[en] The complexes of uranium (6) and (4) nitrates with trialkyl-phosphine oxides (TAPO) have been synthetized, and qeneral methods of their synthesis, separation and purification described. It has been found that, whatever the method of preparation, each compound of the synthesized homologous series of complexes corresponds only to disolvate stoichiometry of a qeneral formula, UO₂(NO₃)₂ x 2(Csub(n)Hsub(2n+1))₃PO and U(NO₃)₄ x 2(Csub(n)Hsub(2n+1))₃PO. It is shown that the complexes prepared do not contain water and nitric acid. The absence of water and acid in the complex composition, as well as the possibility of preparing the same compounds by the methods where no nitric acid is used, make it possible to believe that formation of acidocomplexes is unlikely. The described methods pf complex synthesis may be of use for preparative and analytical purposes in separating (quantitatively, in some cases) complexes of actinide, rare-earth, noble, transplutonium, and other elements with phosphates, phosphinates, phosphine oxides, di- and polyoxides, as well as with other organic ligands. The experimental data on the thermal properties of the complexes separated are presented

[en] Physicochemical properties of VO₂(NO₃)₂x2Bu₃PO and U(NO₃)₄x2Bu₃PO complexes have been investigated. Values of the complex solubility in water, pure diluents and also in the presence of a salting-out and of the excess of the organic complexing agent have been determined. The effect of the temperature and aqueous and organic phase content on the complex distribution in the two-phase decane-water system has been found out

[en] A series of MoS₂ layered flakes samples with 1-10 μm thickness is studied, in which a strong optical anisotropy is observed, which can be explained by the influence of stress or shear deformation. It is found that the intensity of transmitted light in crossed polarization reaches a maximum when the incident light is polarized along a certain axis. The degree of circular polarization of the transmitted light is also different from zero

No abstract available

[en] Highlights: • The spectra of polariton PL from cylindrical microcavities at strong exciton – photon coupling were investigated at a T=5 K depending on the intensity of optical excitation. • The spectra exhibit PL lines associated with levels of exciton-polaritons lateral quantization. • Both spectral and spatial distributions of these states in the microcavity were observed. • Lines with small orbital quantum numbers m < 10 were located closer to the center of the resonator, while lines corresponding to whispering gallery modes with m > 10 were concentrated near the edge of the resonator. Polariton photoluminescence from cylindrical microcavities was studied under optical excitation below and above a nonlinear regime threshold. Lines of lateral excitonic polaritons quantization were observed in the spectra. In addition to quantization lines with a small orbital quantum number m, exciton-polariton whispering gallery modes with large m > 10 were observed in the cavities of relatively large diameter. In addition to the spectral distribution of the polariton size quantized modes, it was possible to observe their wavefunctions' spatial distribution.