Seminatural Occurrence of Fullerenes

Abstract

In continuation to our search of fullerenes in usual soots, sixteen additional samples of Chinese ink stick have been analyzed by HPLC. When combined with our previous results, we recognize that &,-content in Chinese ink sticks decreases with time following the first order rate law. This novel observation was interpreted in terms of diffusion-dissipation of C, molecules through the solid stick.

Terrestrial and Extraterrestrial Fullerenes

“…Because fullerenes had been shown to form in flames, a search for C 60 and C 70 in such materials was undertaken by solvent extraction and HPLC. [164,165] The amounts reported were up to 0.1 (weight) %. Two subsequent studies found much less fullerenes (3 ppm at most), which also suggested that the C 60 content of older sticks was less than that of younger sticks.…”