New Insights into the Photophysics of DNA Nucleobases
Prokhorenko, VI, Picchiotti, A, Pola, M et al. (2 more authors)
(2016)
New Insights into the Photophysics of DNA Nucleobases.
Journal of Physical Chemistry Letters, 7 (22).
pp. 4445-4450.
ISSN 1948-7185
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.
Metadata
Authors/Creators:
Prokhorenko, VI
Picchiotti, A
Pola, M
Dijkstra, AG
Miller, RJD
Copyright, Publisher and Additional Information:
(c) 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, copyright (c) American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.6b02085
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