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  New Insights into the Photophysics of DNA Nucleobases

Prokhorenko, V., Picchiotti, A., Pola, M., Dijkstra, A., & Miller, R. J. D. (2016). New Insights into the Photophysics of DNA Nucleobases. The Journal of Physical Chemistry Letters, 7(22), 4445-4450. doi:10.1021/acs.jpclett.6b02085.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-B9A1-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-EF91-E
Genre: Journal Article

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acs.jpclett.6b02085.pdf (Publisher version), 3MB
 
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http://dx.doi.org/10.1021/acs.jpclett.6b02085 (Publisher version)
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© 2016, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, © American Chemical Society after peer review and technical editing by the publisher.

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 Creators:
Prokhorenko, Valentyn1, Author              
Picchiotti, Alessandra1, 2, Author              
Pola, Martina3, Author
Dijkstra, Arend1, 4, 5, Author              
Miller, R. J. Dwayne1, Author              
Affiliations:
1Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, escidoc:1938288              
2International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, escidoc:2266714              
3Institute for Theoretical Physics, University of Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany, escidoc:persistent22              
4Department of Chemistry and Department of Physics, University of Toronto, 80 St. George Street, Toronto, Canada M5S 1H6, escidoc:persistent22              
5The Hamburg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany, escidoc:persistent22              

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 Abstract: We report the results of an extended time-resolved study of DNA nucleobases in aqueous solutions conducted in the deep UV using broad-band femtosecond transient absorption and electronic two-dimensional spectroscopies. We found that the photodeactivation in all DNA nucleobases occurs in two steps: fast relaxation (500–700 fs) from the excited state ππ* to a “dark” state and its depopulation to the ground state within 1–2 ps. Our experimental observations and performed theoretical modeling allow us to conclude that this dark state can be associated with the nπ* electronic state, which is connected to the excited and ground states via conical intersections.

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Language(s): eng - English
 Dates: 2016-09-122016-10-242016-10-242016-11-17
 Publication Status: Published in print
 Pages: 6
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 Rev. Method: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.6b02085
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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: 6 Volume / Issue: 7 (22) Sequence Number: - Start / End Page: 4445 - 4450 Identifier: CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/1948-7185