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Near-threshold photodissociation dynamics of CHCl₃

  • Energy- and angle-resolved photofragment distributions for ground-state Cl (²P₃/₂) and spin–orbit excited Cl* (²P₁/₂) have been recorded using the velocity map imaging technique after photodissociation of chloroform at wavelengths of 193 and ∼235 nm. Translational energy distributions are rather broad and peak between 0.6 and 1.0 eV. The spin–orbit branching ratios [Cl*]/[Cl] are 1 and 0.3 at 193 and 235 nm, respectively, indicating the involvement of two or more excited state surfaces. Considering the anisotropy parameters and branching ratios collectively, we conclude that the reaction at 193 nm takes place predominantly on the ¹Q₁ surface, while the ³Q₁ surface gains importance at lower dissociation energies around 235 nm.

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Author:Mike Reid, Victoria Green, Sven P. K. KöhlerORCiD
DOI original:https://doi.org/10.1039/C3CP55348E
Parent Title (English):Physical Chemistry Chemical Physics
Publisher:Royal Society of Chemistry
Document Type:Article
Year of Completion:2014
Publishing Institution:Hochschule Hannover
Release Date:2022/06/23
GND Keyword:Photodissoziation; Chloroform; Bildgebendes Verfahren
Page Number:6
Institutes:Fakultät II - Maschinenbau und Bioverfahrenstechnik
DDC classes:660 Technische Chemie
Licence (German):License LogoUrheberrechtlich geschützt