Characterization of the soluble all-carbon molecules C60 and C70

TLDR: In this paper, the physical and chemical characterization of two new molecular forms of carbon, C{sub 60} and C {sub 70} were reported. But the results demonstrate a high yield of production (14%) under optimized conditions and reveal only C{ sub 60 and Csub 70 in measurable quantity, in an 85:15 ratio.

Abstract: The authors report on the further physical and chemical characterization of the new forms of molecular carbon, C{sub 60} and C{sub 70}. Results demonstrate a high yield of production (14%) under optimized conditions and reveal only C{sub 60} and C{sub 70} in measurable quantity, in an 85:15 ratio. These two new molecular forms of carbon can be completely separated in analytical amounts by column chromatography on alumina. Comparison among mass spectra obtained by the electron impact, laser desorption, and fast atom bombardment (FAB) methods allows a clear assessment of the composition of the mixed and pure samples, and of the fragmentation and double ionization patterns of the molecules. In addition, spectroscopic analyses are reported for the crude mixture by {sup 13}C NMR and by IR spectroscopy in KBr pellet, and for pure C{sub 60} and C{sub 70} in solution by UV-vis spectroscopy.