A hard molecular nanomagnet from confined paramagnetic 3d-4f spins inside a fullerene cage.
A hard molecular nanomagnet from confined paramagnetic 3d-4f spins inside a fullerene cage.
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DOI：
10.1038/s41467-023-44194-y
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发表时间：
2023-12-19
影响因子：
16.6
通讯作者：
Gao, Song
中科院分区：
文献类型：
--
作者：
Huang, Chenli;Sun, Rong;Bao, Lipiao;Tian, Xinyue;Pan, Changwang;Li, Mengyang;Shen, Wangqiang;Guo, Kun;Wang, Bingwu;Lu, Xing;Gao, Song
减小自旋间距离可以增强磁相互作用，并允许实现出色的磁性。然而，实现缩短距离在技术上具有挑战性。在这里，我们构建一个3d-4f金属簇（Dy 2 VN）内的C80笼，提供一个迄今未见的金属富勒烯含有顺磁性3d和4f金属离子。通过对Dy2VN@Ih（7）-C80的晶体学和理论分析，观察到由于独特的笼限制效应，3d-4f（Dy-V）距离被显著抑制。这些减小的距离导致增强的磁耦合（Jtotal，Dy-V = 53.30 cm−1; Jtotal，Dy-Dy = −6.25 cm−1），导致与报道的3d-4f单分子磁体相比的高磁阻挡温度和2.73特斯拉的强矫顽场。我们的工作提出了一类新的单分子磁体，其中顺磁性3d和4f金属被限制在富勒烯笼中，由于独特的笼限制效应和所捕获的磁芯的不同组成而提供上级和可调谐的磁性能。缩短自旋间距是增强磁耦合的有效途径。然而，在大多数磁系统中改变离子间距离通常是具有挑战性的。在这里，Huang等人提出了一种增强磁相互作用的策略，通过将分子磁性系统限制在碳富勒烯笼内，从而增强磁性。
Reducing inter-spin distance can enhance magnetic interactions and allow for the realization of outstanding magnetic properties. However, achieving reduced distances is technically challenging. Here, we construct a 3d-4f metal cluster (Dy2VN) inside a C80 cage, affording a heretofore unseen metallofullerene containing both paramagnetic 3d and 4f metal ions. The significantly suppressed 3d-4f (Dy-V) distances, due to the unique cage confinement effect, were observed by crystallographic and theoretical analysis of Dy2VN@Ih(7)-C80. These reduced distances result in an enhanced magnetic coupling (Jtotal, Dy-V = 53.30 cm−1; Jtotal, Dy-Dy = −6.25 cm−1), leading to a high magnetic blocking temperature compared to reported 3d-4f single-molecule magnets and strong coercive field of 2.73 Tesla. Our work presents a new class of single-molecule magnets with both paramagnetic 3d and 4f metals confined in a fullerene cage, offering superior and tunable magnetic properties due to the unique cage confinement effect and the diverse composition of the entrapped magnetic core. Shortening the inter-spin distance is an effective way to enhance magnetic coupling. However, it is typically challenging to change the inter-ion distance in most magnetic systems. Here, Huang et al present a strategy for enhancing magnetic interactions, by confining a molecular magnetic system inside a carbon fullerene cage, leading to enhanced magnetic properties.
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影响因子：
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作者：
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通讯作者：
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通讯作者：
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作者：
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