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POSITION
Professor at Experimental physics department, Faculty of Physics
WORK EXPERIENCE
1971-1972
Engineer-Researcher
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
1974 - 1981
Senior Engineer-Researcher
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
1981 - 1986
Assistant
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
1986 - 1988
Deputy Dean
Faculty of Physics,
Taras Shevchenko National University of Kyiv
1988 - 2002
Associated Professor
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
2002 - present
Professor
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
2003-2017
Head of Experimental Physics Department
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
1983 - present
Leader of the Researh Group of Photonics of Organic Media
Experimental Physics Department, Faculty of Physics,
Taras Shevchenko National University of Kyiv
EDUCATION AND DEGREES
1971
Master degree in Optics of Solid State,
Taras Shevchenko National University of Kyiv
1983
Pd.D.
Taras Shevchenko National University of Kyiv
2001
Doctor of Science
Taras
Shevchenko National University of Kyiv
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Electronic processes in organic materials
Research Fields:
Physics
Health
Digital, Industry and Space
Previous and Current Research
For now, there are two directions of the research in our group which are carried out:
- Study of interaction of viruses with the membrane, and electronic processes in viruses, aimed on the understanding of the pathways of excitation energy dissipation after absorption of electromagnetic irradiation. For this, we study absorption, fluorescence and phosphorescence spectra, phosphorescence intensity decay and emission anisotropy of viruses and their components (nucleic acids and proteins), and effect of interaction with the membrane on these spectra.
- Design of nanosystems for X-ray photodynamic therapy of cancer and study of electronic processes in them. Earlier we demonstrated excitation energy transfer in nanosystems from the scintillation nanoparticle that could be excited by X-rays (polystyrene or cerium fluoride) to the photosensitizer which can generate reactive oxygen species (chlorin e6). Now we study nanosystems containing organic matrix as an intermediate between scintillation and photosensitizer parts of the nanosystem to increase its efficiency.
- Besides, our recent experience includes studies of organic molecules for OLEDs and electronic properties in the films containing these molecules.

Fig.1
Fig. 1. Electronic excitation energy transfer (EEET) in polystyrene-diphenyloxazole-chlorin e6
nanosystem.

Fig. 2
Fig. 2. Electron microscopy image of IPNV virions (Ukr.J.Phys.-2019.-64,N2.-P.120-125) and phosphorescence spectra of IPNV RNA.
Future Projects and Goals
Further we plan to continue studies of electronic processes in viruses; nanosystems for X-ray phorodynamic therapy; and we are open for the collaboration in any projects which involve luminescent spectroscopy of organic molecules and electronic processes in organic materials.
Methodological and Technical Expertise
UV-vis spectroscopy of solutions
Luminescence (fluorescence and phosphorescence) of solutions and solid samples at temperatures from room temperature to 77K
Time resolved phosphorescence
Polarization of fluorescence and phosphorescence
Our team
Physics:
Prof. V.M. Yashchuk
Ph.D. M.Y. Losytskyy
Ph.D. V.M. Kravchenko
Dr. V.Ya. Degoda
Ph.D. G.P. Podust
Ph.D. O.M. Navozenko
M.A. Dotsenko (student)
Chemistry (synthesis of nanoparticles and polymers):
Dr. L.O. Vretik
Ph.D. O.A. Nikolaeva
Biology (obtaining viruses and their components and their biology study):
Prof. L.P. Buchatskyi
Ph.D. Yu.P. Rud
Ph.D. O.V. Zaloilo
Ph.D. O.Yu. Artemenko
Selected Publications
1. V.M. Yashchuk, M.Z. Galunov, I.V. Lebedyeva, O.A. Tarasenko, O.M. Navozenko, E.V. Vashchilina, A.V. Krech, M.Yu. Losytskyy, M.A. Dotsenko. Some peculiarities of triplet excitations dynamics in organic macromolecules and crystals // Molecular Crystals and Liquid Crystals. – 2022.- DOI: 10.1080/15421406.2022.2066786
2. M.Y. Losytskyy, R.A. Kharchenko, D.V. Gryn, M.A. Dotsenko, Yu.S. Boiko, O.M. Kozachkova, A.N. Samoilov, A.A. Golub, V.M. Yashchuk. Luminescence of singlet oxygen generated by fullerene C60 - aminopropylsilica nanocomposites // Func. Mater.- 2022.- V.29(2)- P.189-192.
3. A. Grebinyk, V. Yashchuk, N. Bashmakova, D. Gryn, T. Hagemann, A. Naumenko, N. Kutsevol,·T. Dandekar,·M. Frohme. A new triple system DNA Nanosilver Berberine for cancer therapy // Applied Nanoscience.-2019.-V.9.-P.945-956.
4. V.M. Kravchenko, Y.P. Rud, L.P. Buchatski, Y.Y. Stepanenko, D.V. Gryn, V.M. Yashchuk. Spectroscopic Studies of Infectious Pancreatic Necrosis Virus, Its Major Capsid Protein, and RNA // Ukr J Phys.-2019.-64(2).-P.120-125.
5. M. Yu. Losytskyy, L. O. Vretik, N. V. Kutsevol, O. A. Nikolaeva, V. M. Yashchuk. Uptake of Chlorin e6
Photosensitizer by Polystyrene-Diphenyloxazole-Poly(N-Isopropylacrylamide) Hybrid Nanosystem Studied by Electronic Excitation Energy Transfer // Nanoscale Research Letters.- 2018.- Vol.13.- 166.
6. V.Y. Kudrya, V.M. Yashchuk, A.P. Naumenko, T.V. Udod, Y.S. Kreminska. Spectral properties of single-stranded viral DNA fragment // Ukrainian Journal of Physics.- 2018.- V.63(10).- P.912-915.
7. V.M. Yashchuk, V.Yu. Kudrya. The spectral properties of DNA and RNA macromolecules at low temperatures: fundamental and applied aspects // Methods Appl. Fluoresc.- 2017.- V.5.- 014001.
8. M.Y. Losytskyy,, L.V.Kuzmenko, O.B.Shcherbakov, N.F.Gamaleia, A.I.Marynin, V.M. Yashchuk. Energy Transfer in Ce0.85Tb0.15F3
Nanoparticles-CTAB Shell-Chlorin e6 System // Nanoscale Research Letters.-2017.- V.12(1).-294.
9. M.Yu. Losytskyy, L.O. Vretik, O.A. Nikolaeva, A.I. Marynin, N.F. Gamaleya, V.M. Yashchuk. Polystyrene-diphenyloxazole-chlorin e6 nanosystem for PDT: energy transfer study // Molecular Crystals and Liquid Crystals.-2016.-V.639(1).-P.169-176.
10. V.M. Yashchuk, V.Y. Kudrya, I.Y. Dubey, K.I. Kovalyuk, O.I. Batsmanova, V.I. Mel'nik, G.V. Klishevich. Luminescence of telomeric fragments of DNA macromolecule // Mol. Cryst. Liq. Cryst.-2016.-V.639(1).-P.151-159.
Contacts
Homepage: http://exp.phys.univ.kiev.ua/en/People/Faculty/Yashchuk/index.html
+38-050-413-23-23
yashchukvaleriy@gmail.com
https://www.linkedin.com/in/valeriy-yashchuk-09542648/
https://www.researchgate.net/profile/Valeriy-Yashchuk-2
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