Laser spectroscopy of hydrogen-bonded complexes of carbazole with water cooled in supersonic jet

N. A Borisevich; V. A. Povedailo; E. E. Tselesh; D. L. Yakovlev

doi:10.1117/12.752300

9 July 2007 Laser spectroscopy of hydrogen-bonded complexes of carbazole with water cooled in supersonic jet

N. A Borisevich, V. A. Povedailo, E. E. Tselesh, D. L. Yakovlev

Proceedings Volume 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics; 67270R (2007) https://doi.org/10.1117/12.752300
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

Abstract

Rotational contours of bands of electron and vibronic transitions of the fluorescence excitation spectrum of jet-cooled carbazole complexes with one, two and three water molecules are studied. For the carbazole-(H₂O)₁ complex two bands separated at 0.57 cm^-1 are registered at excitation of pure electron transition and other electron and vibronic transitions by radiation with a spectral width of 0.08 cm^-1. This is caused by the tunnel effect. The intensities of the shifted low-frequency bands are three times as weak as the high-frequency ones because of different nuclear spin-statistical weights. Water molecules in carbazole-(H₂O)₂ and carbazole-(H₂O)₃ complexes are combined into a chain by the hydrogen bond. Both ends of this chain are also hydrogen-bonded with a carbazole molecule. There is the interchange of the axes I_A and I_B of the principal moments of inertia in the carbazole-(H₂O)₃ complex, as compared to the remaining considered complexes. This results in increasing the Q-branch intensity.

Citation Download Citation

N. A Borisevich, V. A. Povedailo, E. E. Tselesh, and D. L. Yakovlev "Laser spectroscopy of hydrogen-bonded complexes of carbazole with water cooled in supersonic jet", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67270R (9 July 2007); https://doi.org/10.1117/12.752300

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