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Dzhun I. O. Babaitsev G. V. Kozin M. G. Romashkina I. L. Shanova E. I. Chechenin N. G. 《Physics of the Solid State》2021,63(6):825-831
Physics of the Solid State - The external factors which influence the ferromagnetic resonance (FMR) line width in bilayer (ferromagnet/antiferromagnet) exchange-biased systems are studied. The... 相似文献
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O. V. Kovalchukova A. I. Stash S. B. Strashnova E. P. Romashkina B. E. Za?tsev 《Crystallography Reports》2010,55(3):428-431
The complex compounds (H3
L · Cl)[CoCl4] (I) and H2
L[CuBr4] (II), where L is 2,4,6-tri(N,N-dimethylamino)methylphenol, were isolated in the crystalline state and studied by X-ray diffraction. The organic cations
were found to be outer-sphere ligands. All three nitrogen atoms of the tertiary amino groups are protonated. In compound I, the H3
L
3+ cation exists as the cis tautomer. In compound II, the H2
L
2+ dication exists as the trans isomer. In the crystal structure, the dications are arranged in layers via hydrogen bonds. 相似文献
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A. G. Majouga R. B. Romashkina A. S. Kashaev E. K. Beloglazkina A. A. Moiseeva N. V. Zyk 《Russian Chemical Bulletin》2011,60(2):261-268
A series of novel organic ligands with dipicolylamine and disulfide groups connected by polymethylene, alkylaryl, alkoxyaryl,
or alkoxycarbonyl linker was synthesized. The electrochemical study by cyclic voltammetry was carried out for two synthesized
ligands, and the formation of the complexes with Cu(MeCN)ClO4 in the solution or on the gold electrode surface was established. The complex of CuI with 1,24-bis[N,N-bis(2-pyridylmethyl)-glycinoyloxy]-12,13-dithiatetracosane chemisorbed on the Au electrode is capable of binding molecular
oxygen from solution. 相似文献
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Abstract We have investigated the effect of pressure on lattice parameters and Raman-active phonons of the molecular crystal xenon difluride by powder x-ray diffraction and first-order Raman scattering, respectively. The ambient pressure tetragonal crystal structure remains stable up to the maximum pressure of 50 GPa. The compressibility is found to be strongly anisotropic. The frequencies of the intramolecular A1g stretching mode and the Eg libration increase sublinearly under pressure. ding the a-and c-axis compression data, we have determined the dependence of phonon frequencies on lattice parameters. The high-frequency A1g mode shows a pronounced nonlinear scaling with c-axis lattice parameter, with particularly small changes during initial compression. This effect is attributed to the interplay between intra-and intermolecular interactions during compression 相似文献
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Elena K. Beloglazkina Alexander G. MajougaRenata B. Romashkina Anna A. MoiseevaNikolai V. Zyk 《Polyhedron》2007
A series of S-alkylated derivatives of 2-thiohydantoins, containing two 5-(3-pyridylmethylene)-3,5-dihydro-4H-imiazole-4-one fragments joined by polymethylene bridges with different numbers of carbon atoms, was synthesized. The title (5Z,5′Z)-2,2′-(alkane-α,ω-diylsulfanyldiyl)bis(5-(3-pyridylmethylene)-3,5-dihydro-4H-imidazol-4-ones) (L) were obtained by alkylation of 5-(3-pyridylmethylene)-3-phenyl-2-thiohydantoine by 1,2-dibromoethane, 1,6-dibromohexane or 1,10-dibromodecane in DMF in the presence of potassium carbonate. The complexes of ligands L with CoCl2 · 6H2O have been synthesized. It is shown that, regardless of the L:CoCl2 ratio, complexes with LCoCl2 composition are obtained in all cases. The structure of the cobalt(II) chloride complex with (5Z,5′Z)-2,2′-(ethane-1,2-diyldisulfanyldiyl)bis(5-(3-pyridylmethylene)-3-phenyl-3,5-dihydro-4H-imidazol-4-one) was determined by means of the RSA method. The cobalt atom in this complex has a tetrahedral ligand environment and it is coordinated by two chloride anions and two nitrogen atoms of pyridine fragments, forming a 19-membered metallocycle. Electrochemical investigations of the synthesized ligands and complexes have been made by CVA and RDE methods. It is established that the first stage of reduction for the complexes takes place on the metal, whereas the first stage of oxidation takes place on the coordinated chloride-anions. 相似文献
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O. V. Kovalchukova S. B. Strashnova E. P. Romashkina P. V. Strashnov B. E. Zaitsev V. S. Sergienko 《Crystallography Reports》2013,58(2):247-252
3-amino-4-hydroxy benzenesulfonamide and its hydrochloride have been isolated in the crystalline state. Their crystal and molecular structures are determined by X-ray diffraction. The equilibrium between neutral tautomeric forms of the 3-amino-4-hydroxy benzenesulfonamide molecule is studied within the approximation of density functional theory (B3LYP/aug-cc-pVDZ). The constants of acid-base equilibrium of 3-amino-4-hydroxy benzenesulfonamide are deter-mined using spectrophotometry. 相似文献
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Kolmychek I. A. Romashkina A. M. Maydykovskiy A. I. Gusev S. A. Gusev N. S. Sapozhnikov M. V. Golubev V. G. Murzina T. V. 《JETP Letters》2021,114(8):456-462
JETP Letters - Magneto-optical effects in metal–dielectric nanostructured materials based on opal films coated with a thin cobalt/silver nanolayer, whose surface has a close-packed hexagonal... 相似文献
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M. G. Kozin I. L. Romashkina 《Bulletin of the Russian Academy of Sciences: Physics》2010,74(3):330-334
The discovery of new iron-containing high-temperature superconductors is considered in relation to their studies by means of the Mössbauer effect. The importance of the relevant results for the problem of the coexistence of magnetism and superconductivity and the stability of superconductivity against to disorder is shown by analyzing the available literature data. 相似文献