Electrospray Mass Spectrometric Detection of Products and Short-Lived Intermediates in Aqueous Aerosol Microdroplets Exposed to a Reactive Gas

Electrospray Mass Spectrometric Detection of Products and Short-Lived Intermediates in Aqueous Aerosol Microdroplets Exposed to a Reactive Gas

The intermediates ISO sub(3) super(-) (m/z = 207) and IS sub(2)O sub(3) super(- ) (m/z = 239) generated in aqueous (NaI/Na sub(2)S sub(2)O sub(3)) microdroplets traversing dilute O sub(3) gas plumes are detected via online electrospray mass spectrometry within similar to 1 ms, and their stabilities...

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Veröffentlicht in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2007-12, Vol.111 (50), p.13032-13037
Hauptverfasser: Enami, S, Vecitis, C D, Cheng, J, Hoffmann, M R, Colussi, A J
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container_issue 50
container_start_page 13032
container_title The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory
container_volume 111
creator Enami, S
Vecitis, C D
Cheng, J
Hoffmann, M R
Colussi, A J
description The intermediates ISO sub(3) super(-) (m/z = 207) and IS sub(2)O sub(3) super(- ) (m/z = 239) generated in aqueous (NaI/Na sub(2)S sub(2)O sub(3)) microdroplets traversing dilute O sub(3) gas plumes are detected via online electrospray mass spectrometry within similar to 1 ms, and their stabilities gauged by collisionally induced dissociation. The simultaneous detection of anionic reactants and the S sub(2)O sub(6) super(2-), HSO sub(4) super(-), IO sub(3) super(-), and I sub(3) super(-) products as a function of experimental conditions provides evidence of genuinely interfacial reaction kinetics. Although O sub(3)(aq) reacts about 3 times faster with I super(-) than with S sub(2)O sub(3) super(2-) in bulk solution, only S sub(2)O sub(3) super(2-) is significantly depleted in the interfacial layers of [I super(-)]/[S sub(2)O sub(3) super(2-)] = 10 microdroplets below [O sub(3)(g)] similar to 50 ppm.
doi_str_mv 10.1021/jp075505rPII:S1089-5639(07)05505-3
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title Electrospray Mass Spectrometric Detection of Products and Short-Lived Intermediates in Aqueous Aerosol Microdroplets Exposed to a Reactive Gas
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