Advertisement

Chinese Science Bulletin

, Volume 51, Issue 10, pp 1185–1190 | Cite as

Dissociation of NO2 in femtosecond intense fields

  • Zhu Jingyi 
  • Guo Wei 
  • Wang Yanqiu 
  • Wang Li Email author
Articles

Abstract

Experimental investigations on the dissociation and ionization processes of NO2 in intense fields at wavelengths of 810, 405 and 270 nm, are presented. The ratios of NO 2 + /NO+ are found to be independent of the laser intensity at these three wavelengths, but show strong dependence on the wavelengths. Longer wavelength produces a larger parent-ion yield in comparison with 405 nm. Peak profiles of all the fragment ions clearly show little kinetic energy releasing during the dissociation. Fragment ions are suggested to be produced from dissociation of the field ionized parent ions. Our results indicate that laser pulse wavelengths are the most important parameters in ionization-fragmen-tation process of polyatomic molecules in intense field other than the laser intensity.

Keywords

femtosecond laser laser intensity field-induced ionization field-induced dissociation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    DeWitt M J, Levis R J. Near-infrared femtosecond photoionization/dissociation of cyclic aromatic hydrocarbons. J Chem Phys, 1995, 102: 8670–8673CrossRefGoogle Scholar
  2. 2.
    Ledingham K W D, Signal R P. High intensity laser mass spectrometry-a review. Int J Mass Spectrosc and Ion Processes, 1997, 163: 149–168CrossRefGoogle Scholar
  3. 3.
    Ford J V, Hong Q, Pith L, et al. Femtosecond laser interactions with methyl iodide clusters. I. Coulomb explosion at 795 nm. J Chem Phys, 1999, 110: 6257–6267CrossRefGoogle Scholar
  4. 4.
    Vijayalakshmi K, Safvan C P, Kumar G R, et al. On the ionization and dissociation of NO2 by short intense laser pulses. Chem Phys Lett, 1997, 270: 37–44CrossRefGoogle Scholar
  5. 5.
    Schmidt M, Dobosz S, Oliveira P D, et al. Multiple ionization of chlorine in strong laser fields. 1. Post-dissociation ionization. J Phys B: At Mol Opt Phys, 1997, 30: L749–L755CrossRefGoogle Scholar
  6. 6.
    Fuß W, Schmid W E, Trushin S A. Time-resolved dissociative intense-laser field ionization for probing dynamics: Femtosecond photochemical ring opening of 1,3-cyclohexadiene. J Chem Phys, 2000, 112: 8347–8362CrossRefGoogle Scholar
  7. 7.
    Castillejo M, Martin M, Nalda R D, et al. Dissociative ionization of halogenated ethylenes in intense femtosecond laser pulses. Chem Phys Lett, 2002, 353: 295–303CrossRefGoogle Scholar
  8. 8.
    Latychevskaia T Y, Renn A, Wild U P. Higher-order stark effect on single-molecules. Chem Phys, 2002, 282: 109–119CrossRefGoogle Scholar
  9. 9.
    Prall B S, DeWitt M J, Levis R J. Predicting intense field laser ionization probabilities: The application to C2Hn species. J Chem Phys, 1999, 111: 2865–2868CrossRefGoogle Scholar
  10. 10.
    Dietrich P, Corkum P B. Ionization and dissociation of diatomic molecules in intense infrared laser fields. J Chem Phys, 1992, 97(5): 3187–3198CrossRefGoogle Scholar
  11. 11.
    Keldysh L V. Ionization in the field of a strong electromagnetic wave. Sov Phys JETP, 1965, 20: 1307–1314Google Scholar
  12. 12.
    Guo C, Li M, Nibarger J P, et al. Single and double ionization of diatomic molecules in strong laser fields. Phys Rev A, 1998, 58(6): R4271–R4274CrossRefGoogle Scholar
  13. 13.
    Levis R J, Dewitt M J. Photoexcitation, ionization, and dissociation of molecules using intense near-infrared radiation of femtosecond duration. J Phys Chem A, 1999, 103(33): 6493–6507CrossRefGoogle Scholar
  14. 14.
    Harada H, Shimizu S, Yatsuhashi T, et al. A key factor in parent and fragment ion formation on irradiation with a intense femtosecond laser pulse. Chem Phys Lett, 2001, 342: 563–570CrossRefGoogle Scholar
  15. 15.
    Robson L, Ledingham K W D, Tasker A D, et al. Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions. Chem Phys Lett, 2002, 360: 382–389CrossRefGoogle Scholar
  16. 16.
    Ionov P I, Bezel I, Ionov S I, et al. An experimental investigation of the effect of rotation on the rate of unimolecular decomposition of NO2. Chem Phys Lett, 1997, 272: 257–264CrossRefGoogle Scholar
  17. 17.
    Davies J A, LeClaire J E, Continetti R E, et al. Femtosecond time-resolved photoelectron-photoion coincidence imaging studies of dissociation dynamics. J Chem Phys, 1999, 111: 1–4CrossRefGoogle Scholar
  18. 18.
    Singhal R P, Kilic H S, Ledingham K W D, et al. Multiphoton ionisation and dissociation of NO2 by 50 fs laser pulses. Chem Phys Lett, 1996, 253: 81–86CrossRefGoogle Scholar
  19. 19.
    Ledingham K W D, Kosmidis C, Georgious S, et al. A comparison of the femto-, pico-and nano-second multiphoton ionization and dissociation processes of NO2 at 248 and 496 nm. Chem Phys Lett, 1995, 247: 555–563CrossRefGoogle Scholar
  20. 20.
    Singhal R P, Kilic H S, Ledingham K W D, et al. Comment on “On the ionisation and dissociation of NO by short intense laser pulses”. Chem Phys Lett, 1998, 292: 643–646CrossRefGoogle Scholar
  21. 21.
    Kumar G R, Mathur D. Reply to comment on “On the ionization and dissociation of NO by short, intense laser pulses”. Chem Phys Lett, 1998, 292: 647–650CrossRefGoogle Scholar
  22. 22.
    Liu Z H, Wang Y Q, Ma J J, et al. Concerted elimination of CH2I2 and CH2ICl under intense femtosecond laser excitation. Chem Phys Lett, 2004, 383: 198–202CrossRefGoogle Scholar
  23. 23.
    Lezius M, Blanchet V, Rayner D M, et al. Nonadiabatic multielectron dynamics in strong field molecular ionization. Phys Rev Lett, 2001, 86: 51–54CrossRefGoogle Scholar
  24. 24.
    Kilic H S, Ledingham K W D, Kosmidis C, et al. Multiphoton ionization and dissociation of nitromethane using femtosecond laser pulses at 375 and 750 nm. J Phys Chem A, 1997, 101: 817–823CrossRefGoogle Scholar
  25. 25.
    Grun C, Heinicke R, Weickhardt C, et al. The application of ultra-short light pulses for the analysis of quickly relaxing organic molecules by means of laser mass spectrometry. Int J Mass Spectrom, 1999, 187: 307–318CrossRefGoogle Scholar
  26. 26.
    Lopez-Martens R B, Schmidt T W, Roberts G. Femtosecond fluorescence depletion spectroscopy of NO2 multiphoton dissociation dynamics. J Chem Phys, 1999, 111: 7183–7186CrossRefGoogle Scholar
  27. 27.
    Eppink A T J B, Whitaker B J, Gloaguen E, et al. Dissociative multiphoton ionization of NO2 studied by time-resolved imaging. J Chem Phys, 2004, 121(16): 776–7783CrossRefGoogle Scholar

Copyright information

© Science in China Press 2006

Authors and Affiliations

  • Zhu Jingyi 
    • 1
    • 2
  • Guo Wei 
    • 1
    • 2
  • Wang Yanqiu 
    • 1
  • Wang Li 
    • 1
    Email author
  1. 1.State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsDalianChina
  2. 2.Graduate School of the Chinese Academy of SciencesBeijingChina

Personalised recommendations