Modulating unimolecular charge transfer by exciting bridge vibrations.
Abstract
Ultrafast UV-vibrational spectroscopy was used to investigate how vibrational excitation
of the bridge changes photoinduced electron transfer between donor (dimethylaniline)
and acceptor (anthracene) moieties bridged by a guanosine-cytidine base pair (GC).
The charge-separated (CS) state yield is found to be lowered by high-frequency bridge
mode excitation. The effect is linked to a dynamic modulation of the donor-acceptor
coupling interaction by weakening of H-bonding and/or by disruption of the bridging
base-pair planarity.
Type
Journal articleSubject
Aniline CompoundsAnthracenes
Cytidine
Electron Transport
Guanosine
Hydrogen Bonding
Kinetics
Models, Chemical
Molecular Structure
Photochemistry
Spectrophotometry, Ultraviolet
Vibration
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https://hdl.handle.net/10161/4047Published Version (Please cite this version)
10.1021/ja907041tPublication Info
(2009). Modulating unimolecular charge transfer by exciting bridge vibrations. J Am Chem Soc, 131(50). pp. 18060-18062. 10.1021/ja907041t. Retrieved from https://hdl.handle.net/10161/4047.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
David N. Beratan
R.J. Reynolds Distinguished Professor of Chemistry
Dr. Beratan is developing theoretical approaches to understand the function of complex
molecular and macromolecular systems, including: the molecular underpinnings of energy
harvesting and charge transport in biology; the mechanism of solar energy capture
and conversion in man-made structures; the nature of charge conductivity in naturally
occurring nucleic acids and in synthetic constructs, including the photochemical repair
of damaged DNA in extremophiles; CH bond activation by copper oxygenas
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