High Energy Chemistry

, Volume 34, Issue 5, pp 315–319 | Cite as

Stepwise photoionization of 1,2- dimethoxybenzene vapor

  • M. E. Akopyan
  • V. I. Kleimenov
  • M. V. Kleimenov
  • A. G. Feofilov
Laser Chemistry


Processes of stepwise ionization of 1,2-dimethoxybenzene vapor by radiation in the range 295-275 nm were studied by the techniques of total current spectroscopy, mass spectrometry, electronic absorption spectroscopy, and threshold electron spectroscopy. A two-step ionization process via the first electronically excited state of the molecule yielding the molecular ion was found to prevail at an average laser radiation intensity less than 106 W/cm2. Molecular ions possess a considerable (up to 1 eV) vibrational excitation energy. As the radiation intensity increases, the progressively stronger and deeper degradation takes place via dissociation of molecular and, probably, fragment ions due to absorption of at least one additional photon.


High Energy Chemistry Laser Radiation Intensity Stepwise Ionization Laser Photoionization Radiation Intensity Increase 
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  1. 1.
    Letokhov, V.S.,Lazernaya fotoionizatsionnaya spektroskopiya (Laser Photoionization Spectroscopy), Moscow: Nauka, 1987.Google Scholar
  2. 2.
    Akopyan, M.E., Kleimenov, V.I., and Feofilov, A.G.,Khim. Vys. Energ., 2000, vol. 34, no. 2, p. 149 [High Energy Chem. (Engl. transl.) 2000, vol. 34, no. 2, p. 107].Google Scholar
  3. 3.
    Breen, P.J., Bernstein, E.R., Secor, H.V., and Seeman, J.I.,J. Am. Chem. Soc., 1989, vol. 111, no. 6, p. 1959.CrossRefGoogle Scholar
  4. 4.
    Akopyan, M.E., Ivanov, V.S., Kleimenov, V.I., and Feofilov, A.G.,Opt. Spektrosk., 1999, vol. 86, no. 6, p. 978.Google Scholar
  5. 5.
    Kleimenov, M.V., Sukhov, D.A., Kleimenov, V.I., and Andreev, VA.,Khim. Drev., 1992, no. 6, p. 49.Google Scholar
  6. 6.
    Takhistov, V.V.,Organicheskaya mass-spektrometriya (Organic Mass Spectrometry), Leningrad: Nauka, 1990.Google Scholar
  7. 7.
    Ponomarev, D.A., Takhistov, V.V., Misharev, A.D., and Orlov, V.M.,Zh. Obshch. Khim., 1994, vol. 64, no. 6, p. 1006.Google Scholar
  8. 8.
    Polevoi, A.V., Matyuk, V.M., and Potapov, V.K.,Khim. Vys. Energ., 1995, vol. 29, no. 3, p. 165 [High Energy Chem. (Engl. transl.) 1995, vol. 29, no. 3, p 147].Google Scholar
  9. 9.
    Lemaire, J., Dimicoli, L., and Botter, R.,Chem. Phys., 1987, vol. 115, no. 1,p. 129.CrossRefGoogle Scholar
  10. 10.
    Chang Ta-Chau, and Johnston, M.V,J. Phys. Chem., 1987, vol. 91, no. 4, p. 884.CrossRefGoogle Scholar
  11. 11.
    Stiller, S.W. and Johnston, M.V.,J. Phys. Chem., 1985, vol. 89, no. 13, p. 2717.CrossRefGoogle Scholar
  12. 12.
    Florencio, H., Heerma, W., and Vijfhuizen, P.C.,Org. Mass Spectrom., 1978, vol. 13, no. 12, p. 735.CrossRefGoogle Scholar
  13. 13.
    Meot-Ner, M.,J. Phys. Chem., 1980, vol. 84, no. 21, p. 27160.Google Scholar
  14. 14.
    Stull, D., Westrum, E., and Sinke, G.,The Chemical Thermodynamics of Organic Compounds, New York: Wiley, 1969. Translated under the titleKhimicheskaya termodinamika organicheskikh soedinenii, Moscow: Mir, 1971.Google Scholar
  15. 15.
    Levin, R.D. and Lias, S.G.,Ionization Potential and Appearance Potential Measurements, Washington, DC: U.S. Natl. Bur. Stand., 1982, p. 193.Google Scholar
  16. 16.
    Terent’ev, P.B.,Mass-spektrometriya vorganicheskoi khimii (Mass Spectrometry in Organic Chemistry), Moscow: Vysshaya Shkola, 1979, p. 109.Google Scholar
  17. 17.
    Xian Zhong, and Bozzelli, J.W.,J. Phys. Chem., 1998, vol. 102, no. 20, p. 3537.Google Scholar

Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • M. E. Akopyan
    • 1
  • V. I. Kleimenov
    • 1
  • M. V. Kleimenov
    • 1
  • A. G. Feofilov
    • 1
  1. 1.Research Institute of PhysicsSt. Petersburg State UniversitySt. PetersburgRussia

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