Picosecond transient infrared study of the ultrafast deactivation processes of electronically excited B-DNA and Z-DNA forms of [poly(dG-dC)]2

Gerard W. Doorley, David A. McGovern, Michael W. George, Michael Towrie, Anthony W. Parker, John M. Kelly, Susan J. Quinn

Research output: Journal PublicationArticlepeer-review

40 Citations (Scopus)

Abstract

(Graph Presented) Very fast: UV excitation of the right-handed B form or the left-handed Z form of [poly(dG-dC)]2 results in transient IR absorption bands that remain long after the 1ππ* state is predicted to have decayed (see picture). A biexponential decay is observed for B-DNA, which is assigned to the vibrationally excited ground state and the 1nNπ* state. The decay of Z-DNA is dominated by single-exponential decay, which is assigned to an exciplex state.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalAngewandte Chemie - International Edition
Volume48
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes

Keywords

  • DNA
  • IR spectroscopy
  • Nucleotides
  • Time-resolved spectroscopy
  • Ultrafast processes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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