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Dynamics of interfacial reactions between O(³P) atoms and long-chain liquid hydrocarbons

  • Recent progress that has been made towards understanding the dynamics of collisions at the gas–liquid interface is summarized briefly. We describe in this context a promising new approach to the experimental study of gas–liquid interfacial reactions that we have introduced. This is based on laser-photolytic production of reactive gas-phase atoms above the liquid surface and laser-spectroscopic probing of the resulting nascent products. This technique is illustrated for reaction of O(³P) atoms at the surface of the long-chain liquid hydrocarbon squalane (2,6,10,15,19,23-hexamethyltetracosane). Laser-induced fluorescence detection of the nascent OH has revealed mechanistically diagnostic correlations between its internal and translational energy distributions. Vibrationally excited OH molecules are able to escape the surface. At least two contributions to the product rotational distributions are identified, confirming and extending previous hypotheses of the participation of both direct and trapping-desorption mechanisms. We speculate briefly on future experimental and theoretical developments that might be necessary to address the many currently unanswered mechanistic questions for this, and other, classes of gas–liquid interfacial reaction.

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    This is the Accepted Manuscript version of an article accepted for publication in Physica Scripta. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/0031-8949/76/3/n06.

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Metadaten
Author:Allan Mhairi, Paul A. J. BagotORCiD, Sven P. K. KöhlerORCiD, Stewart K. Reed, Robin E. WestacottORCiD, Matthew L. CostenORCiD, Kenneth G. McKendrickORCiD
URN:urn:nbn:de:bsz:960-opus4-22956
DOI:https://doi.org/10.25968/opus-2295
DOI original:https://doi.org/10.1088/0031-8949/76/3/n06
ISSN:1402-4896
Parent Title (English):Physica Scripta
Document Type:Article
Language:English
Year of Completion:2007
Publishing Institution:Hochschule Hannover
Release Date:2022/06/15
GND Keyword:Gas-Flüssigkeit-System; Laserphotolyse; Hydroxide
Volume:76
Issue:3
Page Number:20
Institutes:Fakultät II - Maschinenbau und Bioverfahrenstechnik
DDC classes:660 Technische Chemie
Licence (German):License LogoUrheberrechtlich geschützt