Aleksandra Lewanowicz, Ph.D.

A3/401c
071-3203924 (071-320-3500)
aleksandra.lewanowicz@pwr.wroc.pl

Research profile

Molecular spectroscopy, photophysics, photochemistry, physical chemistry.
Photoactivity of organic systems in relation to their luminescence, excited state intramolecular proton transfer and photochromic reactions, as well as thermochromic behavior.


Publications

  1. A. Lewanowicz, Termochromism of N-triphenylmethylsalicylideneimine. Activity of the trans-open enol conformer at low temperature, , Mol. Cryst. Liq. Cryst., 467 xxx (2007)
  2. A. Lewanowicz, Cząsteczki w naddźwiękowych wiązkach molekularnych,, In: Chemia fizyczna , Vol. t. 2, Fizykochemia m, Chapter 11.7. 9, p. 349-354 Editor: L. Komorowski i J. Lipiński, PWN, Warszawa 2005
  3. A. Olszowski, A. Lewanowicz, P. Dziekoński, W. A. Sokalski, J. Leszczynski, Environmentally induced H-bond transformation as a source of anil-type molecule specific solvatochromy, Mol.Cryst.Liq.Cryst. 427 557-570 (2005) DOI [Copy available on request]
  4. A. Lewanowicz, J. Lipiński, A. Olszowski, J. Sworakowski, Photochemical reactions in polycrystalline 1-methyl-2,4,4,6-tetraphenyl-1,4-dihydropyridine., Phase Transitions 76 847-855 (2003) DOI
  5. E. Śliwińska, K. Palewska, A. Lewanowicz, J. Lipiński, J. Sworakowski, R. Gancarz, S. Nespurek, Spectroscopic studies of two dynamically different 1,4-dihydropyridine structures., Pol. J. Chem. 76 235-247 (2002)
  6. J. Sworakowski, S. Nespurek, J. Lipiński, A. Lewanowicz, E. Sliwinska, Kinetics of photochromic processes in substituted dihydropyridines in the solid state and in solutions., Mol. Cryst. Liq. Cryst. 356 163-173 (2001)
  7. A. Lewanowicz, J. Lipiński, S. Nespurek, A. Olszowski, E. Sliwinska, J. Sworakowski, Photochromic activity of dihydropyridine derivatives: energetics and kinetics of photochemically driven reactions in polycrystalline 1-methyl-2,4,4,6-tetraphenyl-1,4-dihydropyridine, J. Photochem. Photobiol. A 121 125-132 (1999) DOI
  8. J. Sworakowski, S. Nespurek, J. Lipiński, A. Lewanowicz, On the mechanism of bleaching reactions in a photochromic dihydropyridine derivative., J. Photochem. Photobiol. A 129 81-87 (1999) DOI
  9. K. Janus, J. Sworakowski, A. Olszowski, A. Lewanowicz, J. Lipiński, E. Luboch, J. Biernat, Kinetics of a photochromic reaction in a dibenzoazo crown ether in solution and in polymer matrices., Adv. Mater. Opt. Electr. 9 181-187 (1999)
  10. A. Lewanowicz, O fluorescencji diaza pochodnej fenazyny., Biul. Inst. Chem. Fiz. i Teoret. PWroc. 7 95-100 (1999)
  11. A. Lewanowicz, J. Lipiński, S. Nespurek, A. Olszowski, E. Sliwinska, J. Sworakowski, Isothermal and non-isothermal techniques in kinetic studies of reactions in a photoactive molecular material., J. Incl. Phenom. Macrocycl. Chem. 35 139-146 (1999)
  12. A. Lewanowicz, J. Lipiński, Low-lying excited singlet states and S2 --> S0 luminescence of dipyrido[3,4-b: 2,3-d] phenazine., J. Mol. Struct. 450 163-169 (1998)
  13. A. Lewanowicz, J. Lipiński, R. Siedlecka, J. Skarżewski, F. Baert, Chiral beta-amino sulfoxides. Synthesis, configurational assignment and conformational analysis based on X-ray, CD, 1H NMR and theoretical calculations., Tetrahedron 54 6571-6586 (1998)
  14. A. Lewanowicz, S. Roszak, R. Siedlecka, The structural study of beta-amino sulfoxide., Mol. Phys. Rep. 14 9-17 (1996)
  15. A. Lewanowicz, R. Siedlecka, W. Bartkowiak, F. Hamzaoui, Sulphur-containing compounds: structure, spectra, non-linearity. Experimental and theoretical study., Adv. Mater. Opt. Electr. 6 225-232 (1996)
  16. A. Lewanowicz, Archiwum chemii fizycznej. Bibliografia specjalna 1945-1995., Biul. Inst. Chem. Fiz. i Teoret. PWroc. 1-211 (1995)
  17. A. Lewanowicz, F. Baert, 2-(2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, C13H10ClN3O., Acta Cryst. C50 801-803 (1994)
  18. A. Lewanowicz, F. Baert, X-ray analysis and proton transfer reaction in the crystal of 2-(2'-hydroxy-5'-methylphenyl)-5-chlorobenzotriazole., Mol. Cryst. Liq. Cryst. 229 53-58 (1993)
  19. A. Lewanowicz, J. Lipiński, Z. Ruziewicz, A. Szymczak, J. Szynkarczuk, Position-dependent effects of internal heavy atoms on highly resolved electronic spectra and luminescence properties of some quinoxalines substituted at the homocyclic ring., J. Luminesc. 43 85-102 (1989)
  20. H. Chojnacki, Z. Laskowski, A. Lewanowicz, Z. Ruziewicz, R. Wandas, Reinvestigation of the absorption spectrum of triphenylene: vibronic structure of the S1-S0 transition and location of higher excited singlet states., Chem. Phys. Lett. 124 478-482 (1986)
  21. A. Lewanowicz, J. Lipiński, Z. Ruziewicz, Low-temperature electronic spectra, luminescence properties and electronic structure of 1,8-diazatriphenylene. A comparison with 1,4-diazatriphenylene., J.Luminescence 26 159-175 (1981)
  22. A. Lewanowicz, J. Lipiński, Z. Ruziewicz, Highly resolved-electronic spectra and luminescence properties of some benZonaphthyridines at 77 K. Absorption and fluorescsnce spectra of 1,5-, 1,6-, and 4,6-benzo[h]nathphyrydines., J. Mol. Struct. 64 209-216 (1980)
  23. A. Lewanowicz, Z. Ruziewicz, Highly resolved electronic spectra and luminescence properties of some benZonaphthyridines at 77 K. I. Phosphorescence of 1.5-,1.6-, and 4.6-benZonaphthyridines., Bull. Acad. Pol. Sci. ser. sci. math. astr. phys. 26 761-766 (1978)
  24. A. Lewanowicz, Z. Ruziewicz, J. Lipiński, Electronic spectra and luminescence properties of 4,10-diazachrysene in crystalline and glassy matrices at 77 K., Acta Phys. Polon. A53 263-280 (1978)

Conference presentations

(selected)

Lewanowicz A. (2002)
New application UV stabilizer of polymers: 5-chloro-2-(2'-hydroxy-5'-methylphenyl)-benzotriazole, Electrical and Related Properties of Polymers and Other Organic Solids, 21st Disscusion Conference of P.M.M., 9th International Conference ERPOS, Prague, p. 73.

Lewanowicz A. (2004)
Photoluminescence study of chromic anil-type molecule: N-triphenylmethylsalicylideneimine in solid state, 6th International Conference on Excitonic Processes in Condensed Matter (EXCON '04), Cracow, p. 107.


Tematy prac dyplomowych i badawczych (Research topics for students)

  1. Analiza temperaturowej modyfikacji częstości charakterystycznych pochodnej 1,4 - dihydropirydyny obserwowanych w widmie Ramana.
  2. Analiza zmian temperaturowych widma fluorescencji kryształu N-trifenylometylo-salicylidenoiminy rejestrowanych dynamicznie.
  3. Częstości drgań podstawowych cząsteczki N-trifenylometylosalicylidenoiminy - porównanie danych doświadczalnych z wynikami obliczeń.
  4. Fotoluminescencja N-trifenylometylosalicylidenoiminy w środowisku polarnym w niskich temperaturach.