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Electron-Impact Excitation of Uracil Luminescence on a Ceramic Surface

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Journal of Applied Spectroscopy Aims and scope

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.

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Correspondence to I. I. Shafranyosh.

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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 85, No. 1, pp. 38–43, January–February, 2018.

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Shafranyosh, I.I., Mitropolskiy, I.E., Kuzma, V.V. et al. Electron-Impact Excitation of Uracil Luminescence on a Ceramic Surface. J Appl Spectrosc 85, 32–36 (2018). https://doi.org/10.1007/s10812-018-0607-7

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  • DOI: https://doi.org/10.1007/s10812-018-0607-7

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