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41.
The subsolidus region of ternary salt systems Na2MoO4-AMoO4-R2(MoO4)3 was studied. It was established that phases Na1-x
A1-x
R1+x
(MoO4)3, 0 x 0.2-0.3 of variable composition with rhombohedral lattice (R-3c) and ternary molybdates NaA3R(MoO4)5 of triclinic crystal system (P-1) are formed in the system. The electrical characteristics of ternary molybdates and the effect of the cation nature on the homogeneity region of the phases and type of conduction were studied. 相似文献
42.
S.P. Solodovnikov A.N. Nesmeyanov N.A. Volkenau L.S. Kotova 《Journal of organometallic chemistry》1980,201(2):C45-C49
ESR spectra of arenecyclopentadienyliron dications have been studied at 77 K. Arenecyclopentadienyliron cations were oxidized with SbCl5 in CH2Cl2 solution at 203 K. The g∥ and g⊥ values have been measured and splittings of the degenerate e2g orbitals have been calculated. The energy differences between the split components proved to be considerably smaller than that of the e?t1g level in the corresponding neutral complexes. They are, however, larger than the splittings of the e2g orbitals observed in ferricinium cations. 相似文献
43.
44.
Turaikhanov D. A. Shkalikov A. V. Kalachev A. A. Imangulova I. R. Losevskii N. N. Razuvaeva E. V. Samagin S. A. Kotova S. P. 《Optics and Spectroscopy》2019,126(1):25-28
Optics and Spectroscopy - Specific features of the construction and recording of axially symmetric vortex fields using diffraction optical elements, which can be used for generating single-photon... 相似文献
45.
Results of experiments on wavefront formation using multichannel modal correctors in an adaptive optical system with feedback
are reported. Two types of correctors, one based on a glass substrate with a high-resistance layer deposited onto it and the
other based on a high-permittivity ceramic substrate, are developed and investigated. The results show that it is expedient
to use the correctors in applications that do not require a high speed of response. 相似文献
46.
A. A. Vashchenko L. S. Lepnev A. G. Vitukhnovskii O. V. Kotova S. V. Eliseeva N. P. Kuz’mina 《Optics and Spectroscopy》2010,108(3):463-465
It is studied how the introduction of various substituents into the composition of organic ligands affects the photoluminescence
spectra of new zinc(II) complexes with tetradentate Schiff bases H2L (derivatives of salicylic aldehyde (H2SAL1, H2SAL2) and o-vanillin (H2MO1, H2MO2) with ethylenediamine and o-phenylenediamine) in the form of bulk solids and thin films. It is demonstrated that the emission spectra of bulk solid complexes
without o-phenylenediamine bridges (ZnSAL1 and ZnMO1) contain additional long-wavelength bands compared to the spectra of corresponding
thin films. In the case of films obtained from [ZnSAL1]2 dimer complexes, the long-wavelength band is dominant. At the same time, the photoluminescence spectra of ZnSAL2 and ZnMO2
complexes with o-phenylenediamine bridges are similar in the case of solid samples and thin films. The electroluminescent properties of organic
light-emitting diodes (OLEDs) with the ITO/α-NPD/ZnL/Ca:Al structure are studied. The bathochromic shift of the electroluminescence
peaks of OLEDs with respect to the photoluminescence spectra of bulk solid samples and thin films is probably related to the
formation of exciplexes at the α-NPD/ZnL interface. The electroluminescence spectra of OLEDs based on [ZnSAL1]2 show a hypsochromic shift of the emission maximum, which can be caused by a shift of the recombination region into the α-NPD
layer. 相似文献
47.
G. V. Vdovin I. R. Guralnik O. A. Zayakin N. A. Klimov S. P. Kotova M. Yu. Loktev A. F. Naumov V. V. Patlan S. A. Samagin 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(1):71-77
The results of the development of modal liquid crystal wavefront correctors are reviewed. The modal principle of control is described. Characteristics and examples of application of electrically and optically controlled lenses and multichannel correctors with a tunable response function in different systems are reported. 相似文献
48.
V L Shapovalov T I Rokitskaya E A Kotova O V Krokhin Y N Antonenko 《Photochemistry and photobiology》2001,74(1):1-7
Interaction of potent photodynamic agents, sulfonated aluminum phthalocyanines (AlPcSn where n is a number of sulfonic groups), with biological membranes was studied here using model systems: sensitized photoinactivation of gramicidin channels in planar lipid bilayers and adsorption on lipid monolayers. Fluoride anions known to form complexes with aluminum were found to inhibit both the adsorption of aluminum phthalocyanines on lipid monolayers, as measured with a Langmuir trough by surface pressure and surface potential changes, and photodynamic efficacy of the dyes, as studied by gramicidin channel photoinactivation. The similar effects were caused by the alkalinization of the medium. Fluoride anions appeared to be much more effective in the case of AlPcS4 as compared to AlPcS3. The suppression of the photodynamic potency of aluminum phthalocyanines was attributed to desorption of the dyes from lipid bilayers induced by fluoride or hydroxyl ions. With AlPcS4 an enhancement of the dye aggregation leading to a decrease in the sensitizing activity was probably involved in the fluoride effect as revealed by absorption and fluorescence spectral measurements. Capillary electrophoresis was employed to understand the mechanism of the dye desorption. The results of these experiments indicated that the reduction in the membrane affinity was associated with an increase in the negative charge of the dye molecules due to the binding of fluoride or hydroxyl ions. 相似文献
49.
M.I. Yanovskaya N.M. Kotova N.V. Golubko N.YA. Turova 《Journal of Sol-Gel Science and Technology》1998,11(1):23-29
The interaction between magnesium and titanium alkoxides is studied in order to chose the best precursors for synthesis of MgTiO3. No reaction between magnesium and titanium methoxides and isopropoxides occurs. The solubility diagrams for Mg(OR)2-Ti(OR)4-ROH, R = Et,-Bu at 20°C are studied. Magnesium ethoxotitanates of variable composition MgnTi4-n (OEt)16-2n2nEtOH (n=2.0-0) which are structural analogs of Ti4(OR)16 (R = Me, Et) are isolated. This is a quite unusual example of statistical distribution of heteroatoms in molecular structures of metal alkoxides. Among the systems of metal alkoxides with simple aliphatic radicals only Mg(OBu)2-Ti(OBu)4-BuOH gives a convenient precursor for the synthesis of MgTiO3. A simple scheme of preparation of magnesium titanate from the alkoxide solutions is suggested. The phase purity of MgTiO3 is to a considerable extent dependent on the hydrolysis conditions. The alkoxy-derived magnesium titanate is obtained in the form of a uniform fine powder, it can be sintered into dense ceramics in the temperature range of 1140–1220°C which is 150–200°C lower in comparison with the conventional powders. 相似文献
50.
A.N. Nesmeyanov Yu.S. Nekrasov N.I. Vasyukova L.S. Kotova N.A. Volkenau 《Journal of organometallic chemistry》1975,96(2):265-269
Mass spectra of exo-R-cyclohexadienyl(cyclopentadienyl)iron derivatives have been studied to show that the main fragmentation routes involve stereo-selective migration of the endo-hydrogen of the cyclohexadienyl ring to the iron. 相似文献