High Energy Chemistry

, Volume 53, Issue 1, pp 58–65 | Cite as

Dissociation of Molecular Negative Ions of Tetracyanoquinodimethane at the Ionization-Chamber Surface upon Resonance Electron Capture

  • L. Z. KhatymovaEmail author
  • V. G. Lukin
  • G. M. Tuimedov
  • O. G. Khvostenko


The mass spectrum of negative ions due to resonance electron capture by molecules of tetracyanoquinodimethane (TCNQ), a well-known electron acceptor, has been recorded in order to identify the dissociation processes of TCNQ molecular negative ions on the surface of an ionization chamber at thermal energies of electrons to be attached to the molecules. It has been found that the TCNQ molecular negative ions, preliminarily generated in the gas phase at several resonance maxima, reach the ionization chamber walls owing to a long extra-electron autodetachment lifetime ranging from 25 s in the first resonance at zero electron energy to 0.2 s in the resonance at 3.3 eV and dissociate at the walls as a result of the influence of the surface on the energy balance of the dissociation process. It has been taken into account that without the surface effect on the energy balance, this dissociation would be impossible because of an insufficient energy of the electron captured by the molecule. By B3LYP/6-311G calculations, the most probable dissociation pathways have been determined for negative fragment ions with various empirical formulas. The data obtained can be used to solve problems related to the properties of the TCNQ molecule in interaction with the conductive surface of a metal substrate in electronic devices.


tetracyanoquinodimethane resonance electron capture by molecules surface dissociation of molecular negative ions 



This work was supported in part by the Russian Foundation for Basic Research and the Administration of the Republic of Bashkortostan, project no. 17-42-020643.


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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • L. Z. Khatymova
    • 1
    Email author
  • V. G. Lukin
    • 1
  • G. M. Tuimedov
    • 1
  • O. G. Khvostenko
    • 1
  1. 1.Institute of Molecule and Crystal Physics, Ufa Federal Research Center, Russian Academy of SciencesUfaRussia

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