Structural and electrochemical studies of Sm@D3h-C74 reveal a weak metal-cage interaction and a small band gap species.
A metallofullerene Sm@D3h-C74 that contains a divalent rare-earth metal has been studied structurally and electrochemically. The crystallographic analysis revealed that the endohedral Sm atom is more or less motional rather than being localized at a site where the pyracylene motif is nearby. This suggests a weaker metal-pyracylene interaction in Sm@D3h-C74 relative to that in M(II)@C74 (M = Group II metal), thus confirming the importance of the metal variety. The electrochemical studies showed a major difference between the redox properties of Sm@D3h-C74 and other Sm-fullerenes and indicated a small band gap for the title compound.
Beijing National Laboratory for Molecular Sciences, State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China. zjshi@pku.edu.cn.
Wei
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Xu
Yajuan
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Hao
Filip
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Uhlik
Zujin
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Shi
Zdenêk
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Slanina
Lai
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Feng