Radiation-induced degradation of alkane molecules in solid rare gas matrices

Ion-molecule reactions of primary radical cations in the liquid-phase radiolysis of n-alkanes: An EPR study

“…In radiolysis, the radical cations of alkanes are formed with a noticeable excess of energy, which is favorable for fragmentation and rearrangements. The rapid unimolecular degradation of the primary radical cations of n-alkanes was detected in the radiolysis of n-heptane and pentane [23,24] in an argon matrix at 15 K. In this case, the formation of the methyl radical and vinyl olefins (according to IR-spectroscopic data) or the formation of methane in a pair with an alkene radical cation in a parallel process was observed. This fragmentation was due to an excess of …”

Electron-driven chemistry of halogenated compounds in condensed phases: Effects of solvent matrices on reaction dynamics and kinetics

“…Further annealing of the CF x Cl y film to approximately 560 K results in thermal dissociation of the C-Cl and C-F bonds to leave a predominantly graphitic overlayer, evidenced by the dominance of a single peak at $285 eV in the C 1s region and ( figure 14(v)). Other studies show that carbon-coupling reactions also occur in hydrocarbon films under the influence of ionizing radiation [125,126]. Nakayama the low-energy electron-induced production of neutral species from CF 2 Cl 2 films.…”

“…Post-irradiation TPD was used to detect various C 2 (C 2 F y Cl z ) type species. In another example, Feldman et al [125] investigated the effect of radiation-induced degradation of heptanes using IR spectroscopy. Numerous hydrocarbon degradation products were observed by IR including methane, vinyl-and trans-vinylene-type olefins.…”

The radiation-induced chemistry in solid xenon matrices

“…An overall efficiency of the total radiation-induced degradation of isolated molecules in a solid xenon matrix was estimated from IR spectroscopic studies of the samples irradiated with fast electrons [13,15]. According to these data, the radiation-chemical yields of consumption of guest species were found to be between 1 and 2.5 molecules per 100 eV of energy absorbed by the matrix.…”

“…However, the mechanistic aspects were not studied in detail. During the past fifteen years we performed systematic studies of the effects of high-energy radiation on organic molecules isolated in different noble-gas hosts using a combination of IR and EPR spectroscopy [13][14][15][16][17][18][19][20][21][22]. These experiments provided quantitative estimates for overall efficiency of the radiation-induced degradation of guest molecules in terms of radiation-chemical yields and made it possible to propose a general formal scheme of chemical transformations:…”