Study of picosecond processes of an intercalated dipyridophenazine Cr(III) complex bound to defined sequence DNAs using transient absorption and time-resolved infrared methods

Dalton Trans. 2014 Dec 21;43(47):17606-9. doi: 10.1039/c4dt01989j.

Abstract

Picosecond transient absorption (TA) and time-resolved infrared (TRIR) measurements of rac-[Cr(phen)2(dppz)](3+) () intercalated into double-stranded guanine-containing DNA reveal that the excited state is very rapidly quenched. As no evidence was found for the transient electron transfer products, it is proposed that the back electron transfer reaction must be even faster (<3 ps).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromium / chemistry*
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry*
  • DNA / chemistry*
  • DNA / genetics
  • Molecular Conformation
  • Phenazines / chemistry*
  • Spectrophotometry, Infrared
  • Spectrophotometry, Ultraviolet
  • Time Factors

Substances

  • Coordination Complexes
  • Phenazines
  • Chromium
  • DNA