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Research Article

Covalently bonded two spin centers of paramagnetic metallofullerene dimer

Haibing Meng§, Yongqiang Chai§, Chong Zhao, Mingzhe Nie, Chunru Wang, Taishan Wang()
Beijing National Laboratory for Molecular Sciences Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of Chemistry, Chinese Academy of SciencesZhongguancun North First Street 2, Beijing 100190 China

§Haibing Meng and Yongqiang Chai contributed equally to this work.

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Abstract

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.

Keywords

metallofullerenedimerelectron spinhyperfine couplingsparamagnetic property

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Nano Research
Volume 14 Issue 12,
December 2021
Pages 4658-4663
DOI: 10.1007/s12274-021-3398-8
Cite this article:
Meng H, Chai Y, Zhao C, et al. Covalently bonded two spin centers of paramagnetic metallofullerene dimer. Nano Research, 2021, 14(12): 4658-4663. https://doi.org/10.1007/s12274-021-3398-8
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