アルゴン中におけるC₆₀の熱分解

抄録

Thermal decomposition of C₆₀ was studied by x-ray diffraction and time-of-flight mass spectroscopy, which was carried out in a high-purity argon gas for 3h at the temperature ranging from 500 to 1000°C. The diffraction peaks corresponding to C₆₀ of cubic system were detected in the samples heated below 500°C. With the increase of temperature, these peaks of C₆₀ were broadened, and the diffraction peaks corresponding to chaoite of hexagonal system were detected. From time-of-flight spectroscopy, it was found that two molecules of C₂₂ and C₄₈ were produced by heating C₆₀ at 600°C, though not resolved C₆₀ remained. The decomposition of C₆₀ advanced with the increase of temperature. At 1000°C, it was found that C₆₀ was decomposed into five molecules, such as C₉, C₂₂, C₂₅, C₃₅ and C₄₈.