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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Atuchin V. V., Isaenko L. I., Kesler V. G., Laptash N. M., Molokeev M. S.
Заглавие : Chemical bonding effect in complex oxyfluorides with transition metals
Коллективы : Russian-French workshop on Nanosciences and Nanotechnologies, Российская академия наук, Сибирское отделение РАН, Институт неорганической химии им. А.В. Николаева Сибирского отделения РАН, Институт катализа им. Г.К. Борескова Сибирского отделения РАН, Институт физики полупроводников им. А.В. Ржанова Сибирского отделения РАН
Место публикации : The 7th Russian-French workshop on Nanosciences and Nanotechnologies: Program and abstract book/ ed. A. V. Okotrub. - 2013. - P.29. - ISBN 978-5-901688-29-8
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasiliev A. D., Zel'bst E. A., Soldatenko A. S., Bolgova Yu.I., Trofimova O. M., Voronkov M. G.
Заглавие : Synthesis and molecular structure of cobalt(II) complex with 1-(1-silatranylmethyl)-1,2,4-triazole
Место публикации : Struct. Chem.: Springer/Plenum Publishers, 2013. - Vol. 24, Is. 4. - P.1001-1005. - ISSN 1040-0400, DOI 10.1007/s11224-012-0121-0
Примечания : Cited References: 24
Предметные рубрики: REACTIVITY
DERIVATIVES
CRYSTAL
SPECTRA
Ключевые слова (''Своб.индексиров.''): complexes--1-(1-silatranylmethyl)-1,2,4-triazole--cobalt dichloride--x-ray diffraction
Аннотация: Reaction of cobalt chloride with 1-(1-silatranylmethyl)-1,2,4-triazole in benzene afforded complex CoCl2 center dot 2L (L = 1-(1-silatranylmethyl)-1,2,4-triazole). It was isolated as the solvate [CoCl2 center dot 2L]center dot CH2Cl2 (1) by recrystallization from dichloromethane and structurally characterized by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P2(1)/m with a = 6.798(2) E, b = 20.326(5) E, c = 11.005(3) E, and Z = 4. The cobalt atom is in slightly distorted square-planar environment, coordinated to two nitrogen atoms from two ligands and two chloride ions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Antonova A. B., Chudin O. S., Vasiliev A. D., Rubaylo A. I., Verpekin V. V., Sokolenko W. A., Pavlenko N. I., Semeikin O. V.
Заглавие : Chemistry of vinylidene complexes. XX. Intramolecular carbonylation of vinylidene on the MnFe center: Spectroscopic and structural study. X-ray structure of the new trimethylenemethane type MnFe complex
Место публикации : J. Organomet. Chem.: Elsevier, 2011. - Vol. 696, Is. 4. - P.963-970. - ISSN 0022-328X, DOI 10.1016/j.jorganchem.2010.10.035
Примечания : Cited References: 52. - This work was partially supported by the Presidium of the Russian Academy of Sciences (Program for Basic Research, Project No. 7.18) and Russian Foundation for Basic Research (Grant No. 09-03-90745-mob_st). Authors are grateful to Prof. N.A. Ustynyuk for useful discussions, Dr. E.A. Shor and Dr. A.M. Shor for giving the data of quantum chemical study.
Предметные рубрики: MOLECULAR-STRUCTURE
ORGANOMETALLIC CHEMISTRY
TRICARBONYL COMPLEXES
UNSATURATED CARBENES
METAL VINYLIDENES
TRANSITION-METALS
ORGANIC-SYNTHESIS
CRYSTAL-STRUCTURE
IRON TRICARBONYL
MANGANESE
Ключевые слова (''Своб.индексиров.''): manganese--iron--carbonyl complexes--heteronuclear vinylidene complexes--intramolecular vinylidene carbonylation--trimethylenemethane complexes
Аннотация: Reactions of Fe-2(CO)(9) with Cp(CO)(2)Mn=C=CHPh (1) and Cp(CO)(PPh3)Mn=C=CHPh (3) gave the heterometallic trimethylenemethane complexes eta(4)-{C[Mn(CO)(2)Cp](CO)CHPh}Fe(CO)(3) (2) and eta(4)-{C[Mn(CO)(PPh3)Cp](CO)CHPh}Fe(CO)(3) (4), respectively. The formation of the benzylideneketene [PhHC=C=C=O] fragment included in complexes 2 and 4 occurs via intramolecular coupling of the carbonyl and vinylidene ligands. The structures of 3 and 4 were determined by single crystal XRD methods. The influence of the nature of the L ligands at the Mn atom on the structural and spectroscopic characteristics of eta(4)-{C[Mn(CO)(L)Cp](CO)CHPh}Fe(CO)(3) (L = CO (2), PPh3 (4)) is considered. According to the VT H-1 and C-13 NMR spectra, complex 2 reversibly transforms in solution into mu-eta(1):eta(1)-vinylidene isomer Cp(CO)(2)MnFe(mu-C=CHPh)(CO)(4) (2a), whereas complex 4 containing the PPh3 ligand is not able to a similar transformation. (C) 2010 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovnev N. N., Molokeev M. S., Golovneva I. I., Glushchenko G. A.
Заглавие : Crystal structure of enrofloxacinium tetrabromidodichloridostannate(IV) monohydrate
Место публикации : J. Struct. Chem.: SPRINGER, 2013. - Vol. 54, Is. 2. - P.377-382. - ISSN 0022-4766, DOI 10.1134/S0022476613020157
Примечания : Cited References: 17. - The work was supported by the grant of the President of the Russian Federation for the support of leading scientific schools of the Russian Federation (NSh-4828.2012.2) and the Federal Targeted Program "Scientific and Scientific Pedagogical Personnel of Innovative Russia, 2009-2013" (State contracts Nos. 02.740.11.0269 and 02.740.11.0629).
Предметные рубрики: COMPLEX
Ключевые слова (''Своб.индексиров.''): crystal structure--enrofloxacinium cation--tetrabromidodichloridostannate(iv) anion--hydrogen bonds
Аннотация: A new compound EnrH(3)[SnBr3.46Cl2.54]center dot H2O, where EnrH (3) (2+) is the enrofloxacinium cation (C19H24FN3O (3) (2+) ), is synthesized and its crystal and molecular structure is determined. Crystallographic data for enrofloxacinium tetrabromidodichloridostannate(IV) monohydrate are as follows: a = 17.1262(19) , b = 10.3435(11) , c = 17.2582(19) , beta = 119.203(1)A degrees, V = 2640.5(4) (3), space group P2(1)/c, Z = 4. Hydrogen bonds form a branched three-dimensional network linking EnrH (3) (2+) , [SnBr3.46Cl2.54](2-), and water molecules. The structure is also stabilized by the pi-pi interaction of EnrH (3) (2+) aromatic rings.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivanova N. B., Kazak N. V., Platunov M. S., Bayukov O. A., Nizhankovskii V. I., Zubavichus Y. V., Ovchinnikov S. G., Knyazev Yu.V.
Заглавие : The complex magnetic study of warwickite M[[p]]2+[[/p]]M[[p]]3+[[/p]]OBO[[d]]3[[/d]]
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - С. 196. - ISBN 978-5-7444-3124-2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Muzalevskiy K. V.
Заглавие : Spaceborne radar monitoring of soil freezing/thawing processes in the Arctic tundra
Место публикации : Russ. Phys. J.: SPRINGER, 2013. - Vol. 55, Is.8. - P.899-902. - ISSN 1064-8887, DOI 10.1007/s11182-013-9898-6
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): active topsoil--complex dielectric constant, arctic tundra--freezing/thawing soil--radar backscattering coefficient--soil temperature
Аннотация: In this article, the possibility of measuring the average temperature in the active topsoil of the Arctic tundra from the temperature dependence of the radar backscattering coefficient is theoretically studied. The radar backscattering coefficient is simulated by the small perturbation method at a frequency of 1.26 GHz of radars placed onboard ALOS-2 and SMAP satellites. In simulation, the soil density, surface roughness, and temperature and moisture profiles measured in situ at the biosphere station Franklin Bluffs, Alaska (69В°39? N, 148В°43? W), from August 1, 2000 to July 1, 2001 were used. The soil permittivity was calculated for the generalized temperature-dependent refractive mixing dielectric model for organic rich soil whose sample was taken on the Alaska North Slope (68В°38?N, 149В°35?W). This model allows the complex dielectric constant of moist thawed and frozen soil to be calculated at temperatures in the range from -30В°S{cyrillic} to +25В°S{cyrillic}. It is demonstrated that the radar backscattering coefficient is correlated with the topsoil temperature with the error less than 5.7В°S{cyrillic} during the entire period of freezing and thawing. В© 2013 Springer Science+Business Media New York.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Bobrov P. P., Fomin S. V.
Заглавие : Multirelaxation generalized refractive mixing dielectric model of moist soils
Место публикации : IEEE Geosc. Remote Sens. Letters. - 2013. - Vol. 10, Is. 3. - Ст.6332477. - P.603-606. - ISSN 1545-598X, DOI 10.1109/LGRS.2012.2215574
Ключевые слова (''Своб.индексиров.''): bound soil water--dielectric model--dielectric relaxations--dielectric spectra--free soil water--moist soil--bound waters--complex dielectric constant--debye relaxation--dielectric models--dielectric spectra--dipole relaxation--frequency ranges--gigahertz frequencies--gigahertz range--moist soil--soil water--spectroscopic parameters--water molecule--dielectric relaxation--mixing--molecules--soil moisture--geologic models
Аннотация: In this letter, a multirelaxation generalized refractive mixing dielectric model (GRMDM) for moist soil is proposed and substantiated in the frequency range from 0.04 to 26.5 GHz. This model is based on the methodology of a single-relaxation GRMDM which accounts only for the dipole relaxation of water molecules in the gigahertz frequency range. The proposed multirelaxation GRMDM takes into account both the dipole (Debye) and ionic (Maxwell-Wagner) relaxations of soil water molecules. For this purpose, it uses a two-frequency Debye relaxation equation for the dielectric spectra of bound water. The spectroscopic parameters of the multirelaxation GRMDM were derived by fitting the spectra calculated by this model to the respective measured ones. The main advantage of this model is that it predicts the complex dielectric constant of moist soils throughout the megahertz and gigahertz frequency ranges with the same error as the single-relaxation GRMDM does only in the gigahertz range.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Astakhov A. M., Vasiliev A. D.
Заглавие : X-Ray structure of the complex of 5-nitrimino-1,4H-1,2,4-triazole and DMSO
Коллективы : Seminar on New Trends in Research of Energetic Materials (16; 2013 ; Apr. ; 10-12; Pardubice, Czech Republic)
Место публикации : New Trends in Res. of Energetic Mater.: Proceedings. - 2013. - P.466-473
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasiliev A. D., Golovnev N. N.
Заглавие : Crystal structure of hexakis(thiourea)-bis((μ-perchlorato-O,O')- (perchlorato-O)-bismuth) diperchlorate
Место публикации : Russ. J. Coordin. Chem. - 2013. - Vol. 39, Is. 2. - P.161-164. - ISSN 1070-3284, DOI 10.1134/S1070328413020097
Ключевые слова (''Своб.индексиров.''): crystallographic data--hydrogen atoms--hydrogen bond networks--ir and raman spectroscopy--space groups--sulfur atoms--atoms--complex networks--hydrogen bonds--raman spectroscopy--single crystals--x ray diffraction--thioureas
Аннотация: The complex[Bi2(Tu)6(ClO4) 4](ClO4)2 (I) (Tu is thiourea) was synthesized and studied by X-ray diffraction. The crystallographic data of I are: a = 14.205(1) A, b = 13.083(1) A, c = 22.078(2) A, ? = 96.182(1), V = 4079.1(7) A3, space group C2/c, Z = 4. The molecule is located on a twofold axis and consists of the binuclear cation [Bi2(Tu)6(ClO4)4]2+ and two outer-sphere anions Cl 4 -. The Bi-S bond lengths are 2.61-2.62 A. For each terminal and bridging ClO 4 - ion, one Bi-O distance varies from 2.744 to 3.048 3.269 structure contains a hydrogen bond network involving all hydrogen atoms. The IR and Raman spectroscopy data confirm the thiourea coordination by the sulfur atom. В© 2013 Pleiades Publishing, Ltd.
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10.

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Korshunov M. M., Togushova Yu. N., Eremin I., Hirschfeld P. J.
Заглавие : Spin-orbit coupling in Fe-based superconductors
Коллективы : Quantum in Complex Matter: Superconductivity, Magnetism and Ferroelectricity, International Conference (May 27 - June 1 2013; Ischia, Italy)
Место публикации : Quant. in Complex Matter: Supercond., Magnet. and Ferroelectr. - Rome, 2013. - P.134. - ISBN 978-88-6683-016-0
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovnev N., Molokeev M. S.
Заглавие : Bridging behaviour of the 2-thiobarbiturate anion in its complexes with LiI and NaI
Место публикации : Acta Crystallographica Section C Crystal Structure Communications. - 2013. - Vol. 69, Pt. 7. - P.704-708. - ISSN 0108-2701, DOI 10.1107/S0108270113014078
Ключевые слова (''Своб.индексиров.''): 2-thiobarbituric acid--coordinated water--dihydrates--edge sharing--hydrogen bonding interactions--three-dimensional networks--atoms--complex networks--hydrogen bonds--ligands--negative ions--positive ions--three dimensional--lithium
Аннотация: The structures of the LiI and NaI salts of 2-thiobarbituric acid (2-sulfanylidene-1-3-diazinane-4,6-dione, H 2TBA) have been studied. μ-Aqua-octaaquabis(μ-2- thiobarbiturato-κ2 O:O′)bis(2-thiobarbiturato-κO) tetralithium(I) dihydrate, [Li4(C4H3N 2O2S)4(H2O)9]·2H 2O, (I), crystallizes with four symmetry-independent four-coordinated LiI cations and four independent HTBA- anions. The structure contains two structurally non-equivalent LiI cations and two non-equivalent HTBA- anions (bridging and terminal). Eight of the coordinated water ligands are terminal and the ninth acts as a bridge between LiI cations. Discrete [Li4(HTBA)4(H2O)9] ·2H2O complexes form two-dimensional layers. Neighbouring layers are connected via hydrogen-bonding interactions, resulting in a three-dimensional network. Poly[μ2-aqua-tetraaqua(μ4-2- thiobarbiturato-κ4 O:O:S:S)(μ2-thiobarbiturato- κ2 O:S)disodium(I)], [Na2(C4H 3N2O2S)2(H2O) 5] n , (II), crystallizes with six-coordinated NaI cations. The octahedra are pairwise connected through edge-sharing by a water O atom and an O atom from the μ4-HTBA- ligand, and these pairs are further top-shared by the S atoms to form continuous chains along the a direction. Two independent HTBA- ligands integrate the chains to give a three-dimensional network. © 2013 International Union of Crystallography.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mironov V. L., Molostov I. P., Lukin Y. I., Karavaisky A. Yu.
Заглавие : Method of retrieving permittivity from S12 element of the waveguide scattering matrix
Коллективы : International Siberian Conference on Control and Communications
Место публикации : Int. Sib. Conf. on Control and Communicat.: Proc. - 2013. - Ст.6693613. - ISSN 978-1-4799-1060-1, DOI 10.1109/SIBCON.2013.6693609. - ISSN 978-14799-1062-5
Примечания : Загл. с этикетки диска
Ключевые слова (''Своб.индексиров.''): complex refractive index (cri)--dielectric spectroscopy--moist soil
Аннотация: In this paper, a numerical method of retrieving the complex dielectric permittivity from the S12 element of the waveguide scattering matrix. Analysis showed that the numerical method proposed provides for the permittivity which has the error less than 10% in the frequency range from 0.345 to 15 GHz. This error is substantially less than the one attained in the existing method currently used. © 2013 IEEE.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Voronkov M. G., Zel'bst E. A., Vasiliev A. D., Soldatenko A. S., Bolgova Y. I., Trofimova O. M.
Заглавие : Crystal and molecular structure of the complex of 2-(1-silatranylmethylthio)-4,5-benzo-1,3-thiazole with CoCl2 and MeCN
Место публикации : J. Struct. Chem.: SPRINGER, 2012. - Vol. 53, Is. 1. - P.193-196. - ISSN 0022-4766, DOI 10.1134/S0022476612010271
Примечания : Cited References: 11
Ключевые слова (''Своб.индексиров.''): 2-(1-silatranylmethylthio)-4,5-benzo-1,3-thiazole--acetonitrile--molecular structure--single crystal x-ray diffraction analysis
Аннотация: The crystal and molecular structure of the complex of 2-(1-silatranylmethylthio)-4,5-benzo-1,3-thiazole with CoCl2 and MeCN (I) is determined by single crystal X-ray diffraction. The geometry of the silatranylmethyl moiety in complex I is compared to the geometry of 1-(2'-benzthiazolylthiomethyl) silatrane. Molecular packing in the crystal is analyzed.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Voronkov M. G., Zel'bst E. A., Vasiliev A. D., Soldatenko A. S., Bolgova Y. I., Trofimova O. M.
Заглавие : Crystal and molecular structure of the complex of N-(1-silatranylmethyl)-3,5-dimethylpyrazole with cobalt dichloride
Место публикации : J. Struct. Chem.: Springer, 2012. - Vol. 53, Is. 3. - P.614-617. - ISSN 0022-4766, DOI 10.1134/S0022476612030316
Примечания : Cited References: 11
Ключевые слова (''Своб.индексиров.''): n-(1-silatranylmethyl)-3,5-dimethylpyrazole--cobalt dichloride--molecular structure--single crystal x-ray diffraction
Аннотация: X-ray diffraction is used to determine the crystal and molecular structure of the complex of N-(1-silatranylmethyl)-3,5-dimethylpyrazole with cobalt dichloride (I). This is yet another example of the participation of the endocyclic oxygen atom of the silatrane fragment in complexation with a metal atom. Metal dichloride interconnects two heterocyclic systems of dimethylpyrazole (DMP) and silatrane (Sa). The coordination polyhedron of the cobalt atom is a tetrahedron.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chudin O. S., Verpekin V. V., Burmakina G. V., Vasiliev A. D., Pavlenko N. I., Rubaylo A. I.
Заглавие : Chemistry of vinylidene complexes. XXII. Synthesis and physicochemical properties of the binuclear vinylidene complex [Cp(CO)(2)ReCu(mu-C=CHPh)(mu-Cl)](2). Molecular structure of the new rheniumcopper complex
Коллективы : Presidium of the Russian Academy of Sciences [8.15]
Место публикации : J. Organomet. Chem.: Elsevier Science, 2014. - Vol. 757. - P.57-61. - ISSN 0022-328X, DOI 10.1016/j.jorganchem.2013.12.050. - ISSN 1872-8561
Примечания : Cited References: 19. - This work was financially supported by the Presidium of the Russian Academy of Sciences (Program for Basic Research, Project No. 8.15).
Предметные рубрики: LIGANDS
Ключевые слова (''Своб.индексиров.''): rhenium--copper--vinylidene complexes--heterometallic complexes--x-ray structure--cyclic voltammetry
Аннотация: The interaction between Cp(CO)2ReCCHPh (1) and CuCl results in the new heterometallic μ-vinylidene complex [Cp(CO)2ReCu(μ2-CCHPh)(μ2-Cl)]2 (2) characterized earlier by IR and 1H, 13C NMR spectra. The molecular structure of compound 2 has been determined by X-ray diffraction analysis, revealing a dimer structure with two binuclear fragments linked to each other by asymmetric chloride bridges. The electrochemical behavior of 2 in acetonitrile was studied by cyclic voltammetry at a Pt-electrode.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lykhin A. O., Novikova G. V., Kuzubov A. A., Staloverova N. A., Sarmatova N. I., Varganov S. A., Krasnov P. O.
Заглавие : A complex of ceftriaxone with Pb(II): synthesis, characterization, and antibacterial activity study
Коллективы : RFBR [14-03-31, 170 MOJI_a]
Место публикации : J. Coord. Chem.: Taylor & Francis, 2014. - Vol. 67, Is. 16. - З2783-2794. - ISSN 0095-8972, DOI 10.1080/00958972.2014.938065. - ISSN 1029-0389
Примечания : Cited References: 48. - The reported study was supported by RFBR, research project No. 14-03-31, 170 MOJI_a and Krasnoyarsk regional fund for supporting scientific and technological activities. We thank the Center for Equipment Joint Use of the Siberian Federal University. We are grateful to the HPC Research Departments of Siberian Federal University and Moscow University Supercomputing Center (SKIF MSU "Chebyshev") for the access to the high-performance computer clusters.
Предметные рубрики: BETA-LACTAM ANTIBIOTICS
TERNARY COMPLEX
METAL-COMPLEXES
BASIS-SETS
3 DECADES
RESISTANCE
COPPER(II)
CEPHALOSPORINS
EVOLUTION
1ST-ROW
Ключевые слова (''Своб.индексиров.''): ceftriaxone lead(ii) complex--dft--ir spectroscopy--tga--antibacterial screening
Аннотация: A Pb(II) complex with ceftriaxone (H2Ceftria) antibiotic was synthesized by reaction of ceftriaxone disodium salt (hemi)heptahydrate with lead nitrate in water–ethanol medium. The complex was characterized on the basis of complexometric titration, spectrophotometric and thermogravimetric analyses, capillary electrophoresis, IR, Raman and UV–vis spectroscopies, and density functional theory calculations. Pb(II) is five-coordinate with distorted square pyramidal geometry. The coordination of Ceftria2− to Pb(II) occurs through N and O of the triazine, lactam carbonyl, carboxylate, and amine groups. The antibacterial activity study showed that Klebsiella pneumoniae is resistant to [Pb(Ceftria)]·3H2O. The antibacterial activity of [Pb(Ceftria)]·3H2O against Staphylococcus aureus is reduced compared with ceftriaxone. In contrast, the antibacterial activity of [Pb(Ceftria)]·3H2O against Escherichia coli is 28% higher than that of ceftriaxone antibiotic.
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Sadreev A. F., Bulgakov E. N., Maksimov D. N., Pichugin K. N.
Заглавие : Symmetry breaking in open quantum nonlinear systems
Место публикации : Nonlinear phenomena in complex systems: from nano to macro scale: Springer, 2015. - P.235-252. - (NATO science for peace and security series C: Environmental security). - DOI 10.1007/978-94-017-8704-8_17. - ISBN 978-94-017-8704-8. - ISBN 978-94-017-8703-1
Аннотация: We consider symmetry breaking in the simplest open quantum nonlinear systems such as dimer and plaquette of four nonlinear sites coupled with linear tight-binding wires. If the solution is stationary, the total Hilbert space can be projected into the inner states of the dimer or plaquette by the Feshbach procedure. That derives a nonlinear analogue of the Lippmann-Schwinger equation with injected wave as a source. By neglecting radiation shifts the Lippmann-Scwinger equation limits to the coupled mode theory equations widely used in optics. We show three scenarios for the transmission through the nonlinear quantum systems. The first one inherits the linear case and preserves the symmetry. In the second scenario the symmetry is broken because of different intensities at the dimer sites. In the third scenario the intensities at the sites are equaled but phases of complex wave function are different. That results in a vortical power flow between the nonlinear sites similar to the DC Josephson current. We show how the phenomenon of symmetry breaking can used for switching of outputs symmetrically coupled to the quantum dimer . Also we reveal a domain in the parameter space where none of stationary solutions exist. As a result injection of a monochromatic symmetric wave gives rise to emission of nonsymmetric satellite waves with energies different from the energy of the incident wave. Thus, the response exhibits non monochromatic behavior.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Molokeev M. S., Misjul S. V., Flerov I. N., Laptash N. M.
Заглавие : Reconstructive phase transition in (NH4)3TiF7 accompanied by the ordering of TiF6 octahedra
Место публикации : Acta Crystallogr. B: Wiley-Blackwell, 2014. - Vol. 70. - P.924-931. - ISSN 0108-7681, DOI 10.1107/S2052520614021192. - ISSN 1600-5740
Примечания : This study was supported by Russian Fund of Basic Research, project No. 12-02-00056 a
Предметные рубрики: CRYSTAL-STRUCTURE
NEUTRON-DIFFRACTION
POWDER DIFFRACTION
FLUORIDES
DISORDER
MECHANISM
PATHWAYS
COMPLEX
LI3THF7
ALPHA
Ключевые слова (''Своб.индексиров.''): reconstructive phase transition--ammonium heptafluorotitanate--order-disorder transition
Аннотация: An unusual phase transition P4/mnc →Pa3 has been detected after cooling the (NH4)3TiF7 compound. Some TiF6 octahedra, which are disordered in the room-temperature tetragonal structure, become ordered in the low-temperature cubic phase due to the disappearance of the fourfold axis. Other TiF6 octahedra undergo large rotations resulting in huge displacements of the F atoms by 1.5-1.8 Å that implies a reconstructive phase transition. It was supposed that phases P4/mbm and Pm3m could be a high-temperature phase and a parent phase, respectively, in (NH4)3TiF7. Therefore, the sequence of phase transitions can be written as Pm3m → P4/bm → P4/mnc → Pa3. The interrelation between (NH4)3TiF7, (NH4)3GeF7 and (NH4)3PbF7 is found, which allows us to suppose phase transitions in relative compounds.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovnev N. N., Molokeev M. S., Vereshchagin S. N., Atuchin V. V.
Заглавие : Synthesis and thermal transformation of a neodymium(III) complex [Nd(HTBA)2(C2H3O2)(H2O)2]·2H2O to non-centrosymmetric oxosulfate Nd2O2SO4
Коллективы : Ministry of Education and Science of the Russian Federation
Место публикации : J. Coord. Chem.: Taylor & Francis, 2015. - Vol. 68, Is. 11. - P.1865-1877. - ISSN 0095, DOI 10.1080/00958972.2015.1031119. - ISSN 10290389(eISSN)
Примечания : Cited References:59. - The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering at the Siberian Federal University in 2014. V.V.A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of this investigation.Cover image: Artwork representing main idea of this article
Предметные рубрики: THIOBARBITURIC ACID COMPLEXES
TRANSITION-METAL-COMPLEXES
Ключевые слова (''Своб.индексиров.''): neodymium--2-thiobarbituric acid--crystal structure--thermal--decomposition--ir spectroscopy
Аннотация: Neodymium complex [Nd(HTBA)2(C2H3O2)(H2O)2]n·2nH2O (1) (H2TBA = 2-thiobarbituric acid, C4H4N2O2S) has been synthesized in an aqueous solution at 80–90 °C. The crystal structure of 1 has been determined by the Rietveld method in space group P21/n, a = 8.5939(2), b = 22.9953(5), c = 10.1832(2) Å, β = 112.838(1)°, Z = 4, and R = 0.0181. In 1, the Nd(III) is coordinated by four μ2-HTBA– ions through O, three oxygens from two μ2-η2 : η1-bridging CH3COO– anions, and two terminal waters with a tri-capped trigonal prism structure. The prisms form an edge-contact pair through two O from two acetates. The pairs are connected by HTBA– and form a 3-D framework. The principle product of thermal decomposition of 1 at 750 °C is Nd2O2SO4 (2). The crystal structure of 2 has been obtained in space group I222, a = 4.1199(4), b = 4.2233(4), c = 13.3490(12) Å, Z = 2, and R = 0.0246. The structure is related to an orthorhombic structure type of M2O2SO4 (M = Ln) compounds. In 2, the Nd3+ is coordinated by six oxygens in a trigonal prism. Each NdO6 prism links with two SO4 tetrahedra by nodes, with four other NdO6 prisms by edges, and with four other NdO6 prisms by nodes, and the units form the 3-D frame. In the frame, the layers of SO4 tetrahedra are alternated by two NdO6 prism layers.
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