Covalently bonded two spin centers of paramagnetic metallofullerene dimer  

作　　者：Haibing Meng Yongqiang Chai Chong Zhao Mingzhe Nie Chunru Wang Taishan Wang 

机构地区：[1]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

出　　处：《Nano Research》2021年第12期4658-4663,共6页纳米研究（英文版）

基　　金：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).

摘　　要：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 Sc_(3)C_(2)@C_(80) 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 Sc_(3)C_(2)@C_(80) dimer. Briefly, the Sc_(3)C_(2)@C_(80) dimer in toluene solution shows EPR hyperfine splittings originating from the spin-Sc couplings. However, the Sc_(3)C_(2)@C_(80) 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 Sc_(3)C_(2)@C80 dimer in chloronaphthalene. The Sc_(3)C_(2)@C_(80) dimer with two spin centers possesses varied paramagnetic properties, demonstrating its potential as new magnetic material.

关 键 词：METALLOFULLERENE DIMER electron spin hyperfine couplings paramagnetic property 

分 类 号：O63[理学—高分子化学]