The Infrared and Ultraviolet Absorption Spectra of Laboratory-produced

The infrared and ultraviolet absorption spectra of laboratory-produced carbon dust evidence for the presence of the 50 molecule 

In carbon smoke samples prepared from vaporized graphite at elevated quenching gas pressures (e.g. 100 Torr He) new absorption features have been observed in the infrared (the strongest at 1429, 1183, 577, and 528 cm ). Broader features also have been observed in the ultraviolet (the strongest at 340, 270, and 220 nm). By studying C-enriched samples we have shown that the infrared absorptions are produced by large, pure carbon molecules. The evidence supports the idea that the features are produced by the icosahedral molecule. 

We have recently reported the discovery of four strong lines in the infrared and three broader features in the near ultraviolet, observed in absorption spectra of laboratory-produced carbon smoke [9]. The infrared lines have also been noticed by other investigators [10], The aim of this communication is to report new spectroscopic results on isotopically modified samples which support the idea that the reported features in fact originate from a pure and massive carbon molecule which very likely is the soccer-ball-shaped Cm molecule. 

The spectra from carbon dust obtained from natural carbon (about 99% C) are shown in fig. 1. At pressures of about 10 Torr, the infrared spectra consist of a featureless background which steadily rises towards shorter wavelengths. Broad humps at 1600-1200 cm and 900-500 cm are superimposed on this rise. These humps originate from stretching and 

The infrared line positions (rounded to full wavenumbers) and integrated strength of lines which show similar frequency ratios in and C dust samples. For the u aker features, this list is not complete 

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Kratschmer W, Fostiropoulos K, Huffman DR (1990) The infrared and ultraviolet absorption spectra of laboratory-produced carbon dust evidence for the presence of the Cgo molecule. Chem Phys Lett 170 167-170... 

Kr90a W. Kratschmer, K. Fostiropoulos and D. R. St84 Huffman, The Infrared and Ultraviolet Absorption Spectra of Laboratory-Produced Carbon Dust Evidence for the Presence of the Ceo Molecule, Chem. Phys. Lett. 170, 167-170 (1990). Ta90 ... 

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