Research Article


2021, 14(12): 4658–4663


Covalently bonded two spin centers of paramagnetic metallofullerene dimer

Haibing Meng§, Yongqiang Chai§, Chong Zhao, Mingzhe Nie, Chunru Wang, and Taishan Wang (✉)

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Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing 100190, China
§ Haibing Meng and Yongqiang Chai contributed equally to this work.

Keywords: metallofullerene, dimer, electron spin, hyperfine couplings, paramagnetic property
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  • Abstract
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Paramagnetic endohedral metallofullerenes with well protected unpaired spin have potential applications in molecular-scale qubit processing and magnetoreception system. In this study, a paramagnetic metallofullerene Sc3C2@C80 dimer with covalently bonded two spin centers was synthesized. Electron paramagnetic resonance (EPR) results further revealed the varied spin-nuclei couplings and paramagnetic property for Sc3C2@C80 dimer. Briefly, the Sc3C2@C80 dimer in toluene solution shows EPR hyperfine splittings originating from the spin-Sc couplings. However, the Sc3C2@C80 dimer in solid state shows the disappearance of hyperfine structure and a single EPR signal caused by its two-spin-center structure. The transformation of EPR signals can be further finely modulated by controlling the dynamic motion of Sc3C2@C80 dimer in chloronaphthalene. The Sc3C2@C80 dimer with two spin centers possesses varied paramagnetic properties, demonstrating its potential as new magnetic material.
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Covalently bonded two spin centers of paramagnetic metallofullerene dimer. Nano Res. 2021, 14(12): 4658–4663

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