Optics and Spectroscopy

, Volume 104, Issue 3, pp 331–336 | Cite as

Rotational contours of electronic and electronic-vibrational bands of carbazole complexes with water cooled in a supersonic jet

  • V. A. Povedailo
  • E. E. Tselesh
  • D. L. Yakovlev
Spectroscopy of Atoms and Molecules
First Online:
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  • 32 Downloads

Abstract

The rotational contours of the bands corresponding to electronic and electronic-vibrational transitions of the fluorescence excitation spectrum of jet-cooled carbazole complexes with one, two, and three water molecules have been studied. For the carbazole-(H2O)1 complex, two bands with a spectral shift of 0.57 cm−1 were recorded under exposure to radiation with a spectral width of 0.08 cm−1 at the frequency of the purely electronic transition and some other electronic-vibrational transitions. This is caused by the tunnel effect. The intensities of the shifted low-frequency bands are threefold weaker than those of high-frequency bands due to different values of nuclear spin-statistical weights. In the carbazole-(H2O)2 and carbazole-(H2O)3 complexes, water molecules are combined into a chain by the hydrogen bond, and the two ends of the chain are hydrogen-bonded to the carbazole molecule. The principal axes I A and I B of the moments of inertia in carbazole-(H2O)3 have different orientation compared to the other complexes considered, and this leads to an increase in the intensity of the Q-branch.

PACS numbers

33.20.Vq 33.20.Ea 
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Copyright information

© Pleiades Publishing, Ltd. 2008

Authors and Affiliations

  • V. A. Povedailo
    • 1
  • E. E. Tselesh
    • 1
  • D. L. Yakovlev
    • 1
  1. 1.Institute of Molecular and Atomic PhysicsNational Academy of Sciences of BelarusMinskBelarus

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