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Journal of Applied Spectroscopy

, Volume 85, Issue 1, pp 32–36 | Cite as

Electron-Impact Excitation of Uracil Luminescence on a Ceramic Surface

  • I. I. Shafranyosh
  • I. E. Mitropolskiy
  • V. V. Kuzma
  • Yu. Yu. Svyda
  • M. I. Sukhoviya
Article
  • 28 Downloads

Photoelectron spectroscopy was applied to pyrimidine nitrogenous bases, an important class of six-membered heterocyclic compounds incorporated into nucleic acids. The emission spectrum of uracil adsorbed on a ceramic surface that was obtained by bombardment with 600-eV electrons in a high vacuum was analyzed. Broad bands with maxima at 335, 435, and 495 nm were observed in the UV and visible regions. The strongest band (λ = 335 nm) was attributed to fluorescence and corresponded to a singlet–singlet transition from the first excited electronic state into the molecular ground state. Electronic transitions from a triplet T1 into the ground state formed a weaker phosphorescence band (λ = 435 nm). The nature of the band maximum at 495 nm is discussed. The obtained luminescence spectrum was compared with photoluminescence spectra in various phases.

Keywords

photoelectron spectroscopy electron beam surface uracil luminescence 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • I. I. Shafranyosh
    • 1
  • I. E. Mitropolskiy
    • 1
  • V. V. Kuzma
    • 1
  • Yu. Yu. Svyda
    • 1
  • M. I. Sukhoviya
    • 1
  1. 1.Uzhhorod National UniversityUzhhorodUkraine

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