AI Article Synopsis
- The study examines how photoexcited carbon disulfide (CS) molecules behave using ultrafast electron diffraction, triggered by a 200 nm ultraviolet laser pulse.
- It explores how rapid vibrational movements lead to internal conversion and intersystem crossing, causing the production of CS fragments and sulfur atoms when the molecules break apart.
- The research utilizes a trajectory-fitting filtering method to analyze the structural dynamics and dissociation processes, while also discussing the impact of time-resolution on the experimental results and what future experiments might involve.
Article Abstract
The structural dynamics of photoexcited gas-phase carbon disulfide (CS) molecules are investigated using ultrafast electron diffraction. The dynamics were triggered by excitation of the optically bright B(Σ) 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 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.
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| http://dx.doi.org/10.1039/d2cp01268e | DOI Listing |
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