Modulating unimolecular charge transfer by exciting bridge vibrations.
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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.
Published Version (Please cite this version)10.1021/ja907041t
Publication InfoLin, Zhiwei; Lawrence, Candace M; Xiao, Dequan; Kireev, Victor V; Skourtis, Spiros S; Sessler, Jonathan L; ... Rubtsov, Igor V (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.
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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