Volume 10, Issue 1 p. 101-110
Minireview

Excited-State Dynamics of Isolated DNA Bases: A Case Study of Adenine

Christer Z. Bisgaard Dr.

Christer Z. Bisgaard Dr.

Steacie Institute for Molecular Sciences, Ottawa, ON, K1A 0R6 (Canada), Fax: (+1) 613-991-3437

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Helmut Satzger Dr.

Helmut Satzger Dr.

Steacie Institute for Molecular Sciences, Ottawa, ON, K1A 0R6 (Canada), Fax: (+1) 613-991-3437

Current address: Leibniz Supercomputing Centre, Boltzmannstr. 1, 85748 Garching (Germany)

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Susanne Ullrich Dr.

Susanne Ullrich Dr.

Department of Physics and Astronomy, University of Georgia, Athens, GA, 30602-2451 (USA), Fax: (+1) 706-542-2492

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Albert Stolow Dr.

Albert Stolow Dr.

Steacie Institute for Molecular Sciences, Ottawa, ON, K1A 0R6 (Canada), Fax: (+1) 613-991-3437

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First published: 07 January 2009
Citations: 82

Graphical Abstract

Ultrafast dynamics: An overview of the UV photophysics of the isolated DNA base adenine is presented. The authors use their recent femtosecond time-resolved photoelectron spectroscopy experiments (see spectra) to shed light on the mechanisms behind the ultra-fast electronic relaxation from the initially excited state.

Abstract

We present a summary of recent advances in the understanding of the UV photophysics of the isolated DNA base adenine, emphasizing a discussion of the mechanisms behind the ultrafast relaxation following excitation to the ππ* band. Drawing on our femtosecond time-resolved photoelectron spectroscopy experiments, we discuss differences in the ultrafast relaxation of adenine and 9-methyladenine and consider the relative merits of the various proposed mechanisms.