Theoretical and Experimental Chemistry

, Volume 49, Issue 4, pp 228–234 | Cite as

Confocal Raman Spectroscopy of Biological Objects under Conditions of Photoinduced Luminescence Self-Quenching

  • D. Naumenko
  • B. A. SnopokEmail author
  • E. Serviene
  • I. Bruzaite
  • V. Snitka

A study was carried out on the mechanism of luminescence self-quenching of heterogeneous biological objects using laser irradiation at 532 nm (50 μW/ μm2) in the format of a confocal microscope. Laser irradiation was found to reduce the luminescence intensity of material by a factor of 3–5, which permits us to obtain informative Raman scattering spectra of the dried cellular envelope of yeast. For irradiation times less than ~3-5 min, quenching is probably due either to formation of radiationless complexes of the excited chromophore molecules with the environment (excimers and/or exciplexes) or partial photodecomposition. Longer irradiation times lead to thermal degradation of the samples with the appearance of peaks corresponding to amorphous carbon.

Key words

luminescence quenching yeast Raman scattering cell envelope photodestruction thermal degradation 


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • D. Naumenko
    • 1
  • B. A. Snopok
    • 1
    • 4
    Email author
  • E. Serviene
    • 2
    • 3
  • I. Bruzaite
    • 3
  • V. Snitka
    • 1
  1. 1.The Research Center for Microsystems and NanotechnologyKaunas University of TechnologyKaunasLithuania
  2. 2.Nature Research CenterVilniusLithuania
  3. 3.Vilnius Gediminas Technical University, Department of Chemistry and BioengineeringVilniusLithuania
  4. 4.V. E. Lashkaryov Institute of Semiconductor PhysicsNational Academy of Sciences of UkraineKyivUkraine

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