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UV Photophysics of DNA and RNA Nucleotides In Vacuo: Dissociation Channels, Time Scales, and Electronic Spectra

  • J. Mathias Weber
  • Jesse Marcum
  • Steen Brøndsted Nielsen
Chapter
Part of the Physical Chemistry in Action book series (PCIA)

Abstract

This chapter deals with the UV-induced fragmentation of mononucleotide and oligonucleotide ions isolated in vacuo. We review gas-phase photodissociation spectra of mononucleotides, single strands, double strands and quadruplexes, and compare these with the corresponding spectra in solutions to consider solvatochromic shifts. The role of multiple bases is considered within the Frenkel exciton model that describes the electronic coupling between two or more bases, which is relevant to understand photoexcitation. We discuss relaxation of the excited states and the time scales for nucleotide dissociation when there is no solvent quenching of the excess energy. Finally, the photophysical behaviour of DNA with respect to electron ejection will be discussed with an emphasis on the functional groups involved in electron loss.

Keywords

High Occupied Molecular Orbital Electron Detachment Frenkel Exciton Neutral Base Glycosidic Bond Cleavage 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • J. Mathias Weber
    • 1
  • Jesse Marcum
    • 2
  • Steen Brøndsted Nielsen
    • 3
  1. 1.JILA and Department of Chemistry and BiochemistryUniversity of ColoradoBoulderUSA
  2. 2.Department of Chemistry and Food ScienceFramingham State UniversityFraminghamUSA
  3. 3.Department of Physics and AstronomyAarhus UniversityAarhus CDenmark

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