Files in this item

FilesDescriptionFormat

application/vnd.openxmlformats-officedocument.presentationml.presentation

application/vnd.openxmlformats-officedocument.presentationml.presentation1067970.pptx (8MB)
PresentationMicrosoft PowerPoint 2007

application/pdf

application/pdf2910.pdf (22kB)
AbstractPDF

Description

Title:HIGH RESOLUTION SPECTRA OF THE SIMPLEST CRIEGEE INTERMEDIATE CH2OO BETWEEN 880 AND 932 cm−1
Author(s):Luo, Pei-Ling
Contributor(s):Lee, Yuan-Pern; Endo, Yasuki
Subject(s):Radicals
Abstract:The Criegee intermediates (CI) play critical roles in atmospheric chemistry. \chem{CH_2OO} is the simplest CI and its characterization is important for investigations of reaction mechanisms and molecular structure. In this work, high-resolution spectra of the OO-stretching (\nub{6}) mode of \chem{CH_2OO} in the range of 880$\textendash$932 \wn have been recorded using a quantum cascade laser (QCL) system coupled with a multi-pass Herriott cell. The \chem{CH_2OO} was produced from the reaction of \chem{CH_2I} + \chem{O_2} in a flowing mixture of \chem{CH_2I_2}$/$\chem{O_2} (1/213) at 3.2 Torr upon irradiation at 248 nm with an excimer laser. The spectrum was recorded by step-scanning the QCL with a step size of ~0.0016 \wn; its wavelength was calibrated with a \chem{C_2H_4} reference cell and a germanium etalon. Over one thousand lines were assigned and used for fitting of molecular constants of \chem{CH_2OO}. Furthermore, the rotational perturbations on the high-J levels of K$_{a}$ = 3, K$_{a}$ = 6, and K$_{a}$ $\geq$ 11 were observed.
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100486
DOI:10.15278/isms.2018.WD04
Other Identifier(s):WD04
Date Available in IDEALS:2018-08-17
2018-12-12


This item appears in the following Collection(s)

Item Statistics