Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 150, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5086665
Keywords
-
Funding
- Department of Energy [DEFG02-08ER15984]
- Government of Hungary
- European Regional Development Fund [VEKOP-2.3.2-16-2017-00015]
- Engineering and Physical Sciences Research Council (EPSRC)
Ask authors/readers for more resources
We compare the excited state dynamics of diiodomethane (CH2I2) and bromoiodomethane (CH2BrI) using time resolved photoelectron spectroscopy. A 4.65 eV UV pump pulse launches a dissociative wave packet on excited states of both molecules and the ensuing dynamics are probed via photoionization using a 7.75 eV probe pulse. The resulting photoelectrons are measured with the velocity map imaging technique for each pump-probe delay. Our measurements highlight differences in the dynamics for the two molecules, which are interpreted with high-level ab initio molecular dynamics (trajectory surface hopping) calculations. Our analysis allows us to associate features in the photoelectron spectrum with different portions of the excited state wave packet represented by different trajectories. The excited state dynamics in bromoiodomethane are simple and can be described in terms of direct dissociation along the C-I coordinate, whereas the dynamics in diiodomethane involve internal conversion and motion along multiple dimensions. Published under license by AIP Publishing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available