High-resolution infrared spectroscopy of isoprene and methyl vinyl ketone in the 10 μm region

Stewart, Jacob

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https://hdl.handle.net/2142/100611 Copy

Description

Title

High-resolution infrared spectroscopy of isoprene and methyl vinyl ketone in the 10 μm region

Author(s)

Stewart, Jacob

Contributor(s)

• Pereira, Marcus Vinicus
• Tran, Minh Nhat
• Iranpour, Michael Cyrus
• Hoadley, Tyler

Issue Date

2018-06-19

Keyword(s)

Atmospheric science

Abstract

Isoprene (C5H8) is the most abundant biogenic volatile organic compound (BVOC) emitted by plants into Earth’s atmosphere and plays a key role in the chemistry of the troposphere. Isoprene (and other BVOCs) play a role in the formation of secondary organic aerosols and production of tropospheric ozone, a pollutant that is a major part of photochemical smog. One attractive means of measuring isoprene levels in the atmosphere is the use of infrared spectroscopy to monitor strong absorption bands that lie in the “atmospheric window” between 8-14 µm. We have measured the high-resolution infrared spectrum of isoprene in the region of the strong ν26 vibrational band near 10 µm using a quantum cascade laserbased spectrometer. This work will support future efforts to use the ν26 band for sensing applications. We will discuss the assignment of several weaker bands we have observed near the main ν26 band and a rotational analysis based on the strong Q-branches. In addition, we have also observed the high-resolution spectrum of methyl vinyl ketone (C4H6O), an oxidation product of isoprene, in this same frequency region, and will present a preliminary analysis of our spectrum.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100611

DOI

10.15278/isms.2018.TF08

Copyright and License Information

Copyright 2018 Jacob Stewart

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