Chemical Physics Letters, Vol.424, No.4-6, 364-368, 2006
Fragmentation of hydrated thymine clusters in the gas phase by the interaction with UV photons
Fragmentation of hydrated thymine clusters in the gas phase induced by a UV laser pulse at 266 nm was studied by means of time-of-flight mass spectrometry. The range of laser intensity for the interaction of the clusters was from 10(7) to 10(9) W/cm(2). In the laser intensity region of 10(7) 10(8) W/cm(2), the hydrated fragment ions derived from hydrated thymine clusters were detected due to C-C and C-N bond breaks in ring structure of thymine. The fragmentation mechanism of hydrated thymine clusters was inferred from molecular dynamics and molecular orbital simulations for a photoionized hydrated thymine cluster model. (c) 2006 Elsevier B.V. All rights reserved.