DETERMINATION OF ISOMER AND CONFORMER-SPECIFIC BRANCHING RATIOS OF BUFFER GAS COOLED MOLECULES DESORBED FROM AN ICE SURFACE WITH BROADBAND MM-WAVE ROTATIONAL SPECTROSCOPY

Kanaherarachchi, Anudha

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https://hdl.handle.net/2142/122706 Copy

Description

Title

DETERMINATION OF ISOMER AND CONFORMER-SPECIFIC BRANCHING RATIOS OF BUFFER GAS COOLED MOLECULES DESORBED FROM AN ICE SURFACE WITH BROADBAND MM-WAVE ROTATIONAL SPECTROSCOPY

Author(s)

Kanaherarachchi, Anudha

Contributor(s)

• Broderick, Bernadette M.
• Borengasser, Quentin D
• Hager, Travis

Issue Date

2023-06-22

Keyword(s)

Conformers and isomers

Abstract

A new instrument is described which combines buffer gas cooling with broadband rotational spectroscopy to probe molecules desorbed from an ice surface (CP-ICE). Here we report isomer and conformer-specific branching ratios of nand i-propyl cyanide, the former of which may be in either the gauche or anti configuration. Following deposition of these species onto a 4 K surface, temperature programmed desorption (TPD) experiments are performed where the sublimed gas-phase molecules are injected into a buffer gas cell (BGC) at 25 K, cooled, and detected by broadband rotational spectroscopy in the 60 – 90 GHz regime. We compare these results with room-temperature gas-phase injection of these species into the 25 K BGC and report differences observed in the conformer branching ratios.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122706

DOI

https://doi.org/10.15278/isms.2023.7264

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