Spectral, luminescent, and lasing characteristics of pyridyloxazole derivatives in inorganic and hybrid gel materialsOptics and Spectroscopy - Tập 104 - Trang 190-195 - 2011
R. T. Kuznetsova, G. V. Mayer, Yu. A. Manekina, E. N. Tel’minov, S. M. Arabei, T. A. Pavich, K. N. Solovyov
The spectral, luminescent, lasing, and photochemical characteristics of two pyridyloxazole derivatives incorporated during the sol-gel synthesis into inorganic silicate and hybrid organic-inorganic xerogels in the form of bulk matrices and thin films are studied. It is found that organic molecules are fixed in nanopores of solid matrices by specific interactions between proton-accepting centers of...... hiện toàn bộ
Separation of a weak fluorescence signal of 3-hydroxyflavone using dynamic quenchingOptics and Spectroscopy - Tập 106 - Trang 355-358 - 2009
V. I. Tomin
The spectral and time characteristics of the dual fluorescence of a 3-hydroxyflavone probe in a solution with a fluorescence quencher are studied in the temperature range of 20–80°C. At room temperature, the fluorescence consists of two bands that belong to the normal and tautomeric forms of the luminophore, while heating of the solution results in the appearance of an additional fluorescence band...... hiện toàn bộ
Optical, nanostructural, and biophysical properties of Zn-induced changes in human erythrocyte membranesOptics and Spectroscopy - Tập 110 - Trang 534-540 - 2011
A. Ya. Khairullina, T. V. Ol’shanskaya, D. S. Filimonenko, N. M. Kozlova, Yu. M. Garmaza, E. I. Slobozhanina
We studied changes in the surface of erythrocyte membranes exposed to the action of zinc sulfate in the concentration range of 0.1–2.0 mM/l using methods of light scattering, spectrofluorimetry, and atomic force microscopy. Using the spectrofluorimetry method, we revealed a dose-dependent increase in the fluorescence intensity of a fluorescamine probe incorporated into erythrocyte membranes modifi...... hiện toàn bộ
Narrowing of sub-Doppler saturated-absorption resonances in multilayer gas cellsOptics and Spectroscopy - Tập 117 - Trang 139-144 - 2014
A. Ch. Izmailov
We have studied theoretically nontrivial specific features of sub-Doppler resonances of saturated absorption in a multilayer gas cell with a rarefied gas medium, which is a compact analog of a large number of plane-parallel atomic beams. Spatially separated saturating and probing monochromatic laser beams that co- and counterpropagate (at the same frequency) in this cell have been considered. In t...... hiện toàn bộ
Structure and Optical Characteristics of Barium–Strontium Niobate Films on Al2O3 SubstratesOptics and Spectroscopy - Tập 126 - Trang 487-491 - 2019
A. V. Pavlenko, S. V. Kara-Murza, A. P. Korchikova, A. A. Tikhii, D. V. Stryukov, N. V. Kovtun
The structure and optical characteristics of thin films of relaxor ferroelectric Ba0.5Sr0.5Nb2O6 grown by RF sputtering in an oxygen atmosphere on an Al2O3 substrate (c cut) have been studied. X-ray diffraction analysis shows that Ba0.5Sr0.5Nb2O6 films are c-oriented and unit-cell parameter c is 3.948(1) Å. Ellipsometric measurements confirm that SBN-50 films are characterized by a natural growth ...... hiện toàn bộ
Photophysical properties of porphyrin photosensitizersOptics and Spectroscopy - Tập 119 - Trang 633-637 - 2015
A. V. Dadeko, T. D. Murav’eva, A. M. Starodubtsev, S. I. Gorelov, M. V. Dobrun, T. K. Kris’ko, I. V. Bagrov, I. M. Belousova, G. V. Ponomarev
The photodynamic properties of a new photosensitizer—dimegin (disodium salt of 2,4-di(1- methoxyethyl)-deuteroporphyrin-IX)—are studied in comparison with the properties of photosensitizers used in medical practice, namely, Photoditazine (dimethylglucamine salt of chlorin e6) and Radachlorin (trisodium salt of chlorin e6). The spectral characteristics, singlet oxygen generation ability, luminescen...... hiện toàn bộ