Department of Chemistry and Oregon Center for Optics, University of Oregon, Eugene, Oregon 97403, USA.
J Phys Chem A. 2012 Feb 23;116(7):1683-93. doi: 10.1021/jp2094609. Epub 2012 Feb 10.
We investigated electronic energy-transfer dynamics in three model dimers within which coherent intramonomer nuclear motion had been induced by impulsive Raman excitation using an optimized, electronically preresonant control pulse. Calculations of the donor-survival probability, the ultrafast pump-probe signal, and the pump-probe difference signal are presented for dithia-anthracenophane and homodimers of 2-difluoromethylanthracene and 2-trifluoromethylanthracene. Survival probabilities and signals, along with phase-space analyses, elucidated the mechanisms, extent, and spectroscopic manifestations of external vibrational or torsional control over electronic excitation transfer.
我们研究了三个模型二聚体中的电子能量转移动力学，其中通过使用优化的、电子预共振控制脉冲的脉冲 Raman 激发诱导了单体内部的相干核运动。给出了二噻蒽并菲和 2-二氟甲基蒽和 2-三氟甲基蒽同二聚体的供体存活概率、超快泵浦探针信号和泵浦探针差信号的计算结果。存活概率和信号以及相空间分析阐明了外部振动或扭转控制对电子激发转移的机制、程度和光谱表现。
