-handed conformers. Upon binding to the Dy(III) atom, the macrocycle 2 behaves as a highly coordinating ligand by totally capping the metal coordination sphere, leading to the formation of a distorted triangular dodecahedron coordination sphere (D2d symmetry). In the crystalline phase, for 2-Dy, two complex enantiomer counterparts were stacked into 1D homochiral chains due to weak CH/π interactions. Analysis of magnetic properties showed that the obtained complex exhibited slow magnetic relaxation behavior at a temperature up to 10 K in the absence of an external dc field.

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来源期刊
Dalton Transactions
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.
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