Strong Field Ionization-Photofragmentation on Ultrafast Evolution of Electronic States of Toluene Cations,The Journal of Physical Chemistry A

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Strong Field Ionization-Photofragmentation on Ultrafast Evolution of Electronic States of Toluene Cations
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2021-03-04 , DOI: 10.1021/acs.jpca.0c11547
Longxing Zhou ₁ , Yang Liu ₁ , Tian Sun ₁ , Hang Yin ₁ , Yiwen Zhao ₁ , Hang Lv ₁ , Haifeng Xu ₁

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Ultrafast time-resolved strong field ionization-photofragmentation (SFI-PF) has emerged as a useful method for investigation of dynamics of molecular cations. Here we perform a SFI-PF study on the electronic states of toluene cations. By measuring the ion yields as a function of delay time, we obtain the transients of both parent and daughter ions, which show ultrafast decays and out-of-phase oscillations. The results provide the first experimental evidence of D₁–D₀ ultrafast relaxation of toluene cations occurring in about 530 fs and indicate coincident resonance between the vibrational states in D₁ and D₀ leading to oscillations with a period of about 2.05 ps. Our study should shed some light on the ultrafast photochemistry involving complex molecular cations.

中文翻译：

强场电离-光碎裂对甲苯阳离子电子态的超快演化

超快时间分辨强场电离-光碎裂（SFI-PF）已经成为研究分子阳离子动力学的有用方法。在这里，我们对甲苯阳离子的电子状态进行了SFI-PF研究。通过测量作为延迟时间函数的离子产率，我们获得了母离子和子离子的瞬态信号，这些瞬态信号显示出超快的衰减和异相振荡。结果提供了第一个实验证据，表明D ₁ –D ₀约在530 fs内出现了甲苯阳离子的超快弛豫，表明D ₁和D ₀的振动状态之间具有一致的共振。导致振荡周期约为2.05 ps。我们的研究应为涉及复杂分子阳离子的超快速光化学提供一些启示。

更新日期：2021-03-18

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