Visualization of Chemical Reactions by Ultrafast Imaging

通过超快成像实现化学反应的可视化

• 批准号: 09440208
• 负责人: SUZUKI Toshinori
• 金额: $ 9.47万
• 依托单位: Okazaki National Research Institutes
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09440208/
• 关键词: photoelectron imaging; ultrafast spectroscopy; ion imaging; intense laser field; 化学反応; RRKM理論

Due to the advent of ultrafast laser technology, real-time studies of molecular dynamics has become possible. This work combines the pump-probe method using femtosecond laser with two-dimensional ion/electron imaging technique to visualize elementary chemical reactions in the gad phase. We employed (1) intense field Coulomb exposition and (2) photoelectron imaging methods. In the former, many of the valence electrons were removed from a molecule to let them explode due to Coulombic repulsion and the scattering distributions of multiply-charged atomic fragments were visualized. Linearity of triatomic molecules in the course of dissociation was discussed in terms of scattering distributions. In the latter technique, NO and pyrazine molecules were excited to the first electronic state, and electron scattering distributions by one and two photon ionization were imaged. Ultrafast intersystem crossing was clearly visualized for the first time.

由于超快激光技术的出现，分子动力学的实时研究已成为可能。这项工作将使用飞秒激光的泵浦探针方法与二维离子/电子成像技术相结合，以可视化 gad 相中的基本化学反应。我们采用（1）强场库仑曝光和（2）光电子成像方法。在前者中，许多价电子被从分子中移除，使它们由于库仑斥力而爆炸，并且多电荷原子碎片的散射分布被可视化。根据散射分布讨论了解离过程中三原子分子的线性。在后一种技术中，NO 和吡嗪分子被激发到第一电子态，并通过一个和两个光子电离对电子散射分布进行成像。超快的系间穿越首次清晰可见。

项目成果

Yuxiang Mo and Toshinori Suzuki: "Vector correlation in molecular photodissociation : Quantum mechanical expression for multipole moments and comparison with formal expansion formula"J. Chem. Phys.. (in press).

莫宇翔、铃木俊德：“分子光解离中的矢量关联：多极矩的量子力学表达及其与形式展开式的比较”J.

Toshinori Suzuki, Yang Shi, and Hiroshi Kohguchi: "Detection of metastable triplet acetylene produced by intersystem crossing from the excited A(ィイD11ィエD1AィイD2uィエD2) state"Journal of Chemical Physics. 106. 5292-5295 (1997)

Toshinori Suzuki、Yang Shi 和 Hiroshi Kohguchi：“检测由激发 A 态的系间穿越产生的亚稳态三重态乙炔”Journal of Chemical Chemistry 106. 5292-5295 (1997)。

Li Wang, Hiroshi Kohguchi, Toshinori Suzuki: "Femtosecond time-resolved photoelectron imaging"Faraday Discuss. Chem. Soc.. (in press).

王力、小口浩、铃木敏则：《飞秒时间分辨光电子成像》法拉第讨论。

T.Shibata et al.: "Dissociaton of metastable CH_3CO radical observed by subpscosecond time-clocked imaging" J.Phys.Chem.A. (in press).

T.Shibata 等人：“亚皮秒时钟成像观察到的亚稳态 CH_3CO 自由基的解离”J.Phys.Chem.A。

Hashimoto and Suzuki: "Predissociation of acetylene from the A state" Journal of Chemical Physics. 110. 2042-2050 (1999)

桥本和铃木：“乙炔从 A 态预解离”化学物理杂志。