Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 40, 2018
Previous Article Next Article

High-resolution vibration–rotational spectra and rotational perturbation of the OO-stretching (ν6) band of CH2OO between 879.5 and 932.0 cm−1

Author affiliations

Abstract

We report the observation of a rotationally resolved ν6 band associated with the OO-stretching mode of the simplest Criegee intermediate, CH2OO, in the range of 879.5–932.0 cm−1 (11.37–10.73 μm) at an optical resolution of 0.0015 cm−1. The spectra were recorded with a tunable cw external-cavity quantum-cascade laser (EC-QCL) system coupled with a Herriott multipass absorption cell. Over one thousand lines were assigned to determine the rovibrational parameters of the ν6 band. Rotational parameters A′, B′, and C′ and higher-order parameters ΔJ, ΔJK, ΔK, δJ, and δK were determined precisely. Rotational perturbations for Ka′ = 3, Ka′ = 6, and Ka′ ≥ 11 on high-J levels were observed. In particular, for Ka′ = 6, frequency shifts as a function of J′ showed an avoided crossing; the shifts were analyzed in terms of a Coriolis interaction between modes ν6 and ν8 of CH2OO. According to the distinct temporal profiles, lines of a hot band near 899.5 cm−1 were also identified.

Graphical abstract: High-resolution vibration–rotational spectra and rotational perturbation of the OO-stretching (ν6) band of CH2OO between 879.5 and 932.0 cm−1

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Jul 2018, accepted on 14 Sep 2018 and first published on 15 Sep 2018


Article type: Paper
DOI: 10.1039/C8CP04780D
Citation: Phys. Chem. Chem. Phys., 2018,20, 25806-25811

  •   Request permissions

    High-resolution vibration–rotational spectra and rotational perturbation of the OO-stretching (ν6) band of CH2OO between 879.5 and 932.0 cm−1

    P. Luo, Y. Endo and Y. Lee, Phys. Chem. Chem. Phys., 2018, 20, 25806
    DOI: 10.1039/C8CP04780D

Search articles by author

Spotlight

Advertisements