Efficient charge transport in DNA diblock oligomers

Josh Vura-Weis, Michael R. Wasielewski, Arun K. Thazhathveetil, Frederick D. Lewis

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

The realization of highly efficient photoinduced charge separation across the π-stacked base pairs in duplex DNA remains elusive. The low efficiencies (<5%) typically observed for charge separation over a dozen or more base pairs are a consequence of slow charge transport and rapid charge recombination. We report here a significant (5-fold or greater) enhancement in the efficiency of charge separation in diblock purine oligomers consisting of two or three adenines followed by several guanines, when compared to oligomers consisting of a single purine or alternating base sequences. This approach to wire-like behavior is attributed to both slower charge recombination and faster charge transport once the charge reaches the G-block in these diblock systems.

Original languageEnglish
Pages (from-to)9722-9727
Number of pages6
JournalJournal of the American Chemical Society
Volume131
Issue number28
DOIs
Publication statusPublished - Jul 22 2009

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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