Atmospheric oxidation of reduced sulfur species

Tyndall, Geoffrey S.; Ravishankara, A. R.

doi:10.1002/kin.550230604

Cited by 302 publications

(264 citation statements)

References 115 publications

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“…These results suggest different formation pathways for sulfate and nitrate. Particle-phase sulfate resulted predominantly from sulfur dioxide oxidation in the cloud free atmosphere (Tyndall and Ravishankara, 1991) and, more commonly, SO 2 conversion in clouds and fogs (Gurciullo and Pandis, 1997;Zhang et al, 1999). The preferential enrichment of nitrate in inorganic ions-rich particles was evidence of a predominant gas-phase source for nitric acid and precursors, followed by partitioning and heterogeneous/aqueous chemistry.…”

Section: Mixing State Of Biomass Burning Particles With Secondary Spementioning

confidence: 99%

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Bi¹,

Zhang²,

Li³

et al. 2011

Atmospheric Environment

165

108

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Section: Mixing State Of Biomass Burning Particles With Secondary Spementioning

confidence: 99%

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Bi¹,

Zhang²,

Li³

et al. 2011

Atmospheric Environment

165

108

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“…The exact mechanism of forming the sulfinyl radical from free thiol is not clear. Based on the radical reactions of organic thiols, it can be a chain-reaction,in which thiyl radical is formed first due to hydrogen abstraction by hydroxyl radical and then quickly oxidized to sulfinyl radical [53]. Molecular oxygen and NO 2 were reported to be involved in the oxidation process of thiyl radicals [6].…”

Section: Radical Attack Of Free Cysteine Residuementioning

confidence: 99%

“…Small organic sulfinyl radicals, such as HSO• and CH 3 SO•, are important products for oxidation of pollutants like H 2 S and CH 3 SH, as well as photolysis of sulfoxide, and thus play an important role in the atmospheric sulfur cycles [52][53][54]. Protein sulfinyl radicals have been detected by electron spin resonance spectroscopy for glycyl-radical enzyme system upon its exposure to molecular oxygen [55,56].…”

mentioning

confidence: 99%

Gas-Phase Peptide Sulfinyl Radical Ions: Formation and Unimolecular Dissociation

Tan

Xia

2012

J. Am. Soc. Mass Spectrom.

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A variety of peptide sulfinyl radical (RSO•) ions with a well-defined radical site at the cysteine side chain were formed at atmospheric pressure (AP), sampled into a mass spectrometer, and investigated via collision-induced dissociation (CID). The radical ion formation was based on AP reactions between oxidative radicals and peptide ions containing single inter-chain disulfide bond or free thiol group generated from nanoelectrospray ionization (nanoESI). The radical induced reactions allowed large flexibility in forming peptide radical ions independent of ion polarity (protonated or deprotonated) or charge state (singly or multiply charged). More than 20 peptide sulfinyl radical ions in either positive or negative ion mode were subjected to low energy collisional activation on a triple-quadrupole/linear ion trap mass spectrometer. The competition between radical-and charge-directed fragmentation pathways was largely affected by the presence of mobile protons. For peptide sulfinyl radical ions with reduced proton mobility (i.e., singly protonated, containing basic amino acid residues), loss of 62 Da (CH 2 SO), a radicalinitiated dissociation channel, was dominant. For systems with mobile protons, this channel was suppressed, while charge-directed amide bond cleavages were preferred. The polarity of charge was found to significantly alter the radical-initiated dissociation channels, which might be related to the difference in stability of the product ions in different ion charge polarities.

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“…Most reactivity studies have been carried out with mixing ratios of CS 2 and .OH in large excess of ambient levels. It has been suggested that oxidation with .OH in air may also involve two oxygen molecules [Tyndall and Ravishankara, 1991 Photon flux, necessary lbr quantum yield measurements, was quantified with ferrioxalate actinometry [Hatchard and Parker, 1956;Parker, 1953] UV-VIS spectra were taken with either an IBM 9420 UV-VIS spectrophotometer or a Hewlett Packard 8452A diode army spectrometer. Quantum yields measurements employed UV-VIS analysis, and a 2.5 cm diameter, 10 cm length Pyrex cell fitted with quartz windows and a Teflon stopcock.…”

Section: With the Diumally Averaged Value For [Oh] Taken As 8x105mentioning

confidence: 99%

The long‐wavelength photochemistry of carbon disulfide

Colman¹,

Trogler²

1997

J. Geophys. Res.

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Abstract. The photochemistry of carbon disulfide was examined over a concentration range that pertains to tropospheric conditions. At low mixing ratios (67.79, 282.4, and 485.4 parts per billion by volume (ppbv)) in air, photochemical oxidation is very slow and carbonyl sulfide (OCS) product was not observed. Upper limits were established for the quantum yield based on a practical OCS quantification limit of 10 ppbv (•OC8 < 0.0022, 0.00079, and 0.00045, respectively). Solar photolysis at a mixing ratio of 282.4 ppbv gave •OC8 < 0.00065. At mixing ratios between 13 and 223.6 parts per million by volume (ppmv), •OC8 increases linearly with PCS2 from 0.001 to 0.01. The d•CS2, •OC8, and •CO measured did not depend significantly on the light intensity employed, which argues against the involvement of two-photon processes. At high PCS2 (above 3 toro •cs2, •ocs, and •co were independent of PCS2. This behavior resembles that observed for photopolymerization of CS2 in the absence of oxygen. Carbon monoxide, observed at mixing ratios as low as 72.0 ppmv, forms by photodegradation of (CS2)x polymer that has previously photoincorporated oxygen. Photopolymerization under a nitrogen atmosphere was also first-order in CS2 with quanttun yields of 0.0027, 0.0036, and 0.0063 at 74.83, 145.1, and 297.2 ppmv, respectively. Both photopolymerization and photooxidation appear to cease below about 1 ppmv. This is the behavior expected from a bimolecular reaction involving a long-lived excited state (CS2") that is necessary for particle growth. Regardless of the mechanism of photooxidation, the observed quantum yields are too small to compete with hydroxyl-initiated oxidation of CS2 at tropospheric mixing ratios.

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Atmospheric oxidation of reduced sulfur species

Cited by 302 publications

References 115 publications

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Gas-Phase Peptide Sulfinyl Radical Ions: Formation and Unimolecular Dissociation

The long‐wavelength photochemistry of carbon disulfide

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