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Dissociative electron attachment to dinitrogen pentoxide, N2O5.

P Cicman1, G A Buchanan, G Marston

  • 1Institut für Ionenphysik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria.

The Journal of Chemical Physics
|November 20, 2004
PubMed
Summary
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Electron attachment to dinitrogen pentoxide (N2O5) gas efficiently produces various negative ions, including nitrate and nitrite. These findings reveal complex fragmentation dynamics in N2O5.

Area of Science:

  • Physical Chemistry
  • Chemical Physics
  • Gas-Phase Ion Chemistry

Background:

  • Dinitrogen pentoxide (N2O5) is a key species in atmospheric chemistry, but its electron attachment properties are not well understood.
  • Understanding electron interactions with N2O5 is crucial for modeling atmospheric processes and chemical reactions.

Purpose of the Study:

  • To investigate electron attachment processes in gaseous dinitrogen pentoxide (N2O5).
  • To identify and characterize the anionic fragments produced from N2O5 upon electron impact.
  • To determine the efficiency of electron attachment to N2O5.

Main Methods:

  • Experiments were conducted using incident electrons with energies ranging from a few meV to 10 eV.
  • Quadrupole mass spectrometry was employed to detect and identify anionic fragments.

Related Experiment Videos

  • Cross sections for fragment production were estimated.

    • Main Results:

    • No stable parent N2O5 anion was observed.
    • Anionic fragments including NO3-, NO2-, NO-, O-, and O2- were detected.
    • Dissociative electron attachment pathways were found to be coupled, offering insights into N2O5 fragmentation dynamics.
    • Electron attachment to N2O5 was found to be highly efficient, comparable to other non-halogenated polyatomic systems.

    Conclusions:

    • Electron attachment to N2O5 leads to significant fragmentation into smaller anions.
    • The observed fragmentation patterns provide detailed information on the dynamics of N2O5 decomposition.
    • N2O5 exhibits a high cross-section for electron attachment, indicating its reactivity in electron-rich environments.