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Lev R. Ryzhkov

	Professor Organic Chemistry Office: 553 Smith Phone: (410)704-3831 E-mail: lryzhkov@towson.edu Website: http://pages.towson.edu/ryzhkov
Education	B.S. Chemistry (1986) Stevens Institute of Technology, with Honors Ph.D. Physical Organic Chemistry (1991) Brown University Postdoctoral Associate (1991-1994) Yale University
Teaching	General Chemistry I,II (CHEM 110/111) Organic Chemistry I,II (CHEM 331/332) Essentials of Organic Chemistry (CHEM 330) Women, Society, and Radiation Science (IDNM 309)
Research	The main emphasis of the research in my lab is the elucidation of the structure and dynamics of the organic molecules with one or two unpaired electrons (organic free-radicals and biradicals). Currently, I'm inquiring into the mechanism of diacyl peroxides decomposition and the stability and dynamics of the resultant acyloxy radical intermediates. In addition, we also study the mechanism of photolysis of cyclic diazoalkanes and solution phase studies of their excited triplets. In the solid state, we use low-temperature, single crystal EPR (Electron Paramagnetic Resonance) to determine the structure and electronic properties of the cyclic hydrocarbon and other biradicals. Our single-crystal work also extends into studies of the liquid inclusions in organic crystal containing free-radicals using EPR spectroscopy.
Selected Publications	Alicia Fraind, Ryan Turncliff, Teri Fox, Brian Salisbury, Justin Sodano, Adam Elabd.; Ryzhkov, L. R. “Geminate Reactions and the Lifetimes of Acyloxy Radicals in Thermal Decomposition of Symmetrical Primary Diacyl Peroxides” J. Undergrad. Chem. Res.* 2007, 6(2), 67. Wasylenko, W.; Kebede, N.; Showalter, B. M.; Matsunaga, N.; Miceli, A. P.; Ryzhkov, L. R.; Hadad, C. M.; Toscano, J. P. “Experimental and Computational Confirmation of the Triplet Ground State of Oxynitrenes” J. Am. Chem. Soc.* 2006, 128, 13142. Link to Full Article Evans, S. E.; Mon, S.; Singh, R.; Ryzhkov, L. R.; Szalai, V. A. “DNA Oxidation in Anionic Reverse Micelles: Ruthenium-Mediated Damage at Guanine in Single- and Double-Stranded DNA” Inorg. Chem.* 2006, 45(7), 3124. Link to Full Article Ryzhkov, L. R.; Bentz, T. C.; “Study of Chemical Shift Variations in Tricyclic Urazoles with a Norbornane Skeleton” Spectr. Lett.* 2006, 39(3), 225. Link to Full Article Ryzhkov, L. R.; Toscano, J. P. “Crystal Lattice Effects on the Orientation and Orbital Degeneracy of Nitric Oxide Trapped in Nitramine Single Crystals” J. Cryst. Growth Des. 2005, 5(6), 2066. Link to Full Article Manuel Marquez, Josh Robinson; Vincent van Nostrand; David Schaefer; Lev R. Ryzhkov; Walter Lowe; Steven S. Suib “Atomic Force Microscopy, Electron Paramagnetic Resonance and X-ray Fluorescence Investigations of Self-Assembled Lines from Colloidal Solutions of Lamellar MnO_x” Chem. Mater. 2002, 14(4), 1493. Link to Full Article Ferraris, D.; Cox, C.; Dudding, T.; Young, B.; Drury, W. J. III, Ryzhkov, L.; Lectka, T. “Catalytic, Enantioselective Alkylation of α-Imino Esters: The Synthesis of Non-natural α-Amino Acid Derivatives” J. Am. Chem. Soc. 2002, 124(1), 67. Link to Full Article Showalter, B. M., Bentz, T. C.; Ryzhkov, L. R.; Hadad, C. J.; Toscano, J. P. “Time-Resolved IR Studies of Triplet 1,3-Cyclopentanediyl” J. Phys. Org. Chem.* 2000, 13, 1. Link to Full Article Ryzhkov, L. R. “Stereochemical Effects on ¹H-NMR Chemical Shifts in 2,3-diazabicyclo[2.2.1]hept-2-ene (DBH), 2,3-diazabicyclo[2.2.2]oct-2-ene (DBO) and Related Molecules” Spectr. Lett. 1998, 31(5), 1089. Link to Full Article Ryzhkov, L. R.; McBride, M. J. “Structure, Motion and Exchange Coupling of ¹⁵NO₂/¹⁵NO₂ Radical Pairs Occupying Adjacent Solvent Cavities of α-HNIW, a Nitramine Hydrate” J. Am. Chem. Soc. 1997, 119, 4826. Link to Full Article

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Department of Chemistry
Smith Hall 543
Towson University
8000 York Road
Towson, MD 21252