Oscillations in the Spontaneous Fluorescence from Photosynthetic Reaction Centers
Oscillations in the Spontaneous Fluorescence from Photosynthetic Reaction Centers
复制标题
光合反应中心自发荧光的振荡
DOI：
10.1021/j100003a003
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
S. Boxer
中科院分区：
文献类型：
--
作者：
R. Stanley;S. Boxer
用锁模钛宝石激光器激发的80fs脉冲激发细菌光合作用反应中心的特殊对初级电子给体，利用荧光上转换技术在低温下测量了该特殊对电子给体的自发荧光。在衰变的最初几皮秒内观察到了振荡。振荡的频率和探测波长对其强度的依赖关系与Vos、Martin和他的同事使用受激辐射得到的结果相似。这表明振荡与特殊对的激发态有关，而与受激拉曼散射无关。振动相干在电子转移的时间尺度上持续存在。讨论了这些结果与其他观测结果之间的可能关系。参考文献30篇，图4。
The spontaneous fluorescence from the special pair primary electron donor in bacterial photosynthetic reaction centers has been measured at low temperature using fluorescence up-conversion following excitation of the special pair with 80 fs pulses from a mode-locked Ti:sapphire laser. Oscillations are observed during the first few picoseconds of the decay. The frequency of the oscillations and the detection wavelength dependence of their intensity are similar to results obtained by Vos, Martin, and co-workers using stimulated emission. This demonstrates that the oscillations are associated with the excited state of the special pair, not with stimulated Raman scattering. Vibrational coherence persists on the time scale of electron transfer. Possible relationships between these results and other observables are discussed. 30 refs., 4 figs.