Spectral and generation properties of new coumarins – benzopyrylium derivatives

  • Slavamir S. Anufrik Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus
  • Vikentiy V. Tarkovsky Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus
  • Sergey N. Anuchin Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus
DOI: https://doi.org/10.33581/2520-2243-2022-2-19-25

Abstract

The spectral and generation parameters of coumarins, benzopyrylium derivatives, in ethanol and acetonitrile under coherent excitation were studied. It was found that the absorption spectra of the investigated compounds contain several maxima and the structuredness of the spectra is associated with their bichromophoric structure. It is shown that these organic dyes are bichromophoric compounds. It is noted that the nature of the substituents in positions 6 and 7 of the coumarin base and positions 6′ and 7′ of the benzopyrylium core determines their spectral-luminescent and lasing properties. It is demonstrated that the presence of substituents in certain positions of the coumarin base and the benzopyrylium core changes the conformation of the molecule and, accordingly, the dipole moments and oscillator strengths of the transition. The generation ability of coumarins of this class manifests itself only in the presence of the strongest donor substituents (for example, Et2N and OH) in position 7, and sufficiently strong acceptors in positions 6′ and 7′. Lasing was obtained in the spectral region of 730 –740 nm on dyes – benzopyrylium derivatives.

Author Biographies

Slavamir S. Anufrik, Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus

doctor of science (physics and mathematics); professor at the department of theoretical physics and heat engineering, physico-technical faculty

Vikentiy V. Tarkovsky, Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus

PhD (physics and mathematics); associate professor at the department of theoretical physics and heat engineering, physico-technical faculty

Sergey N. Anuchin, Yanka Kupala State University of Grodno, 22 Ažeška Street, Hrodna 230023, Belarus

junior researcher at the department of theoretical physics and heat engineering, physico-technical faculty

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Published
2022-06-06
Keywords: coumarins, benzopyrylium derivatives, absorption spectra, molecular structure, bichromophores, generation characteristics
How to Cite
Anufrik, S. S., Tarkovsky, V. V., & Anuchin, S. N. (2022). Spectral and generation properties of new coumarins – benzopyrylium derivatives. Journal of the Belarusian State University. Physics, 2, 19-25. https://doi.org/10.33581/2520-2243-2022-2-19-25
Issue
No 2 (2022): Journal of the Belarusian State University. Physics
Section
Laser Physics

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