Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
J Am Chem Soc. 2009 Dec 23;131(50):18060-2. doi: 10.1021/ja907041t.
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.
超快紫外振动光谱被用于研究在由鸟嘌呤-胞嘧啶碱基对（GC）桥接的供体（二甲苯胺）和受体（蒽）部分之间的光诱导电子转移中，桥的振动激发如何变化。发现通过高频桥模激发会降低电荷分离（CS）状态的产率。这种效应与氢键的减弱和/或桥接碱基对平面性的破坏导致供体-受体耦合相互作用的动态调制有关。
