CAVITY RING DOWN MEASUREMENTS ON PROPYLENE OXIDE IN THE 3μm REGION

Peterß, Fabian

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https://hdl.handle.net/2142/122387 Copy

Description

Title

CAVITY RING DOWN MEASUREMENTS ON PROPYLENE OXIDE IN THE 3μm REGION

Author(s)

Peterß, Fabian

Contributor(s)

• Fuchs, Guido W.
• Giesen, Thomas
• Vávra, Karel

Issue Date

2023-06-22

Keyword(s)

Vibrational structure/frequencies

Abstract

Propylene oxide (also known as methyloxirane) is one of the simplest chiral molecules and also shows effects of internal rotation of its methyl group. It is a much studied molecule and has received much scientific attention in the past. Propylene oxide has 24 fundamental vibrational modes, with each vibrational mode consisting out of thousands of ro-vibrational transitions. So far, ro-vibrationally resolved experimental data for the vibrational spectrum however, have been quite sparse. To address this problem, there has recently been a strong effort in our research group to obtain jet-cooled ro-vibrationally resolved spectra of propylene oxide. In this way the CH₃ torsion, CH₂, CH₃ rocking and ring breathing fundamental vibrational modes have been investigated with different experimental techniques. In this work we will present our efforts in obtaining a continuous jet-cooled spectrum of propylene oxide in the 3µm region with a cw-OPO cavity ringdown spectrometer and report about our latest progress in analysing the C-H stretching group in the 3µm region. In the measured spectrum, various combination bands have also been observed, whose impact on neighbouring vibration bands will also be discussed.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122387

DOI

https://doi.org/10.15278/isms.2023.6940

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