Article Dans Une Revue Synthetic Metals Année : 1993

C60 doped with organic cations: Magnetic resonance measurements

Résumé

"Doped" C60 compounds were synthesized by the electrochemical reduction. We stabilize the reduced state of the fullerene using two organic cations of a different size: N-methyl-N-ethyl-morpholine+ and acridizine+. The products of these two reactions precipitated as a powder on the platinum electrode and in the solution. The electrical conductivity of pressed pellets was below 10-8 S/cm for both compounds. We employed the Electron Paramagnetic Resonance and 13C Nuclear Magnetic Resonance measurements as the first characterization of these materials. The samples showed an ERP signal with the line width of 0.5 mT, which is due to the radical anion C60·-. We used broadband and Magic Angle Spinning techniques to obtain the 13C NMR spectra. The main line in the most of these spectra is the single line of the radical anion of the C60 at about 142 ppm. This line appears approximately at the same position as in the pure C60 but it is broader. It suggests that the reorientation of fullerene molecules is disturbed already at room temperature.

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hal-04944390 , version 1 (18-03-2025)

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R. Zuzok, P. Wzietek, M. Fourmigue, P. Batail, P. Auban-Senzier, et al.. C60 doped with organic cations: Magnetic resonance measurements. Synthetic Metals, 1993, 56 (2-3), pp.3235-3239. ⟨10.1016/0379-6779(93)90108-9⟩. ⟨hal-04944390⟩
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