Photolysis and radiolysis of cyclopentane in the liquid phase

Subpicosecond transient absorption study of the UV two-photon excitation of liquid alkanes

“…59 For trans-decalin, 72 ( 5 ps) appears too small to be explained by geminate electron-ion pair recombination in this low-mobility liquid (7gi estimate for cis-declain: 10-1 5 ps). 19.42 In view of the large uncertainty in the determination of 72, it is, however, not clear if this difference is really significant.…”

Radiation Chemistry of Organic Liquids: Saturated Hydrocarbons

“…0.01 at 7 eV photoexcitation [92]. For cyclohexane (and most of other saturated hydrocarbons), this quantum yield rapidly decreases with the excitation energy (to 3.5x10 -3 at 8.4 eV, the onset of photoionization) [60,82,92,94]. All of the hydrocarbon S 1…”

“…Termolecular reactions analogous to reaction (15) were observed in the gas phase, e.g., for c-C 6 H 12 ^+ and water [60].…”

“…For cycloalkanes, the main photoreaction is reaction (3). For radical cations of methyl-branched alkanes, the loss of CH 4 was also observed, while the radical cations of linear alkanes prefer to fragment to 2-butene^+ and the residual paraffin [60]. Thus, even the lower excited states of some radical cations are dissociative.…”

“…In cyclohexane and decalins, reaction (1) is endothermic by 0.1-0.4 eV [60] and it seems reasonable that the excitation of the hole may facilitate the proton transfer. Fragmentation of matrix-isolated hydrocarbon radical cations upon excitation with 2-4 eV photons was observed by EPR (see review [61]).…”