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Issue 9, 2016
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Electrochemical reduction of cationic Li+@C60 to neutral Li+@C60˙: isolation and characterisation of endohedral [60]fulleride

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Abstract

Lithium-encapsulated [60]fullerene Li@C60, namely, lithium-ion-encapsulated [60]fullerene radical anion Li+@C60˙, was synthesised by electrochemical reduction of lithium-ion-encapsulated [60]fullerene trifluoromethanesulfonylimide salt [Li+@C60](TFSI). The product was fully characterised by UV-vis-NIR absorption and ESR spectroscopy as well as single-crystal X-ray analysis for the co-crystal with nickel octaethylporphyrin. In solution Li@C60 exists as a monomer form dominantly, while in the crystal state it forms a dimer (Li@C60–Li@C60) through coupling of the C60 radical anion cage. These structural features were supported by DFT calculations at the M06-2X/6-31G(d) level of theory.

Graphical abstract: Electrochemical reduction of cationic Li+@C60 to neutral Li+@C60˙−: isolation and characterisation of endohedral [60]fulleride

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Publication details

The article was received on 17 Mar 2016, accepted on 20 Jun 2016 and first published on 20 Jun 2016


Article type: Edge Article
DOI: 10.1039/C6SC01209D
Citation: Chem. Sci., 2016,7, 5770-5774
  • Open access: Creative Commons BY-NC license
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    Electrochemical reduction of cationic Li+@C60 to neutral Li+@C60˙: isolation and characterisation of endohedral [60]fulleride

    H. Ueno, S. Aoyagi, Y. Yamazaki, K. Ohkubo, N. Ikuma, H. Okada, T. Kato, Y. Matsuo, S. Fukuzumi and K. Kokubo, Chem. Sci., 2016, 7, 5770
    DOI: 10.1039/C6SC01209D

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