飞秒化学
Femtochemistry.
作者信息
Tanimura Y, Yamashita K, Anfinrud P A
机构信息
Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8585, Japan.
出版信息
Proc Natl Acad Sci U S A. 1999 Aug 3;96(16):8823-4. doi: 10.1073/pnas.96.16.8823.
The topic of femtochemistry is surveyed from both theoretical and experimental points of view. A time-dependent wave packet description of the photodissociation of the O---C---S molecule reveals vibrational motion in the transition-state region and suggests targets for direct experimental observation. Theoretical approaches for treating femtosecond chemical phenomena in condensed phases are featured along with prospects for laser-controlled chemical reactions by using tailored ultrashort chirped pulses. An experimental study of the photoisomerization of retinal in the protein bacteriorhodopsin is discussed with an aim to gain insight into the potential energy surfaces on which this remarkably efficient and selective reactions proceeds. Finally, a prospective view of new frontiers in femtochemistry is given.
本文从理论和实验两个角度对飞秒化学的主题进行了综述。对O---C---S分子光解离的含时波包描述揭示了过渡态区域的振动运动，并为直接实验观测指明了目标。文中介绍了处理凝聚相中飞秒化学现象的理论方法，以及利用定制的超短啁啾脉冲实现激光控制化学反应的前景。讨论了对蛋白质细菌视紫红质中视黄醛光异构化的实验研究，目的是深入了解这一高效且选择性反应所发生的势能面。最后，给出了飞秒化学新前沿的前瞻性展望。
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