Infrared photodissociation spectroscopy of protonated ammonia clusters in the gas phase

Colley, Jason E.

Permalink

https://hdl.handle.net/2142/104379 Copy

Description

Title

Infrared photodissociation spectroscopy of protonated ammonia clusters in the gas phase

Author(s)

Colley, Jason E.

Contributor(s)

• Duncan, Michael A.
• Wagner, J. Philipp

Issue Date

2019-06-19

Keyword(s)

Non-covalent interactions

Date of Ingest

• 2019-07-15T22:16:48Z
• 2020-01-25T19:30:38Z

Abstract

The clustering of protonated ammonia clusters, a known interstellar ion, are studied with infrared photodissociation spectroscopy in the region of 4700 to 7200 cm$^{-1}$. H$^{+}$(NH$_{3}$)$_{n}$ clusters up to n=8 are produced using a pulsed electrical discharge in a supersonic expansion. Mass-selected ions are investigated using tunable infrared laser photodissociation in the turning region of a reflectron time of flight mass spectrometer. Clusters of protonated ammonia are probed through the dissociative elimination of an ammonia. The spectra gathered were assigned by comparing to B2PLYP/def2-TZVP computations. Two bands are consistently observed for the studied protonated ammonia clusters. A band at around 5000 cm$^{-1}$ is attributed to a combination of the N-H stretching and bending modes. Another band at around 6500 cm$^{-1}$ is assigned to either an overtone or a combination of the N-H stretching modes.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Genre of Resource

Conference Paper / Presentation

Language

eng

Permalink

http://hdl.handle.net/2142/104379

DOI

https://doi.org/10.15278/isms.2019.WH10

Copyright and License Information

Copyright 2019 Jason E. Colley

Owning Collections