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Journal Article

13C Hyperfine Interaction in the Triplet State of C60: An Electron Spin Echo Envelope Modulation Study. Eds. H. Kuzmany, J. Fink, M. Mehring, S. Roth.

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Pfeuffer, J
Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Grupp, A., Pfeuffer, J., & Mehring, M. (1995). 13C Hyperfine Interaction in the Triplet State of C60: An Electron Spin Echo Envelope Modulation Study. Eds. H. Kuzmany, J. Fink, M. Mehring, S. Roth. World Scientific in: 'Physics and chemistry of fullerenes and derivates', 246-249.

Abstract

The metastable triplet state of C60 molecules in frozen toluene solution was investigated by pulsed EPR after laser flash excitation. The non-icosahedral symmetry of the wavefunction shows up in the triplet finestructure parameters |D|, |E| >0 [1]. 13C hyperfine interaction in isotopically enriched material was measured by one- and two-dimensional ESEEM experiments. The observed modulation patterns are best represented by a model calculation assuming a spin density maximum near the equatorial plane of the molecule with respect to the D5d symmetry axis. As a consequence the D parameter must be positive.