期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 24, 期 25, 页码 15416-15427出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cp01268e
关键词
-
资金
- U.S. Department of Energy (DOE) Office of Science, Office of Basic Energy Sciences, SUF Division Accelerator and Detector RD program [DE-AC02-05CH11231, DE-AC02-76SF00515]
- EPSRC [EP/R010609/1, EP/V049240/1, EP/V006819/1]
- Leverhulme Trust [RPG-2020-208]
- Swedish Collegium for Advanced Studies - Erling-Persson Family Foundation
- Knut and Alice Wallenberg Foundation
- University of Edinburgh
- University of Southampton [EP/T517859/1]
- U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division
- US Department of Energy Office of Science, Basic Energy Sciences [DE-SC0014170]
- Department of Energy [DE-FG02-08ER15984]
The structural dynamics of photoexcited gas-phase carbon disulfide molecules were investigated using ultrafast electron diffraction, revealing the processes of optical excitation and molecular dissociation, as well as the energy level transitions and fragment generation between different electronic systems.
The structural dynamics of photoexcited gas-phase carbon disulfide (CS2) molecules are investigated using ultrafast electron diffraction. The dynamics were triggered by excitation of the optically bright B-1(2)((1)sigma(+)(u)) state by an ultraviolet femtosecond laser pulse centred at 200 nm. In accordance with previous studies, rapid vibrational motion facilitates a combination of internal conversion and intersystem crossing to lower-lying electronic states. Photodissociation via these electronic manifolds results in the production of CS fragments in the electronic ground state and dissociated singlet and triplet sulphur atoms. The structural dynamics are extracted from the experiment using a trajectory-fitting filtering approach, revealing the main characteristics of the singlet and triplet dissociation pathways. Finally, the effect of the time-resolution on the experimental signal is considered and an outlook to future experiments provided.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据