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Issue 26, 2019
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Photodissociation of CH2BrI using cavity ring-down spectroscopy: in search of a BrI elimination channel

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Abstract

Photodissociation of CH2BrI was investigated in search of unimolecular elimination of BrI via a primary channel using cavity ring-down absorption spectroscopy (CRDS) at 248 nm. The BrI spectra were acquired involving the first three ground vibrational levels corresponding to A3Π1 ← X1Σ+ transition. With the aid of spectral simulation, the BrI rotational lines were assigned. The nascent vibrational populations for v′′ = 0, 1, and 2 levels are obtained with a population ratio of 1 : (0.58 ± 0.10) : (0.34 ± 0.05), corresponding to a Boltzmann-like vibrational temperature of 713 ± 49 K. The quantum yield of the ground state BrI elimination reaction is determined to be 0.044 ± 0.014. The CCSD(T)//B3LYP/MIDI! method was employed to explore the potential energy surface for the unimolecular elimination of BrI from CH2BrI.

Graphical abstract: Photodissociation of CH2BrI using cavity ring-down spectroscopy: in search of a BrI elimination channel

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Supplementary files

Article information


Submitted
29 Jun 2018
Accepted
06 Aug 2018
First published
07 Aug 2018

Phys. Chem. Chem. Phys., 2019,21, 13943-13949
Article type
Paper

Photodissociation of CH2BrI using cavity ring-down spectroscopy: in search of a BrI elimination channel

B. Muthiah, D. Paredes-Roibás, T. Kasai and K. Lin, Phys. Chem. Chem. Phys., 2019, 21, 13943
DOI: 10.1039/C8CP04130J

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