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Type: Journal article
Title: Rotational Energy Distributions of Benzene Liberated from Aqueous Liquid Microjets: A Comparison between Evaporation and Infrared Desorption
Author: Maselli, O.
Gascooke, J.
Kobelt, S.
Metha, G.
Buntine, M.
Citation: Australian Journal of Chemistry: an international journal for chemical science, 2006; 59(2):104-108
Publisher: C S I R O Publishing
Issue Date: 2006
ISSN: 0004-9425
Statement of
Olivia J. Maselli, Jason R. Gascooke, Sarah L. Kobelt, Gregory F. Metha and Mark A. Buntine
Abstract: We have measured the rotational energy distribution of benzene molecules both evaporated and desorbed by an IR laser from a liquid microjet. Analysis of the 6₀¹ vibronic band of benzene has shown that the benzene molecules evaporating from the liquid microjet surface have a rotational temperature of 157 ± 7 K. In contrast, the rotational temperature of benzene molecules desorbed from the liquid microjet by a 1.9 μm laser pulse is 82 ± 5 K. However, in both cases careful inspection of the spectral profiles shows that the experimental rotational distributions are non-Boltzmann, displaying an underpopulation of high rotational states and a relative overpopulation of the low rotational states. The non-equilibrium evaporation and desorption spectral profiles are consistent with a model that involves transfer of internal energy into translation upon liberation from the condensed phase.
Description: Copyright © 2006 CSIRO
DOI: 10.1071/CH05319
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Appears in Collections:Aurora harvest
Chemistry publications
Environment Institute publications

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