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Electron-induced chemistry in microhydrated sulfuric acid clusters

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00482678" target="_blank" >RIV/61388955:_____/17:00482678 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.5194/acp-17-14171-2017" target="_blank" >http://dx.doi.org/10.5194/acp-17-14171-2017</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.5194/acp-17-14171-2017" target="_blank" >10.5194/acp-17-14171-2017</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Electron-induced chemistry in microhydrated sulfuric acid clusters

  • Original language description

    We investigate the mixed sulfuric acid-water clusters in a molecular beam experiment with electron attachment and negative ion mass spectrometry and complement the experiment by density functional theory (DFT) calculations. The microhydration of (H2SO4)(m)(H2O)(n) clusters is controlled by the expansion conditions, and the electron attachment yields the main cluster ion series (H2SO4)(m)(H2O)(n)HSO4- and (H2O)(n)H2SO4-. The mass spectra provide an experimental evidence for the onset of the ionic dissociation of sulfuric acid and ion-pair (HSO4-center dot center dot center dot H3O+) formation in the neutral H2SO4(H2O)(n) clusters with n >= 5 water molecules, in excellent agreement with the theoretical predictions. In the clusters with two sulfuric acid molecules (H2SO4)(2)(H2O)(n) this process starts as early as n >= 2 water molecules. The (H2SO4)(m) (H2O)(n)HSO4 clusters are formed after the dissociative electron attachment to the clusters containing the (HSO4-center dot center dot center dot H3O+) ion-pair structure, which leads to the electron recombination with the H3O+ moiety generating H2O molecule and the H-atom dissociation from the cluster. The (H2O)(n) H2SO4- cluster ions point to an efficient caging of the H-atom by the surrounding water molecules. The electron-energy dependencies exhibit an efficient electron attachment at low electron energies below 3 eV, and no resonances above this energy, for all the measured mass peaks. This shows that in the atmospheric chemistry only the low-energy electrons can be efficiently captured by the sulfuric acid-water clusters and converted into the negative ions. Possible atmospheric consequences of the acidic dissociation in the clusters and the electron attachment to the sulfuric acid-water aerosols are discussed.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

    <a href="/en/project/GA17-04068S" target="_blank" >GA17-04068S: Molecular Clusters as Unique Nano-reactors: Controlling Chemistry with Photons and Electrons</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Atmospheric Chemistry and Physics

  • ISSN

    1680-7324

  • e-ISSN

  • Volume of the periodical

    17

  • Issue of the periodical within the volume

    22

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    10

  • Pages from-to

    14171-14180

  • UT code for WoS article

    000416439400001

  • EID of the result in the Scopus database

    2-s2.0-85035801941