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.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 52022098, 51672281, 51972309, and 51832008). T. Wang particularly thanks the Youth Innovation Promotion Association of CAS (Y201910).
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Meng, H., Chai, Y., Zhao, C. et al. Covalently bonded two spin centers of paramagnetic metallofullerene dimer. Nano Res. 14, 4658–4663 (2021). https://doi.org/10.1007/s12274-021-3398-8
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DOI: https://doi.org/10.1007/s12274-021-3398-8