近日，中国科学院长春应用化学研究所唐金魁团队研究了Dy（III）基单分子环体的同手性环面自旋态。

单分子环状材料——一种在分子层面兼具自旋特性与手性的材料，在数据存储、手性自旋电子学及磁电设备领域具有广阔应用前景。过去二十年间，通过配体设计与配位化学策略，学界在环状自旋态构筑方面取得了重要进展。然而，实现分子与晶胞尺度同手性磁涡旋结构的精准调控——这是利用匀强磁场诱导环状极化的关键前提——仍面临严峻挑战。

研究组报道了具有对映体纯结构的手性镝三角形配合物，通过引入结构手性成功诱导出自旋手性。μSQUID磁强计分析与从头计算证实其呈现非共面自旋织构，在低温下具有环状基态特征。此外，对于手性与磁化均敏感的磁手性二色光谱分析显示，当温度低于4.5 K时（此时Dy(III)离子间耦合作用有利于环状自旋态的形成），该材料展现出反常的磁光响应行为。

附：英文原文

Title: Homochiral toroidal spin state in Dy(III)-based single-molecule toroics

Author: Zhu, Zhenhua, Ying, Xu, Adi, Langit Cahya, Zhao, Chen, Chew, Elizabeth Jia Mei, Ungur, Liviu, Paul, Sagar, Wernsdorfer, Wolfgang, Train, Cyrille, Rikken, Geert L. J. A., Atzori, Matteo, Tang, Jinkui

Issue&Volume: 2026-02-23

Abstract: Single-molecule toroics, materials that combine spin and chirality at the molecular level, are promising candidates for applications in data storage, chiral spintronics and magnetoelectric devices. Over the past two decades, substantial progress has been made in the design of toroidal spin states via ligand design and coordination chemistry strategies. However, achieving homochiral magnetic vortex configurations across both molecular and unit-cell scales—a key prerequisite to induce the toroidal polarization using a homogeneous magnetic field—remains challenging. Here we report enantiopure chiral dysprosium triangles in which introduction of structural chirality induces spin homochirality. μ-SQUID magnetometry and ab initio calculations evidence a non-coplanar spin texture that exhibits a toroidal ground state at low temperature. Furthermore, magneto-chiral dichroism spectroscopy, a technique sensitive to both chirality and magnetization, reveals unusual behaviours below 4.5K, the temperature at which the coupling between Dy(III) ions favours the generation of a toroidal spin state.

DOI: 10.1038/s41557-026-02070-4

Source: https://www.nature.com/articles/s41557-026-02070-4