Chiral two-dimensional conjugated metal-organic frameworks with high spin polarization

Shiyi Feng, Yang Lu (), Chenchen Wang, Morteza Torabi, Xing Huang, Florian Auras, Ran He, Lukas Sporrer, Paul-Alexander Laval-Schmidt, Xizheng Wu, Xia Wang, Li Wan, Dongxu Wang, Bernd Plietker, Mike Hambsch, Markus Löffler, Stefan C. B. Mannsfeld, Claudia Felser and Xinliang Feng ()
Additional contact information
Shiyi Feng: Technische Universität Dresden
Yang Lu: Technische Universität Dresden
Chenchen Wang: Technische Universität Dresden
Morteza Torabi: Technische Universität Dresden
Xing Huang: Technische Universität Dresden
Florian Auras: Technische Universität Dresden
Ran He: (IFW-Dresden)
Lukas Sporrer: Technische Universität Dresden
Paul-Alexander Laval-Schmidt: Technische Universität Dresden
Xizheng Wu: Max Planck Institute for Chemical Physics of Solids
Xia Wang: Max Planck Institute for Chemical Physics of Solids
Li Wan: Max Planck Institute of Microstructure Physics
Dongxu Wang: Max Planck Institute of Microstructure Physics
Bernd Plietker: Technische Universität Dresden
Mike Hambsch: Technische Universität Dresden
Markus Löffler: Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden
Stefan C. B. Mannsfeld: Technische Universität Dresden
Claudia Felser: Max Planck Institute for Chemical Physics of Solids
Xinliang Feng: Technische Universität Dresden

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Two-dimensional conjugated metal-organic frameworks have garnered significant research interest as emerging candidates for organic 2D crystal materials. In classical 2D crystals, chirality can give rise to unique physical phenomena; however, the precise implantation of chirality into 2D c-MOFs has yet to be demonstrated. Here, we demonstrate an example of chiral 2D c-MOFs obtained through the side chain-induced chirality amplification strategy to achieve tunable chiral expression, enabling notable chirality amplification. Chiral substitutions induce distortions in the 2,3,7,8,12,13-hexaiminotriindole conjugated ligand along distinct orientations, effectively transferring their chirality to the conjugated backbone. The resulting frameworks exhibit tunable chirality through steric control, where chiral naphthylethyl substitution increases the distortion angle from 2.3° to 7.0°, leading to pronounced chirality amplification. Furthermore, the chiral 2D c-MOFs demonstrate exceptional spin polarization measured by magnetic-conductive atomic force microscopy (mc-AFM), achieving a value as high as 96.9%, placing them among the highest-performing materials reported to date. This work opens new avenues for the design of chiral 2D crystal materials with potential applications in chiral spintronics.

Date: 2025
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DOI: 10.1038/s41467-025-64969-9

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