Variable temperature rate studies for the reaction H3O + + (C2H2)2 measured with a coaxial molecular beam radio frequency ring electrode ion trap

Mark A. Smith, Bing Yuan, Andrei M Sanov

Research output: Contribution to journalArticle

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Abstract

The independent molecule and ion temperature dependence of the rate coefficient for the H3O+ and (C2H 2)2 reaction producing C2H5O + are determined using a coaxial molecular beam radio frequency ring electrode ion trap (CoMB-RET). The H3O+ temperature is varied from 25 to 170 K, while the equilibrated C2H 2/(C2H2)2 beam temperatures sampled are 160, 180, 200, and 220 K. The rate coefficient of the H3O + + (C2H2)2 reaction is determined to be 4.0 × 10-10 × (Treact/300) -2.5 in the reaction temperature range of Treact = 114-187 K. The H3O+ and C2H2 radiative association reaction is found to have a rate coefficient below 1 × 10 -13 cm3·s-1 at 187 K. This result is consistent with Herbst's experimental determination.

Original languageEnglish (US)
Pages (from-to)9466-9472
Number of pages7
JournalJournal of Physical Chemistry A
Volume116
Issue number38
DOIs
StatePublished - Sep 27 2012

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Molecular beams
molecular beams
radio frequencies
Ions
Electrodes
electrodes
rings
coefficients
association reactions
Temperature
temperature
ion temperature
Association reactions
temperature dependence
Molecules
molecules

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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Variable temperature rate studies for the reaction H3O + + (C2H2)2 measured with a coaxial molecular beam radio frequency ring electrode ion trap. / Smith, Mark A.; Yuan, Bing; Sanov, Andrei M.

In: Journal of Physical Chemistry A, Vol. 116, No. 38, 27.09.2012, p. 9466-9472.

Research output: Contribution to journalArticle

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abstract = "The independent molecule and ion temperature dependence of the rate coefficient for the H3O+ and (C2H 2)2 reaction producing C2H5O + are determined using a coaxial molecular beam radio frequency ring electrode ion trap (CoMB-RET). The H3O+ temperature is varied from 25 to 170 K, while the equilibrated C2H 2/(C2H2)2 beam temperatures sampled are 160, 180, 200, and 220 K. The rate coefficient of the H3O + + (C2H2)2 reaction is determined to be 4.0 × 10-10 × (Treact/300) -2.5 in the reaction temperature range of Treact = 114-187 K. The H3O+ and C2H2 radiative association reaction is found to have a rate coefficient below 1 × 10 -13 cm3·s-1 at 187 K. This result is consistent with Herbst's experimental determination.",
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