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The role of out-of-plane deformations in subpicosecond internal conversion of photoexcited purine bases: Absence of the ultrafast decay channel in propanodeoxyguanosine

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.cplett.2007.04.017
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Affiliation
  1. National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
FormatText, Article
Abstract
It is shown that photoexcited propanodeoxyguanosine (PdG), in which out-of-plane deformation of the six-membered ring of the guanine moiety is hindered, does not exhibit the subpicosecond internal conversion characteristic of the naturally occurring purine bases. The result supports the theoretical conclusion that the ultrafast internal conversion occurs via the conical intersection of the electronic ground state with the biradical state, which either evolves from [pi][pi]* state for large out-of-plane deformation or crosses the [pi][pi]* state at higher energy.
Publication date
In
  • Chemical Physics Letters 440, no. 1-3 (25 May 2007): 145–149.
LanguageEnglish
Peer reviewedYes
NPARC number12339327
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Record identifier2cfd5423-7900-435d-bda6-66052e0da4fc
Record created2009-09-11
Record modified2023-06-23
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