Issue 26, 2019

Imaging H abstraction dynamics in crossed molecular beams: O(3P) + propanol isomers

Abstract

The crossed beam reaction dynamics of ground state O(3P) atoms with propanol isomers (1-propanol and 2-propanol) have been studied for the first time using the velocity map imaging technique. The hydroxypropyl radical products, generated from H-abstraction of the secondary and tertiary C–H groups of propanol isomers, were detected via single photon ionization at 157 nm under single collision conditions with collision energies of 8 and 10 kcal mol−1. Direct rebound dynamics were suggested by the angular distributions, which show overall sideways-backward scattering but more pronounced backward scattering for both isomer reactions under all collision energies studied here. All the translational energy distributions peak at low energy, on average 20–40% of the total available energy. This indicates high internal excitation in the products that is treated by various models of energy release. We infer that most of the total available energy is partitioned into rotational excitation due to the long-rang dipole–dipole interaction between the dipolar OH and hydroxypropyl radicals.

Graphical abstract: Imaging H abstraction dynamics in crossed molecular beams: O(3P) + propanol isomers

Article information

Article type
Paper
Submitted
11 okt 2018
Accepted
15 nov 2018
First published
15 nov 2018

Phys. Chem. Chem. Phys., 2019,21, 14186-14194

Author version available

Imaging H abstraction dynamics in crossed molecular beams: O(3P) + propanol isomers

H. Li, A. Kamasah and A. G. Suits, Phys. Chem. Chem. Phys., 2019, 21, 14186 DOI: 10.1039/C8CP06351F

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