Role of ultrafast dissociation in the fragmentation of chlorinated methanes
Kokkonen, E.; Jänkälä, K.; Patanen, M.; Cao, W.; Hrast, M.; Bučar, K.; Žitnik, M.; Huttula, M. (2018-05-01)
Kokkonen, E., Jänkälä, K., Patanen, M., Cao, W., Hrast, M., Bučar, K., Žitnik, M., Huttula, M. (2018) Role of ultrafast dissociation in the fragmentation of chlorinated methanes. Journal of Chemical Physics, 148 (17), 174301. doi:10.1063/1.5026720
© 2018 The Authors. Published by AIP Publishing.
Photon-induced fragmentation of a full set of chlorinated methanes (CH₃Cl, CH₂Cl₂, CHCl₃, CCl₄) has been investigated both experimentally and computationally. Using synchrotron radiation and electron-ion coincidence measurements, the dissociation processes were studied after chlorine 2p electron excitation. Experimental evidence for CH₃Cl and CH₂Cl₂ contains unique features suggesting that fast dissociation processes take place. By contrast, CHCl₃ and CCl₄ molecules do not contain the same features, hinting that they experience alternative mechanisms for dissociation and charge migration. Computational work indicates differing rates of charge movement after the core-excitation, which can be used to explain the differences observed experimentally.
- Avoin saatavuus