High-resolution spectroscopy of transient free radicals with a mid-infrared dual-comb spectrometer
Luo, Pei-Ling
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https://hdl.handle.net/2142/107515
Description
Title
High-resolution spectroscopy of transient free radicals with a mid-infrared dual-comb spectrometer
Author(s)
Luo, Pei-Ling
Issue Date
2020-06-23
Keyword(s)
Radicals
Abstract
We performed time-resolved dual-comb spectroscopy near 3400 \wn upon flash photolysis of flowing mixtures of \chem{(COCl)_2} or \chem{Cl_2}/\chem{CH_3OH}/\chem{O_2}/\chem{N_2}/\chem{NO}. The high-resolution transient absorption spectroscopy was demonstrated by utilizing an electro-optic dual-comb system\footnote{Ref: Phys. Chem. Chem. Phys. 21, 18400, (2019)} coupled with a Herriott flow cell. With this new approach, absorbance signals of several species in the flow reactor, such as \chem{HO_2}, \chem{CH_3OH}, \chem{H_2CO}, and \chem{OH} were able to be simultaneously monitored with adequate spectral and temporal resolutions. Based on great 3D spectral features, reaction kinetics of \chem{HO_2} with \chem{NO} were also studied.
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