Kinetics for the reactions of O - and O 2 - with O 2(a 1 Δ 8) measured in a selected ion flow tube at 300 K

Anthony Midey; Itzhak Dotan; S. Lee; W. T. Rawlins; Mark A. Johnson; A. A. Viggiano

doi:10.1021/jp071304b

Kinetics for the reactions of O ^- and O ₂ ^- with O ₂(a ¹ Δ ₈) measured in a selected ion flow tube at 300 K

Anthony Midey, Itzhak Dotan, S. Lee, W. T. Rawlins, Mark A. Johnson, A. A. Viggiano

Chemistry discipline

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Abstract

The kinetics of the reactions of O ^- and O ₂ ^- with O ₂(a ¹Δ _g) have been studied at 300 K in a selected ion flow tube (SIFT). The O ₂(a ¹Δ _g) concentrations have been determined using emission at 1270 nm from the O ₂(a ¹Δ _g, v = 0 → X ³σ _g ^-, v = 0) transition measured with an InGaAs detector calibrated against absolute spectrally dispersed emission measurements. The rate constants measured for O ^- and O ₂ ^- are 1.1 × 10 ^-10 and 6.6 × 10 ^-10 cm ³ s ^-1, respectively, with uncertainties of ±35%. The O ₂ ^- reaction only produces electrons and can be described as Penning detachment, while the O ^- reaction has been found to produce both O ₂ ^- and e ^-. The O ₂ ^- branching fraction has a lower limit of ∼0.30. Comparison of the present results to previous measurements found in the literature provides a resolution to a previous discrepancy in the rate constant values.

Original language	English
Pages (from-to)	5218-5222
Number of pages	5
Journal	Journal of Physical Chemistry A
Volume	111
Issue number	24
DOIs	https://doi.org/10.1021/jp071304b
State	Published - 21 Jun 2007

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title = "Kinetics for the reactions of O - and O 2 - with O 2(a 1 Δ 8) measured in a selected ion flow tube at 300 K",

abstract = "The kinetics of the reactions of O - and O 2 - with O 2(a 1Δ g) have been studied at 300 K in a selected ion flow tube (SIFT). The O 2(a 1Δ g) concentrations have been determined using emission at 1270 nm from the O 2(a 1Δ g, v = 0 → X 3σ g -, v = 0) transition measured with an InGaAs detector calibrated against absolute spectrally dispersed emission measurements. The rate constants measured for O - and O 2 - are 1.1 × 10 -10 and 6.6 × 10 -10 cm 3 s -1, respectively, with uncertainties of ±35%. The O 2 - reaction only produces electrons and can be described as Penning detachment, while the O - reaction has been found to produce both O 2 - and e -. The O 2 - branching fraction has a lower limit of ∼0.30. Comparison of the present results to previous measurements found in the literature provides a resolution to a previous discrepancy in the rate constant values.",

author = "Anthony Midey and Itzhak Dotan and S. Lee and Rawlins, {W. T.} and Johnson, {Mark A.} and Viggiano, {A. A.}",

year = "2007",

month = jun,

day = "21",

doi = "10.1021/jp071304b",

language = "אנגלית",

volume = "111",

pages = "5218--5222",

journal = "Journal of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society",

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T1 - Kinetics for the reactions of O - and O 2 - with O 2(a 1 Δ 8) measured in a selected ion flow tube at 300 K

AU - Midey, Anthony

AU - Dotan, Itzhak

AU - Lee, S.

AU - Rawlins, W. T.

AU - Johnson, Mark A.

AU - Viggiano, A. A.

PY - 2007/6/21

Y1 - 2007/6/21

N2 - The kinetics of the reactions of O - and O 2 - with O 2(a 1Δ g) have been studied at 300 K in a selected ion flow tube (SIFT). The O 2(a 1Δ g) concentrations have been determined using emission at 1270 nm from the O 2(a 1Δ g, v = 0 → X 3σ g -, v = 0) transition measured with an InGaAs detector calibrated against absolute spectrally dispersed emission measurements. The rate constants measured for O - and O 2 - are 1.1 × 10 -10 and 6.6 × 10 -10 cm 3 s -1, respectively, with uncertainties of ±35%. The O 2 - reaction only produces electrons and can be described as Penning detachment, while the O - reaction has been found to produce both O 2 - and e -. The O 2 - branching fraction has a lower limit of ∼0.30. Comparison of the present results to previous measurements found in the literature provides a resolution to a previous discrepancy in the rate constant values.

AB - The kinetics of the reactions of O - and O 2 - with O 2(a 1Δ g) have been studied at 300 K in a selected ion flow tube (SIFT). The O 2(a 1Δ g) concentrations have been determined using emission at 1270 nm from the O 2(a 1Δ g, v = 0 → X 3σ g -, v = 0) transition measured with an InGaAs detector calibrated against absolute spectrally dispersed emission measurements. The rate constants measured for O - and O 2 - are 1.1 × 10 -10 and 6.6 × 10 -10 cm 3 s -1, respectively, with uncertainties of ±35%. The O 2 - reaction only produces electrons and can be described as Penning detachment, while the O - reaction has been found to produce both O 2 - and e -. The O 2 - branching fraction has a lower limit of ∼0.30. Comparison of the present results to previous measurements found in the literature provides a resolution to a previous discrepancy in the rate constant values.

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SN - 1089-5639

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JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 24

ER -

Kinetics for the reactions of O ^- and O ₂ ^- with O ₂(a ¹ Δ ₈) measured in a selected ion flow tube at 300 K

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