研究人员发现了制造新型金属磁性材料的新工具
Researchers discover new tool to construct novel metal-based magnetic materials

Researchers discover new tool to construct novel metal-based magnetic materials

研究人员发现了制造新型金属磁性材料的新工具

对合成化合物的艺术展示,说明有机自由基之间的蛋糕联系。信贷:经皇家化学学会许可,从无机化学前沿复制, 2020年, 7年, 2592 - 2601年。

加拿大和芬兰的合作导致发现了一种新的磁化合物,其中两个磁性金属离子被两个芳香有机基质结合在一起,形成了一个煎饼纽带。这项研究的结果可用于提高类似化合物的磁性。对这项研究的理论调查是由Jyvskyl大学的研究院研究员Jani O . Moilanen进行的,而实验工作则是在渥太华大学的教授小组中进行的。Muralee Murugesu和Jaclyn L . Brusso 。研究成果于2020年7月在著名的化学期刊《无机化学前沿》上发表,并附有封面艺术。

从移动电话和电脑到医疗成像设备等许多现代电子设备都使用磁铁。除了传统的金属磁铁外,磁力领域目前的研究兴趣之一是研究由金属离子和有机脂质组成的单分子磁铁。单分子磁铁的磁性来自纯分子,有人建议,今后可将单分子磁铁用于高密度信息储存、脊柱电子(脊柱)和量子计算机。

不幸的是,目前已知的大多数单分子磁铁只能在接近绝对零的低温下显示其磁性(? 273c),使其无法用于电子设备。2018年报告了第一个在液氮沸点(196 C)保持磁化的单分子磁铁。这项研究是磁性材料领域的一大突破,因为它表明,在高温下发挥作用的单分子磁铁也是可以实现的。

所报告的化合物在高温下具有极好的磁性,来自化合物的最佳三维结构。理论上,类似的设计原理可用于含有不止一种金属离子的单分子磁铁,但控制多核糖化合物的三维结构要困难得多。

新大院使用了连接有机自由基的办法

本研究没有完全控制所报告化合物的三维结构,而是采用了不同的设计战略。

"与镁离子一样,有机自由基也有可以与未制作的金属离子电子互动的未制作过的电子。因此,有机自由基可与金属离子一起用于控制系统的磁性。特别有意思的有机激进分子是过渡性的,因为他们可以与多种金属离子互动。渥太华大学(University of Ottawa)的穆拉利·穆鲁盖苏(Muralee Murugesu)教授澄清说,我们在研究中采用了这一设计策略,令人惊讶的是,我们合成了一个化合物,其中不仅有一个有机激进分子,而且有两个有机激进分子弥合了两个镁离子,并通过它们的无配对电子形成了一个蛋糕纽带。

"尽管两个激进分子之间形成的蛋糕纽带是众所周知的,但这是在两个金属离子之间首次观察到这种蛋糕纽带。渥太华大学(University of Ottawa)的雅克林· L ·布鲁索(Jaclyn L . Brusso)教授说,有机激进分子之间的互动通常被称为“煎饼纽带” ,因为有机激进分子之间互动的三维结构类似于一堆煎饼。

小说中的蛋糕纽带非常牢固。因此,有机自由基的未熔化电子与镁离子的未熔化电子没有强烈的相互作用,化合物只是在低温下作为一个分子磁铁发挥作用。然而,这项研究为新的多核子单分子磁铁的新设计战略铺平了道路,并启动了进一步的研究。

"计算机化学方法对大院的电子结构和磁性提供了重要的见解,可在今后的研究中使用。通过选择正确的有机自由基,我们不仅可以控制自由基之间的蛋糕纽带的性质,而且可以提高整个化合物的磁性" ,来自Jyvskyl大学的研究院研究员Jani O . Moilanen评论说。

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Jyvskyl大学

A Canadian-Finnish collaboration has led to the discovery of a novel magnetic compound in which two magnetic dysprosium metal ions are bridged by two aromatic organic radicals forming a pancake bond. The results of this study can be utilized to improve the magnetic properties of similar compounds. The theoretical investigation of the study was carried out by the Academy Research Fellow Jani O. Moilanen at the University of Jyvskyl, whereas the experimental work was performed at the University of Ottawa in the groups of Profs. Muralee Murugesu and Jaclyn L. Brusso. The research results were published in the well-recognized chemistry journalInorganic Chemistry Frontiers in July 2020with the cover art.

Magnets are used in many modern electronic devices ranging from mobile phones and computers to medical imaging devices. Besides the traditional metal-based magnets, one of the current research interests in the field of magnetism has been the study of single-molecule magnets consisting of metal ions and organic ligands. The magnetic properties of single-molecule magnets are purely molecular in origin, and it has been proposed that in the future, single-molecule magnets could be utilized in high-density information storage, spin-based electronics (spintronics), and quantum computers.

Unfortunately, most of the currently known single-molecule magnets only exhibit their magnetic properties at low temperatures near absolute zero (?273c), which prevents their utilization in electronic devices. The first single-molecule magnet that retained its magnetization over the boiling point of liquid nitrogen (?196 C) was reported in 2018. This study was a considerable breakthrough in the field of magnetic materials as it demonstrated that single-molecule magnets functioning at higher temperatures can be also realized.

Excellent magnetic properties of the reported compound at the elevated temperatures originated from the optimal three-dimensional structure of the compound. In theory, similar design principles could be used for single-molecule magnets containing more than one metal ion but controlling the three-dimensional structure of multinuclear compounds is much more challenging.

Bridging organic radicals were utilized in the novel compound

Instead of fully controlling the three-dimensional structure of the reported compound, a different design strategy was utilized in this study.

"Like dysprosium ions, organic radicals also have unpaired electrons that can interact with unpaired electrons of metal ions. Thus, organic radicals can be used to control the magnetic properties of a system along with metal ions. Particularly interesting organic radicals are bridging ones as they can interact with multiple metal ions. We employed this design strategy in our study, and surprisingly, we synthesized a compound where not only one but two organic radicals bridged two dysprosium ions as well as formed a pancake bond through their unpaired electrons," Prof. Muralee Murugesu from the University of Ottawa clarifies.

"Even though the formation of the pancake bond between two radicals is well known, this was the first time that the pancake bond was observed between two metal ions. The interaction between organic radicals is often referred to as pancake bonding because the three-dimensional structure of interacting organic radicals resembles a stack of pancakes," Prof. Jaclyn L. Brusso from the University of Ottawa tells.

The pancake bond in the novel compound was very strong. Therefore, the unpaired electrons of the organic radicals did not interact strongly with the unpaired electrons of the dysprosium ions and the compound functioned as a single-molecule magnet only at low temperatures. However, the study paves the way for the new design strategy for novel multinuclear single-molecule magnets and has initiated further research.

"Computational chemistry methods provided important insights into the electronic structure and magnetic properties of the compound that can be utilized in future studies. By choosing the right kind of organic radicals we can not only control the nature of the pancake bond between the radicals but also enhance the magnetic properties of the compound overall," Academy Research Fellow Jani O. Moilanen from the University of Jyvskyl comments.

Artistic presentation of the synthesized compounds illustrating a pancake bond between organic radicals. Credit: Reproduced from Inorganic Chemistry Frontiers., 2020, 7, 2592-2601 with permission from The Royal Society of Chemistry.

对合成化合物的艺术展示,说明有机自由基之间的蛋糕联系。信贷:经皇家化学学会许可,从无机化学前沿复制, 2020年, 7年, 2592 - 2601年。

A Canadian-Finnish collaboration has led to the discovery of a novel magnetic compound in which two magnetic dysprosium metal ions are bridged by two aromatic organic radicals forming a pancake bond. The results of this study can be utilized to improve the magnetic properties of similar compounds. The theoretical investigation of the study was carried out by the Academy Research Fellow Jani O. Moilanen at the University of Jyvskyl, whereas the experimental work was performed at the University of Ottawa in the groups of Profs. Muralee Murugesu and Jaclyn L. Brusso. The research results were published in the well-recognized chemistry journalInorganic Chemistry Frontiers in July 2020with the cover art.

加拿大和芬兰的合作导致发现了一种新的磁化合物,其中两个磁性金属离子被两个芳香有机基质结合在一起,形成了一个煎饼纽带。这项研究的结果可用于提高类似化合物的磁性。对这项研究的理论调查是由Jyvskyl大学的研究院研究员Jani O . Moilanen进行的,而实验工作则是在渥太华大学的教授小组中进行的。Muralee Murugesu和Jaclyn L . Brusso 。研究成果于2020年7月在著名的化学期刊《无机化学前沿》上发表,并附有封面艺术。

Magnets are used in many modern electronic devices ranging from mobile phones and computers to medical imaging devices. Besides the traditional metal-based magnets, one of the current research interests in the field of magnetism has been the study of single-molecule magnets consisting of metal ions and organic ligands. The magnetic properties of single-molecule magnets are purely molecular in origin, and it has been proposed that in the future, single-molecule magnets could be utilized in high-density information storage, spin-based electronics (spintronics), and quantum computers.

从移动电话和电脑到医疗成像设备等许多现代电子设备都使用磁铁。除了传统的金属磁铁外,磁力领域目前的研究兴趣之一是研究由金属离子和有机脂质组成的单分子磁铁。单分子磁铁的磁性来自纯分子,有人建议,今后可将单分子磁铁用于高密度信息储存、脊柱电子(脊柱)和量子计算机。

Unfortunately, most of the currently known single-molecule magnets only exhibit their magnetic properties at low temperatures near absolute zero (?273c), which prevents their utilization in electronic devices. The first single-molecule magnet that retained its magnetization over the boiling point of liquid nitrogen (?196 C) was reported in 2018. This study was a considerable breakthrough in the field of magnetic materials as it demonstrated that single-molecule magnets functioning at higher temperatures can be also realized.

不幸的是,目前已知的大多数单分子磁铁只能在接近绝对零的低温下显示其磁性(? 273c),使其无法用于电子设备。2018年报告了第一个在液氮沸点(196 C)保持磁化的单分子磁铁。这项研究是磁性材料领域的一大突破,因为它表明,在高温下发挥作用的单分子磁铁也是可以实现的。

Excellent magnetic properties of the reported compound at the elevated temperatures originated from the optimal three-dimensional structure of the compound. In theory, similar design principles could be used for single-molecule magnets containing more than one metal ion but controlling the three-dimensional structure of multinuclear compounds is much more challenging.

所报告的化合物在高温下具有极好的磁性,来自化合物的最佳三维结构。理论上,类似的设计原理可用于含有不止一种金属离子的单分子磁铁,但控制多核糖化合物的三维结构要困难得多。

Bridging organic radicals were utilized in the novel compound

新大院使用了连接有机自由基的办法

Instead of fully controlling the three-dimensional structure of the reported compound, a different design strategy was utilized in this study.

本研究没有完全控制所报告化合物的三维结构,而是采用了不同的设计战略。

"Like dysprosium ions, organic radicals also have unpaired electrons that can interact with unpaired electrons of metal ions. Thus, organic radicals can be used to control the magnetic properties of a system along with metal ions. Particularly interesting organic radicals are bridging ones as they can interact with multiple metal ions. We employed this design strategy in our study, and surprisingly, we synthesized a compound where not only one but two organic radicals bridged two dysprosium ions as well as formed a pancake bond through their unpaired electrons," Prof. Muralee Murugesu from the University of Ottawa clarifies.

"与镁离子一样,有机自由基也有可以与未制作的金属离子电子互动的未制作过的电子。因此,有机自由基可与金属离子一起用于控制系统的磁性。特别有意思的有机激进分子是过渡性的,因为他们可以与多种金属离子互动。渥太华大学(University of Ottawa)的穆拉利·穆鲁盖苏(Muralee Murugesu)教授澄清说,我们在研究中采用了这一设计策略,令人惊讶的是,我们合成了一个化合物,其中不仅有一个有机激进分子,而且有两个有机激进分子弥合了两个镁离子,并通过它们的无配对电子形成了一个蛋糕纽带。

"Even though the formation of the pancake bond between two radicals is well known, this was the first time that the pancake bond was observed between two metal ions. The interaction between organic radicals is often referred to as pancake bonding because the three-dimensional structure of interacting organic radicals resembles a stack of pancakes," Prof. Jaclyn L. Brusso from the University of Ottawa tells.

"尽管两个激进分子之间形成的蛋糕纽带是众所周知的,但这是在两个金属离子之间首次观察到这种蛋糕纽带。渥太华大学(University of Ottawa)的雅克林· L ·布鲁索(Jaclyn L . Brusso)教授说,有机激进分子之间的互动通常被称为“煎饼纽带” ,因为有机激进分子之间互动的三维结构类似于一堆煎饼。

The pancake bond in the novel compound was very strong. Therefore, the unpaired electrons of the organic radicals did not interact strongly with the unpaired electrons of the dysprosium ions and the compound functioned as a single-molecule magnet only at low temperatures. However, the study paves the way for the new design strategy for novel multinuclear single-molecule magnets and has initiated further research.

小说中的蛋糕纽带非常牢固。因此,有机自由基的未熔化电子与镁离子的未熔化电子没有强烈的相互作用,化合物只是在低温下作为一个分子磁铁发挥作用。然而,这项研究为新的多核子单分子磁铁的新设计战略铺平了道路,并启动了进一步的研究。

"Computational chemistry methods provided important insights into the electronic structure and magnetic properties of the compound that can be utilized in future studies. By choosing the right kind of organic radicals we can not only control the nature of the pancake bond between the radicals but also enhance the magnetic properties of the compound overall," Academy Research Fellow Jani O. Moilanen from the University of Jyvskyl comments.

"计算机化学方法对大院的电子结构和磁性提供了重要的见解,可在今后的研究中使用。通过选择正确的有机自由基,我们不仅可以控制自由基之间的蛋糕纽带的性质,而且可以提高整个化合物的磁性" ,来自Jyvskyl大学的研究院研究员Jani O . Moilanen评论说。

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Jyvskyl大学