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Highly 13C isotope enriched azafullerene, C59N, for nuclear spin labelling

F. Simon·F. Fulop·A. Rockenbauer·L. Korecz·H. Kuzmany
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Abstract

Synthesis of highly $^{13}$C isotope enriched azafullerene, C$_{59}$N embedded in C$_{60}$ is reported. $^{13}$C enriched fullerenes, produced with the Krätschmer-Huffmann process, were subject to a N$_{2}$ discharge that produces C$_{59}$N with a low probability. Raman spectroscopy indicates a homogeneous $^{13}$C distribution. Electron spin resonance measurement (ESR) proves that the C$_{59}$N concentration, 0.2 %, is similar as in non-enriched fullerenes. The ESR spectrum is simulated accurately with the known $^{14}$N and $^{13}$C hyperfine coupling constants. The material enables the nuclear spin-labelling of heterofullerene complexes with a potential for biological applications. It might also find applications as a building element for quantum computation.

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F. Simon, F. Fulop, A. Rockenbauer, L. Korecz, H. Kuzmany. 2004-11-18. Highly 13C isotope enriched azafullerene, C59N, for nuclear spin labelling. https://doi.org/10.1016/j.cplett.2005.01.056

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