Abstract
We report that rates of I2(g) emissions, measured via cavity ring-down spectroscopy, during the heterogeneous ozonation of interfacial iodide: I-(surface, s) + O3(g) + H+(s) →→ I2(g), are enhanced several-fold, whereas those of IO · (g) are unaffected, by the presence of undissociated alkanoic acids on water. The amphiphilic weak carboxylic acids appear to promote I2(g) emissions by supplying the requisite interfacial protons H+(s) more efficiently than water itself, at pH values representative of submicrometer marine aerosol particles. We infer that the organic acids coating aerosol particles ejected from oceans topmost films should enhance I2(g) production in marine boundary layers.
| Original language | English |
|---|---|
| Pages (from-to) | 4935-4940 |
| Number of pages | 6 |
| Journal | Journal of Physical Chemistry A |
| Volume | 115 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - May 19 2011 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
Cite this
Weak acids enhance halogen activation on atmospheric waters surfaces. / Hayase, Sayaka; Yabushita, Akihiro; Kawasaki, Masahiro; Enami, Shinichi; Hoffmann, Michael R.; Colussi, Agustín J.
In: Journal of Physical Chemistry A, Vol. 115, No. 19, 19.05.2011, p. 4935-4940.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Weak acids enhance halogen activation on atmospheric waters surfaces
AU - Hayase, Sayaka
AU - Yabushita, Akihiro
AU - Kawasaki, Masahiro
AU - Enami, Shinichi
AU - Hoffmann, Michael R.
AU - Colussi, Agustín J.
PY - 2011/5/19
Y1 - 2011/5/19
N2 - We report that rates of I2(g) emissions, measured via cavity ring-down spectroscopy, during the heterogeneous ozonation of interfacial iodide: I-(surface, s) + O3(g) + H+(s) →→ I2(g), are enhanced several-fold, whereas those of IO · (g) are unaffected, by the presence of undissociated alkanoic acids on water. The amphiphilic weak carboxylic acids appear to promote I2(g) emissions by supplying the requisite interfacial protons H+(s) more efficiently than water itself, at pH values representative of submicrometer marine aerosol particles. We infer that the organic acids coating aerosol particles ejected from oceans topmost films should enhance I2(g) production in marine boundary layers.
AB - We report that rates of I2(g) emissions, measured via cavity ring-down spectroscopy, during the heterogeneous ozonation of interfacial iodide: I-(surface, s) + O3(g) + H+(s) →→ I2(g), are enhanced several-fold, whereas those of IO · (g) are unaffected, by the presence of undissociated alkanoic acids on water. The amphiphilic weak carboxylic acids appear to promote I2(g) emissions by supplying the requisite interfacial protons H+(s) more efficiently than water itself, at pH values representative of submicrometer marine aerosol particles. We infer that the organic acids coating aerosol particles ejected from oceans topmost films should enhance I2(g) production in marine boundary layers.
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U2 - 10.1021/jp2021775
DO - 10.1021/jp2021775
M3 - Article
VL - 115
SP - 4935
EP - 4940
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 19
ER -