Abstract
We have employed a pulsed laser photolysis-pulsed laser induced fluorescence technique to study the kinetics and mechanism of the reaction of OH with dimethylsulfoxide and its deuterated analogue. A rate coefficient of (1.0 ± 0.3) x 10-10 cm3 molecule-1 s-1 was obtained at room temperature. The rate coefficient was independent of pressure over the range 25-700 Torr, showed no dependence on the nature of the buffer gas and showed no kinetic isotope effect. A limited study of the temperature dependence indicated that the reaction displays a negative activation energy. The gas phase ultraviolet absorption spectrum was obtained at room temperature and showed a strong absorption feature in the far ultraviolet. The absolute absorption cross-section at 205 nm, the absorption peak, is (1.0 ± 0.3) x 10--17 cm2, where the large uncertainty results from experimental difficulties associated with the low vapor pressure and 'stickiness' of DMSO.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 23-37 |
| Number of pages | 15 |
| Journal | Journal of Atmospheric Chemistry |
| Volume | 24 |
| Issue number | 1 |
| State | Published - 1996 |
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Keywords
- Dimethylsulfoxide
- Hydroxyl radical
- Kinetics
- Sulfur cycle
ASJC Scopus subject areas
- Atmospheric Science
- Environmental Science(all)
- Environmental Chemistry
- Earth and Planetary Sciences(all)
Cite this
The atmospheric chemistry of dimethylsulfoxide (DMSO) kinetics and mechanism of the OH + DMSO reaction. / Hynes, Anthony J; Wine, P. H.
In: Journal of Atmospheric Chemistry, Vol. 24, No. 1, 1996, p. 23-37.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The atmospheric chemistry of dimethylsulfoxide (DMSO) kinetics and mechanism of the OH + DMSO reaction
AU - Hynes, Anthony J
AU - Wine, P. H.
PY - 1996
Y1 - 1996
N2 - We have employed a pulsed laser photolysis-pulsed laser induced fluorescence technique to study the kinetics and mechanism of the reaction of OH with dimethylsulfoxide and its deuterated analogue. A rate coefficient of (1.0 ± 0.3) x 10-10 cm3 molecule-1 s-1 was obtained at room temperature. The rate coefficient was independent of pressure over the range 25-700 Torr, showed no dependence on the nature of the buffer gas and showed no kinetic isotope effect. A limited study of the temperature dependence indicated that the reaction displays a negative activation energy. The gas phase ultraviolet absorption spectrum was obtained at room temperature and showed a strong absorption feature in the far ultraviolet. The absolute absorption cross-section at 205 nm, the absorption peak, is (1.0 ± 0.3) x 10--17 cm2, where the large uncertainty results from experimental difficulties associated with the low vapor pressure and 'stickiness' of DMSO.
AB - We have employed a pulsed laser photolysis-pulsed laser induced fluorescence technique to study the kinetics and mechanism of the reaction of OH with dimethylsulfoxide and its deuterated analogue. A rate coefficient of (1.0 ± 0.3) x 10-10 cm3 molecule-1 s-1 was obtained at room temperature. The rate coefficient was independent of pressure over the range 25-700 Torr, showed no dependence on the nature of the buffer gas and showed no kinetic isotope effect. A limited study of the temperature dependence indicated that the reaction displays a negative activation energy. The gas phase ultraviolet absorption spectrum was obtained at room temperature and showed a strong absorption feature in the far ultraviolet. The absolute absorption cross-section at 205 nm, the absorption peak, is (1.0 ± 0.3) x 10--17 cm2, where the large uncertainty results from experimental difficulties associated with the low vapor pressure and 'stickiness' of DMSO.
KW - Dimethylsulfoxide
KW - Hydroxyl radical
KW - Kinetics
KW - Sulfur cycle
UR - http://www.scopus.com/inward/record.url?scp=0029663015&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029663015&partnerID=8YFLogxK
M3 - Article
VL - 24
SP - 23
EP - 37
JO - Journal of Atmospheric Chemistry
JF - Journal of Atmospheric Chemistry
SN - 0167-7764
IS - 1
ER -