JET-COOLED AND LONG PATH CELL HIGH RESOLUTION INFRARED SPECTROSCOPY OF FURFURAL CONFORMERS FROM FOURIER TRANSFORM AND QCL MEASUREMENTS

Asselin, Pierre

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https://hdl.handle.net/2142/122450 Copy

Description

Title

JET-COOLED AND LONG PATH CELL HIGH RESOLUTION INFRARED SPECTROSCOPY OF FURFURAL CONFORMERS FROM FOURIER TRANSFORM AND QCL MEASUREMENTS

Author(s)

Asselin, Pierre

Contributor(s)

• Cuisset, Arnaud
• Georges, Robert
• Goubet, Manuel
• Chawananon, Sathapana

Issue Date

2023-06-21

Keyword(s)

Atmospheric science

Abstract

Furfural, C₄H₃OCHO, is a volatile organic compound produced from biomass burning. Its oxidation may lead to secondary organic aerosol formation, making it necessary to provide accurate spectroscopic data to evaluate its impact. Two conformations exist in the gas phase, with the oxygen atoms oriented in a more stable trans configuration than the cis one. Durig et al.ᵃ exploited far-infrared (IR) data to determine relative stabilities and the conformational barrier height. Motiyenko et al.ᵇ conducted extensive microwave spectroscopic studies providing molecular parameters in the ground state (GS) and low-lying vibrational states up to 400 cm−¹. No splitting due to the internal rotation of the CHO top has been observed in these states. We report here a high-resolution study of furfural across a wide infrared range, combining the Jet-AILES setup, a continuous supersonic jet on the IR AILES beamline at SOLEIL, and a long path cell, both coupled to a Fourier Transform Spectrometer and the SPIRALES setup at MONARIS, a pulsed supersonic jet coupled to mid-IR quantum cascade lasersᶜ. In the fingerprint region, 7 bands of trans- and 2 bands of cis-furfural were recorded at low temperature. About 15,000 lines from GS and 7(2) excited states (ES) of trans(cis-)furfural, respectively, were fitted within experimental accuracy. In the far-IR range, global fits including GS and ES rotational and ES rovibrational transitions enable the refinement of molecular parameters derived from the microwave study and the determination of precise vibrational band centers.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122450

DOI

https://doi.org/10.15278/isms.2023.6759

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