Ivan A. Mikhailov

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The photophysical, photochemical, two-photon absorption (2PA) and metal ion sensing properties of a new fluorene derivative (E)-1-(7-(4-(benzo[d]thiazol-2-yl)styryl)-9,9-bis(2-(2-ethoxyethoxy)ethyl)-9H-fluoren-2-yl)-3-(2-(9,10,16,17,18,19,21,22,23,24-decahydro-6H dibenzo[h,s][1,4,7,11,14,17]trioxatriazacycloicosin-20(7H)-yl)ethyl)thiourea (1) were(More)
Conjugated organic molecules with photochromic properties are being extensively studied as prospective optical switching and data storage materials. Among different photochromic compounds, diarylethenes demonstrate thermal stability, fatigue resistance, and high quantum yield. The mechanism of photoswitching in diarylethenes involves a symmetry-allowed(More)
Efficient reversible phototransformation of a new diarylethene-fluorene derivative, 1,2-bis(5-(9,9-didecyl-7-nitro-9H-fluoren-2-yl)-2-methylthiophen-3-yl)cyclopent-1-ene (1), was demonstrated in organic media under low-intensity laser excitation. Linear photophysical characterization of 1 was performed at room temperature in solvents of different polarity(More)
We report density functional theory (DFT) calculations of the Raman spectra for hexapeptides of glutamic acid and lysine in three different conformations (alpha, beta and PPII). The wave numbers of amide I, amide II and amide III bands of all three conformations predicted at B3LYP/6-31G and B3LYP/6-31G* are in good agreement with previously reported(More)
The synthesis, linear photophysical characterization, and nonlinear optical properties of two new symmetrical fluorene-containing quinolizinium derivatives, 2,8-bis((E)-2-(7-(diphenylamino)-9,9-dihexyl-9H-fluoren-2-yl)vinyl)quinolizinium hexafluorophosphate (1) and(More)
We calculate the electron energy spectrum of ionization by a high energy photon, accompanied by creation of e−e+ pair. The total cross section of the process is also obtained. The asymptotics of the cross section does not depend on the photon energy. At the photon energies exceeding a certain value ω0 this appeares to be the dominant mechanism of formation(More)
Operations were conducted on 22 patients with defects in soft tissues and trophic ulcers of cicatrix in the region of the calcaneal tendon. In 16 patients with extensive cicatricial lesions occupying two distal thirds or the whole region, an L-shaped flap of skin and fat was used, it was formed on the postero-lateral distal third of the leg, in the zone of(More)
On the basis of treatment of more than 5,000 patients with postburn cicatricial contractures of the joints, deformities and defects of the soft tissues the authors studied the complications and their causes. Suppuration of the operative wounds, necrosis of grafts and the edges of the wound, and hematomas are the main complications. The character of the(More)
Ivan A. Mikhailov, Olga A. Shukruto, Artëm E. Masunov, and Valentin V. Karasiev Nanoscience Technology Center, University of Central Florida Orlando, Florida 32826, USA ivan.mikhaylov@gmail.com Quantum Theory Project, Departments of Physics and of Chemistry, P.O. Box 118435, University of Florida, Gainesville, Florida 32611-8435, USA Nanoscience Technology(More)