- Modulating unimolecular charge transfer by exciting bridge vibrations.
Modulating unimolecular charge transfer by exciting bridge vibrations.
Journal of the American Chemical Society (2009-11-26)
Zhiwei Lin, Candace M Lawrence, Dequan Xiao, Victor V Kireev, Spiros S Skourtis, Jonathan L Sessler, David N Beratan, Igor V Rubtsov
PMID19928957
摘要
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.