Infrared study of vibrational property and polymerization of fullerene C60 and C70 under pressure

Infrared spectroscopy on the rotor–stator compounds C60–C8H8 and C70–C8H8 under pressure

“…Since only weak van der Waals interaction between the molecules is present, the characteristic vibrational modes of the fullerene molecules can be observed in the infrared spectra of C 60 -C 8 H 8 and C 70 -C 8 H 8 without any frequency shift compared to pure C 60 and C 70 , together with the three characteristic modes of cubane [5][6][7][8]. A few selected vibrational modes in the infrared absorbance spectra of C 60 -C 8 H 8 and C 70 -C 8 H 8 for different pressures are shown in Fig.…”

Infrared spectroscopy on the fullerene C70 under pressure

“…The pressure-dependent infrared study on mixtures of C 60 and C 70 found no discontinuous change apart from the splitting of a vibrational mode at 535 cm −1 [16]. Further- more, infrared measurements on pure C 70 found no discontinuous change in the pressure dependence of the vibrational modes [17]. Thus, various pressure-dependent spectroscopic measurements exhibit discrepancies in the reported anomalies.…”

Terrestrial and Extraterrestrial Fullerenes

“…Elemental carbon, including fullerenes, can react with impact-molten silicates to form CO and CO 2 that escape from the Moon, one explanation for the surprisingly small carbon contents of lunar fines and rocks. [75][76][77][78] Also, fullerenes can become destroyed on the Moon by thermal decomposition, [79][80][81] destruction by electrons and ions from the solar wind and cosmic rays [82][83][84][85][86] and become photo-or pressure-polymerized [87,88] in the harsh environment of the lunar regolith. Fullerene multimers, because of their very low solubilities in organic solvents, are very hard to detect.…”