Thermal Fragmentation of C<SUB>60</SUB> in Argon Gas
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概要
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Thermal decomposition of C<SUB>60</SUB> 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 C<SUB>60</SUB> of cubic system were detected in the samples heated below 500°C. With the increase of temperature, these peaks of C<SUB>60</SUB> 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 C<SUB>22</SUB> and C<SUB>48</SUB> were produced by heating C<SUB>60</SUB> at 600°C, though not resolved C<SUB>60</SUB> remained. The decomposition of C<SUB>60</SUB> advanced with the increase of temperature. At 1000°C, it was found that C<SUB>60</SUB> was decomposed into five molecules, such as C<SUB>9</SUB>, C<SUB>22</SUB>, C<SUB>25</SUB>, C<SUB>35</SUB> and C<SUB>48</SUB>.
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