Alexander N. Tarnovsky
Alexander N. Tarnovsky, Ph.D.
Joined the faculty in 2005
Ph.D., S. I. Vavilov State Optical Institute, St. Petersburg, Russia (1993)
M.S., Institute of Fine Optics, St. Petersburg, Russia (1986)
The focus of our research interests is two-fold:
Developing a molecular-level understanding of the dynamics of chemical reactions occurring in solution, and;
Gaining a deep, detailed insight into the dynamics and
mechanisms of ultrafast (femto- and picosecond) photoinduced processes.
Our primary interest is "real time" investigation of ultrafast excited-state dynamics, bond rupture, and rearrangement of liquid-phase small polyatomic molecules, with most attention currently centered on polyhalogenated alkanes and transition metal complexes. The knowledge of the interplay between the initially populated Franck-Condon region, adiabatic/non-adiabatic excited-state dynamics, energy flow and solute-solvent interactions, is of central importance for achieving control over the photoreaction path. In our research, we use state-of-the-art experimental methods of ultrafast time-resolved spectroscopy, primarily deep-UV-through-near-IR pump/probe and laser pump/x-ray absorption probe.
O’Connor, T.; Panov, M. S.; Mereshchenko, A. S.; Tarnovsky, A. N.; Lorek, R.; Perera, D.; Diederich, G.; Lambright, S.; Moroz, P.; Zamkov M. The Effect of the charge-separating interface on exciton dynamics in photocatalytic colloidal heteronanocrystals. ACS Nano 2012, 6, 8156-8165. [Link]
Mereshchenko, A. S.; Pal, S. K.; Karabaeva, K. E.; El-Khoury, P. Z.; Tarnovsky, A. N. The photochemistry of monochloro complexes of copper(II) in methanol probed by ultrafast transient absorption spectroscopy. J. Phys. Chem. A, 2012, 116, 2791-2799. Femtochemistry: Special issue. [Link]
Zheldakov, I. L. Ryazantsev, M. N. Tarnovsky, A. N. Wavepacket motion via a conical intersection in the photochemistry of aqueous transition-metal dianions. J. Phys. Chem. Lett. 2011, 2, 1540–1545. [Link]
Pal, S. K.; Mereshchenko, A. S.; El-Khoury, P. Z.; Tarnovsky, A. N. Femtosecond photolysis of CH2Br2 in acetonitrile: capturing the bromomethyl radical and bromine-atom charge transfer complex through deep-to-near UV probing. Chem. Phys. Lett. 2011, 507, 69-73. [Link]
Khon. E.; Mereshchenko, A.; Tarnovsky, A. N.; Acharya, K.; Klinkova, A.; Hewa-Kasakarage, N. N.; Nemitz, I.; Zamkov M. Suppression of the plasmon resonance in Au/CdS colloidal nanocomposites. Nano Lett., 2011, 11, 1792–1799.