Fragmentation of Hydrocarbon Molecules in Intense Laser Fields Studied by Coincidence Momentum Imaging: A Review
Fragmentation of Hydrocarbon Molecules in Intense Laser Fields Studied by Coincidence Momentum Imaging: A Review
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重合动量成像研究强激光场中碳氢化合物分子的碎裂：综述
DOI：
10.6122/cjp.52.652
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发表时间：
2014-02
影响因子：
5
通讯作者：
Yamanouchi Kaoru
中科院分区：
文献类型：
--
作者：
Yang Bosi;Zhang Li;Xu Huailiang;Li Ruxin;Yamanouchi Kaoru
多原子分子的碎裂是强激光场中的一个基本化学反应，当激光脉冲的电场强度相当于或超过分子内的库仑结合场时。对于烃类分子，由于轻氢原子（或质子）的迁移会导致分子的化学键重排，烃类分子的断裂可能会产生新的碎片种类，而这些碎片种类无法通过直接断键从分子的初始几何构型中实现，这使得对其动态断裂过程的全面表征变得困难。本文综述了利用符合动量成像方法研究强激光诱导烃类分子裂解的最新进展，该方法可以提供有关分子裂解通道的明确信息。综述了氢迁移对烃类分子断裂的影响，并在此基础上讨论了通过控制质子在烃类分子中的运动来控制化学键断裂/形成的新的可能方案。
Fragmentation of polyatomic molecules is a fundamental chemical reaction in intense laser fields when the electric field strength of the laser pulse is comparable to or exceeds the intra-molecular Coulomb binding fields. For hydrocarbon molecules, because of the migration of light hydrogen atom (or proton) that can lead to chemical bond rearrangement of molecules, fragmentation of hydrocarbon molecules may result in new fragment species that could not be realized from the initial geometry of molecules by direct bond breaking, making the full characterization of their dynamical fragmentation processes difficult. In this article, we will review recent progress in the study of fragmentation of hydrocarbon molecules induced by intense laser fields using the coincidence momentum imaging method that can provide definite information on the fragmentation channels of molecules. The effect of hydrogen migration on fragmentation of hydrocarbon molecules is reviewed, based on which new possible schemes for controlling chemical bond breaking/formation by controlling the motion of protons within a hydrocarbon molecule is discussed.