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Temperature-dependent kinetics of the quenching of O(1S) by simple alkanes, C2H2 and C2H4

✍ Scribed by S. Höser; F.P. Capetanakis; Ch. Kassner; F. Stuhl

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
450 KB
Volume
208
Category
Article
ISSN
0009-2614

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✦ Synopsis

The kinetics of the quenching of 0( 'S) atoms by a number of simple alkanes, C2H2 and CzH4, was studied in the temperature range from 215 to 435 K. The metastable atoms were produced in the pulsed 121.6 nm photolysis of N20 and detected by the forbidden transition O('S-+'D) enhanced by exciplex formation in the presence of Ar. The measured rate constants increase markedly with the complexily of the alkanes by more than five orders of magnitude from CH, to n-CSH,, and are large for the simplest unsaturated hydrocarbons &HZ and C2H+ The temperature dependences of the constants generally are small and exhibit all types of behavior such as Arrhenius, non-Arrhenius, negative temperature coeflicient, and independence of temperature.

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