HSO2+ Formation from Ion‐Molecule Reactions of SO2⋅+ with Water and Methane: Two Fast Reactions with Reverse Temperature‐Dependent Kinetic Trend

Cartoni, Antonella; Catone, Daniele; Bolognesi, P.; Satta, Mauro; Markus, Pal; Avaldi, L.

doi:10.1002/chem.201700028

Cited by 23 publications

(50 citation statements)

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“…This work follows recent studies on ion‐molecule reactions, and on the dynamic of the Hydrogen Atom Transfer (HAT) reaction of sulfur dioxide radical cation

S O_{2}^{+}

with methane and water leading to

H S O_{2}^{+}

ions and CH 3 or OH , which is a relevant oxidant in the environmental chemistry . The ionic product of these reactions,

H S O_{2}^{+}

has been detected in the terrestrial stratosphere with other sulfur oxides protonated species and reacts with water via proton transfer . The title reaction (eq.…”

Section: Introductionmentioning

confidence: 92%

“…The title reaction (eq. 1) has been studied experimentally using tunable synchrotron radiation to produce

S O_{2}^{+}

in the excited ro‐vibrational levels of the ionic ground state:

true S O_{2}^{+} + H_{2} \to H S O_{2}^{+} + H

…”

Section: Introductionmentioning

confidence: 99%

“…Eq. 1, together with the efficient reaction of

S O_{2}^{+}

with water, is a nighttime alternative pathway to the sunlight formation of OH . The main source of OH during daytime is the reactions of water (eq.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, alternative oxidation pathways leading to sulfuric acid have been investigated, and ionic mechanisms seem to be operative during the night due to ionizing radiation . Hence, the OH produced by the reactions of

S O_{2}^{+}

with H 2 , and also with water

((), S O_{2}^{+} + H_{2} O \to H S O_{2}^{+} + O H)

, should be considered as potential relevant ionic processes of H 2 SO 4 aerosol formation during nighttime, and should be tested in the atmospheric models. OH can oxidize SO 2 to HSO 3 , triggering the chemical reactions network leading to the formation of H 2 SO 4 aerosol in the stratosphere, which in turn could modify the expected size distribution of the particulates with consequences on the global expected cooling effects.…”

Section: Introductionmentioning

confidence: 99%

“…The same study has been repeated with the D 2 molecule. Moreover, a comparison with the reaction of

S O_{2}^{+}

with water and methane, as well as other previous ion‐molecule reaction studies of

S O_{2}^{+}

and

C H_{4}^{+}

with hydrogen, has been carried out …”

Section: Introductionmentioning

confidence: 99%

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The Reaction of Sulfur Dioxide Radical Cation with Hydrogen and its Relevance in Solar Geoengineering Models

et al. 2020

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SO2 has been proposed in solar geoengineering as a precursor of H2SO4 aerosol, a cooling agent active in the stratosphere to contrast climate change. Atmospheric ionization sources can ionize SO2 into excited states of SO2·+ , which quickly reacts with trace gases in the stratosphere. In this work we explore the reaction of H2D2 with SO2·+ excited by tunable synchrotron radiation, leading to HSO2++H (DSO2++D ), where H contributes to O3 depletion and OH formation. Density Functional Theory and Variational Transition State Theory have been used to investigate the dynamics of the title barrierless and exothermic reaction. The present results suggest that solar geoengineering models should test the reactivity of SO2·+ with major trace gases in the stratosphere, such as H2 since this is a relevant channel for the OH formation during the nighttime when there is not OH production by sunlight. OH oxides SO2, triggering the chemical reactions leading to H2SO4 aerosol.

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“…This work follows recent studies on ion‐molecule reactions, and on the dynamic of the Hydrogen Atom Transfer (HAT) reaction of sulfur dioxide radical cation

S O_{2}^{+}

with methane and water leading to

H S O_{2}^{+}

ions and CH 3 or OH , which is a relevant oxidant in the environmental chemistry . The ionic product of these reactions,

H S O_{2}^{+}

has been detected in the terrestrial stratosphere with other sulfur oxides protonated species and reacts with water via proton transfer . The title reaction (eq.…”

Section: Introductionmentioning

confidence: 92%

“…The title reaction (eq. 1) has been studied experimentally using tunable synchrotron radiation to produce

S O_{2}^{+}

in the excited ro‐vibrational levels of the ionic ground state:

true S O_{2}^{+} + H_{2} \to H S O_{2}^{+} + H

…”

Section: Introductionmentioning

confidence: 99%

“…Eq. 1, together with the efficient reaction of

S O_{2}^{+}

with water, is a nighttime alternative pathway to the sunlight formation of OH . The main source of OH during daytime is the reactions of water (eq.…”

Section: Introductionmentioning

confidence: 99%