Photoinduced electron transfer in a covalent benzo[a] pyrene diol epoxide-2′-deoxyguanosine complex

Leonid Margulis, Pavel F. Pluzhikov, Bing Mao, Vladimir A. Kuzmin, Yong J. Chang, Thomas W. Scott, Nicholas E. Geacintov

Research output: Contribution to journalArticle

Abstract

The fluorescence of the pyrenyl chromophore in a covalently linked benzo [a] pyrene diol epoxide-N22′-deoxyguanosine complex and in noncovalent 7,8,9,10-tetrahydroxytetrahydrobenzo[a] pyrene-deoxyguanosine complexes, is strongly quenched in aqueous solution by a photoinduced electron transfer mechanism. The results of transient absorption spectroscopy experiments with picosecond laser pulse excitation are consistent with the formation of a short-lived charge transfer exciplex (nanosecond time scale) in which the pyrenyl residue acts as an electron acceptor.

Original languageEnglish (US)
Pages (from-to)597-603
Number of pages7
JournalChemical Physics Letters
Volume187
Issue number6
DOIs
StatePublished - Dec 27 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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