Bisgaard Christer Z, Clarkin Owen J, Wu Guorong, Lee Anthony M D, Gessner Oliver, Hayden Carl C, Stolow Albert
Steacie Institute for Molecular Sciences, National Research Council Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada.
Science. 2009 Mar 13;323(5920):1464-8. doi: 10.1126/science.1169183.
Random orientation of molecules within a sample leads to blurred observations of chemical reactions studied from the laboratory perspective. Methods developed for the dynamic imaging of molecular structures and processes struggle with this, as measurements are optimally made in the molecular frame. We used laser alignment to transiently fix carbon disulfide molecules in space long enough to elucidate, in the molecular reference frame, details of ultrafast electronic-vibrational dynamics during a photochemical reaction. These three-dimensional photoelectron imaging results, combined with ongoing efforts in molecular alignment and orientation, presage a wide range of insights obtainable from time-resolved studies in the molecular frame.
样品内分子的随机取向会导致从实验室角度研究化学反应时观察结果模糊。为分子结构和过程的动态成像开发的方法在这方面存在困难，因为测量最好在分子坐标系中进行。我们使用激光取向将二硫化碳分子在空间中短暂固定足够长的时间，以便在分子参考系中阐明光化学反应期间超快电子 - 振动动力学的细节。这些三维光电子成像结果，结合分子取向和排列方面正在进行的工作，预示着从分子坐标系中的时间分辨研究可获得广泛的见解。
