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Updated: Apr 24, 2026

Submillisecond Conformational Changes in Proteins Resolved by Photothermal Beam Deflection
Published on: February 18, 2014
Study of picosecond processes of an intercalated dipyridophenazine Cr(III) complex bound to defined sequence DNAs
Stephen J Devereux1, Páraic M Keane, Suni Vasudevan
1School of Chemistry and Chemical Biology, Centre for Synthesis and Chemical Biology, University College Dublin, Dublin 4, Ireland. susan.quinn@ucd.ie.
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).
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