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Antioxidant Activity and Toxicity of Fullerenols via Bioluminescence Signaling: Role of Oxygen Substituents / E. S. Kovel [et al.] // Int. J. Mol. Sci. - 2019. - Vol. 20, Is. 9. - Ст. 2324, DOI 10.3390/ijms20092324. - Cited References: 74. - This work was supported by PRAN-32, Program: 'Nanostructures: physics, chemistry, biology, technological basis'; RFBR 18-29-19003; RFBR-Krasnoyarsk Regional Foundation 18-44-240004, Tomsk Polytechnic University CE Program. . - ISSN 1422-0067
Кл.слова (ненормированные):
bioactive compound -- fullerenol -- antioxidant activity -- toxicity -- reactive oxygen species -- bioluminescence bioassay
Аннотация: Fullerenols are nanosized water-soluble polyhydroxylated derivatives of fullerenes, a specific allotropic form of carbon, bioactive compounds, and perspective basis for drug development. Our paper analyzes the antioxidant activity and toxicity of a series of fullerenols with different number of oxygen substituents. Two groups of fullerenols were under investigation: (1) C60Oy(OH)(x), C60,70Oy(OH)(x), where x+y = 24-28 and (2) C60,70Oy(OH)(x), Fe0,5C60Oy(OH)(x), Gd@C82Oy(OH)(x), where x+y = 40-42. Bioluminescent cellular and enzymatic assays (luminous marine bacteria and their enzymatic reactions, respectively) were applied to monitor toxicity in the model fullerenol solutions and bioluminescence was applied as a signaling physiological parameter. The inhibiting concentrations of the fullerenols were determined, revealing the fullerenols' toxic effects. Antioxidant fullerenol' ability was studied in solutions of model oxidizer, 1,4-benzoquinone, and detoxification coefficients of general and oxidative types (D-GT and D-OxT) were calculated. All fullerenols produced toxic effect at high concentrations (>0.01 g L-1), while their antioxidant activity was demonstrated at low and ultralow concentrations (<0.001 g L-1). Quantitative toxic and antioxidant characteristics of the fullerenols (effective concentrations, concentration ranges, D-GT, and D-OxT) were found to depend on the number of oxygen substituents. Lower toxicity and higher antioxidant activity were determined in solutions of fullerenols with fewer oxygen substituents (x+y ⋍ 24-28). The differences in fullerenol properties were attributed to their catalytic activity due to reversible electron acceptance, radical trapping, and balance of reactive oxygen species in aqueous solutions. The results provide pharmaceutical sciences with a basis for selection of carbon nanoparticles with appropriate toxic and antioxidant characteristics. Based on the results, we recommend, to reduce the toxicity of prospective endohedral gadolinium-fullerenol preparations Gd@C82Oy(OH)(x), decreasing the number of oxygen groups to x+y ⋍ 24-28. The potential of bioluminescence methods to compare toxic and antioxidant characteristics of carbon nanostructures were demonstrated.

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Держатели документа:
Institute of Biophysics SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Institute of Physics SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Kovel, E. S.; Ковель, Екатерина Сергеевна; Sachkova, A. S.; Vnukova, N. G.; Внукова, Наталья Григорьевна; Churilov, G. N.; Чурилов, Григорий Николаевич; Knyazeva, E. M.; Kudryasheva, N. S.
}
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    Bis(μ3-barbiturato−O,O,O′)-(μ2-aqua)- aqua-barium(II): crystal structure, spectroscopic and thermal properties / L. A. Solovyov [et al.] // J. Coord. Chem. - 2017. - Vol. 70, Is. 12. - P. 1984-1993, DOI 10.1080/00958972.2017.1319943. - Cited References: 21 . - ISSN 0095-8972
   Перевод заглавия: Бис(μ3-барбитурат-O,O,O')-(μ2-аква)-аква-бария(II): Кристаллическая структура, спектроскопические и термические свойства
Кл.слова (ненормированные):
Barbituric acid -- barium -- coordination compound -- X-ray diffraction -- infrared spectroscopy -- thermal analysis
Аннотация: A polymeric coordination compound, [Ba(H2O) 2(Hba)2] (1) (H2ba – barbituric acid, C4H4N2O3), was obtained. The structure of 1 was solved using powder X-ray diffraction methods. The Ba2+ ion in 1 formed a three-capped trigonal prism. The BaO9 polyhedra, connected with each other by the edges and faces, formed a chain. Several 4- and 12-membered cycles due to the bridging μ2-H2O and bridging μ3-Hba– also formed implementing a 3-D polymer structure. The structures of 1 and other thiobarbiturate complexes were compared. The replacement of a S atom by an O atom in the heterocyclic ligand Htba− (thiobarbiturate ion) of the compound Ba(H2O)2(Htba)2 resulted in changes of the coordination number Ba(II) and supramolecular structure. The intermolecular hydrogen bonds O–H⋯O and N–H⋯O formed a 3-D net where pronounced 2-D layers of Hba– ions could be found. A new topological net in 1 was observed. The IR and thermal stability were investigated.

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Держатели документа:
Institute of Chemistry and Chemical Technology, SB RAS, FRC “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Department of Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Solovyov, L. A.; Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.
}
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Val'kov, V. V.
Coexistence of superconductivity and antiferromagnetism in heavy-fermion intermetallic compound CeRhIn5 / V. V. Val'Kov, A. O. Zlotnikov // J. Supercond. Nov. Magn. - 2013. - Vol. 26, Is. 9. - P. 2885-2886, DOI 10.1007/s10948-013-2222-4 . - ISSN 1557-1939
Кл.слова (ненормированные):
Coexistence superconductivity antiferromagnetism -- Heavy-fermion systems -- Periodic Anderson model
Аннотация: An interference of heavy-fermion superconductivity (SC) and antiferromagnetism (AFM) has been studied in the framework of the periodic Anderson model with the superexchange interaction between localized electrons. It has been shown that pressure-induced energy change of the localized states leads to modifying antiferromagnetic and superconducting order parameters. Conditions have been found for the coexistence of SC and AFM in the model. Theoretical results of the pressure effects on the ground state character of the heavy-fermion systems are in good agreement with experimental data for a rare-earth intermetallic compound CeRhIn5. The divergence of the effective electron mass produced by suppressing the long-range antiferromagnetic order has also been analyzed in the same framework. В© 2013 Springer Science+Business Media New York.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk, Russia;

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович
}
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Coexisting 1D and 3D magnetic interactions in the insulating copper-oxygen compound CuB2O4 / M. . Boehm [et al.] // Physica B. - 2006. - Vol. 378-80: International Conference on Strongly Correlated Electron Systems (SECES 05) (JUL 26-30, 2005, Vienna, AUSTRIA). - P. 1128-1129, DOI 10.1016/j.physb.2006.01.540. - Cited References: 8 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
SPIN-WAVE SPECTRUM
PHASE 10 K
METABORATE
Кл.слова (ненормированные):
cuprates -- magnetic soliton lattice -- Heisenberg exchange -- low-dimensional excitations -- Cuprates -- Heisenberg exchange -- Low-dimensional excitations -- Magnetic soliton lattice -- Dispersions -- Insulating materials -- Magnetic properties -- Neutron scattering -- Positive ions -- Cuprates -- Heisenberg exchange -- Low-dimensional excitations -- Magnetic soliton lattice -- Copper compounds
Аннотация: We performed inelastic neutron scattering measurements on CuB2O4 with a magnetic field applied in the tetragonal basal plane. The spin dynamics in this cuprate is determined by the interplay of two magnetic Cu2+ subsystems, the magnetic cage with predominant 3d Heisenberg exchange and quasi Id zig-zag chains. The comparison of the dispersion spectra along the chain direction in zero field and under applied field suggests a decoupling of the two magnetic sublattices under field. (c) 2006 Elsevier B.V. All rights reserved.

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Держатели документа:
Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
Paul Scherrer Inst, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
Russian Acad Sci, Inst Phys, SB, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institut Laue Langevin, 6, rue Jules Horowitz, F-38042 Cedex 9, France
Laboratory of Neutron Scattering, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
Institute of Physics, SB RAS, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Boehm, M.; Roessli, B.; Schefer, J.; Ouladdiaf, B.; Kulda, J.; Petrakovskii, G. A.; Петраковский, Герман Антонович
}
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Commensurate spin density wave in LaFeAsO: A local probe study / H. H. Klauss [et al.] // Phys. Rev. Lett. - 2008. - Vol. 101, Is. 7. - Ст. 77005, DOI 10.1103/PhysRevLett.101.077005. - Cited References: 28 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
LAYERED QUATERNARY COMPOUND
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Arsenic compounds -- Chlorine compounds -- Ferromagnetism -- Magnetic materials -- Magnetic properties -- Magnetization -- Magnets -- Molybdenum -- Phase transitions -- Spin density waves -- Commensurate spin density wave -- External fields -- Magnetic orders -- Muon spin relaxations -- Order parameter -- Ordered moments -- Probe measurements -- Ssbauer spectroscopy -- Structural phase transition -- Sublattice magnetizations -- Temperature dependences -- Spin dynamics
Аннотация: We present a detailed study on the magnetic order in the undoped mother compound LaFeAsO of the recently discovered Fe-based superconductor LaFeAsO(1-x)F(x). In particular, we present local probe measurements of the magnetic properties of LaFeAsO by means of (57)Fe Mossbauer spectroscopy and muon-spin relaxation in zero external field along with magnetization and resistivity studies. These experiments prove a commensurate static magnetic order with a strongly reduced ordered moment of 0.25(5)mu(B) at the iron site below T(N)=138 K, well separated from a structural phase transition at T(S)=156 K. The temperature dependence of the sublattice magnetization is determined and compared to theory. Using a four-band spin density wave model both, the size of the order parameter and the quick saturation below T(N) are reproduced.

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Держатели документа:
[Klauss, H. -H.] Tech Univ Dresden, Inst Festkorperphys, D-01069 Dresden, Germany
Amato, A.] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Buechner, B.] Leibniz Inst Festkorper & Weskstoffforsch IFW, D-01171 Dresden, Germany
Kraken, M.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys Kondensierten Mat, D-38106 Braunschweig, Germany
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany
Institut fur Festkorperphysik, TU Dresden, D-01069 Dresden, Germany
Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Leibniz-Institut fur Festkorper- und Werkstoffforschung (IFW) Dresden, D-01171 Dresden, Germany
Institut fur Physik der Kondensierten Materie, TU Braunschweig, D-38106 Braunschweig, Germany
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institut fur Mathematische Physik, TU Braunschweig, D-38106 Braunschweig, Germany

Доп.точки доступа:
Klauss, H. H.; Luetkens, H.; Klingeler, R.; Hess, C.; Litterst, F. J.; Kraken, M.; Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Drechsler, S. L.; Khasanov, R.; Amato, A.; Hamann-Borrero, J. E.; Leps, N.; Kondrat, A.; Behr, G.; Werner, J.; Buchner, B.
}
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Vasilovskaya, V. G.
Compound echo produced by an incoherent sequence of paired pulses / V. G. Vasilovskaya, V. I. Tsifrinovich // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 7. - P. 2200-2203. - Cited References: 7 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
SUPERPOSITION

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Доп.точки доступа:
Tsifrinovich, V. I.; Цифринович, Владимир Ильич
}
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    Kirenskii, L. V.
    Domain structure of double layer single crystal films of iron / L. V. Kirensky, V. G. Pynko, L. M. Obrastsova // Czech. J. Phys. - 1971. - Vol. B21, no. 4-5. - P. 513-515 . - ISSN 0011-4626
   Перевод заглавия: Доменная структура двухслойных монокристаллических пленок железа
Рубрики:
SPIN-PEIERLS TRANSITION
   COMPOUND CUGEO3
   SYSTEM CUGEO3
   STATE
Аннотация: The magnetostriction of CuGcO(3) single crystals has been measured in the temperature range from 5 to 16 K in magnetic fields up to 12 T. Giant values of the magnetostrictive strains along the b-axis is observed near the phase transition from the dimerized phase to the high field magnetic phase. The field induced magnetostriction in the antiferromagnetic phase is considerably smaller than in the dimerized phase.

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Доп.точки доступа:
Pynko, V. G.; Пынько, Виталий Григорьевич; Obrastsova, L. M.; Киренский, Леонид Васильевич
}
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Electro-optical and dielectric properties of polymer-stabilized blue phase liquid crystal impregnated with a fluorine-containing compound / P. C. Wu [et al.] // J. Mol. Liq. - 2018. - Vol. 267. - P. 138-143, DOI 10.1016/j.molliq.2017.12.062. - Cited References: 47. - The authors are indebted to Prof. Mon-Juan Lee of Chang-Jung Christian University for valuable discussions on photopolymerization. This work was financially supported by the Ministry of Science and Technology, Taiwan, through Grant Nos. 104-2112-M-009-008-MY3 and 106-2923-M-009-002-MY3, and by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects 16-42-240704 and 17-42-240464. . - ISSN 0167-7322. - ISSN 1873-3166

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
HYSTERESIS
TEMPERATURE
MONOMERS
Кл.слова (ненормированные):
Polymer-stabilized blue phase -- Liquid crystal -- Fluorine-containing -- compound -- Operating voltage -- Ionic effect
Аннотация: The effects of a fluorine-containing compound (4,4′-difluorobenzophenone; DF) on the electro-optical and dielectric properties of polymer-stabilized blue phase (PSBP) liquid crystals were investigated. When a PSBP cell was driven by an in-plane electric field, the addition of DF up to 2.7 wt% effectively reduced the operation voltage by ~ 30%. Further inspection by dielectric spectroscopy indicated that the ionic concentration in PSBP decreased with increasing loading of DF. This finding can be ascribed to the complexation of impurity ions near the ketone group and carbon–fluorine bonds of the DF compound that restrained the ion transport after photopolymerization. As a result, the DF compound can be regarded as a superior ion-suppressor, enabling the reduction in the ionic effect and, in turn, the promotion of the electro-optical response of a PSBP.

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Держатели документа:
Natl Chiao Tung Univ, Coll Photon, Inst Imaging & Biomed Photon, Tainan 71150, Taiwan.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Wu, Po-Chang; Chen, Hsin-Li; Rudakova, Natalya V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Lee, Wei; Ministry of Science and Technology, Taiwan [104-2112-M-009-008-MY3, 106-2923-M-009-002-MY3]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-240704, 17-42-240464]
}
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EPR Study of Solid Solutions Based on the Compound ScF3 [Text] / Voronov V.N., Petrakovskaya E.A., Alexandrovskaya A.V. // Functional Materials. - 2010. - Vol. 17, Is. 3. - P324-328

Доп.точки доступа:
Voronov, V. N.; Воронов Владимир Николаевич; Petrakovskaya, E. A.; Петраковская Элеонора Анатольевна; Alexandrovskaya, A. V.
}
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10.

EPR study of solid solutions, based on the compound ScF3 [Text] / V. N. Voronov, E. A. Petrakovskaya, A. V. Alexandrovskaya // International Conference "Functional Materials" (ICFM-09) : book of abstracts : october 5-10, Ukraine, Crimea, Partenit. - 2009. - P61

Доп.точки доступа:
Voronov, V.N.; Petrakovskaya, E.A.; Alexandrovskaya, A.V.; "Functional Materials", International Conference(4 ; 2009 ; OCT ; Partenit, Crimea, Ukraine)
}
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11.

Aplesnin, S. S.
Existence of massive singlet excitations in an antiferromagnetic alternating chain with S=1/2 / S. S. Aplesnin // Phys. Rev. B. - 2000. - Vol. 61, Is. 10. - P. 6780-6784, DOI 10.1103/PhysRevB.61.6780. - Cited References: 26 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
PEIERLS COMPOUND CUGEO3
SPIN SYSTEMS
TRANSITION
Аннотация: The one-dimensional Heisenberg model with alternating antiferromagnetic bond and spin-1/2 has been studied by the Monte Carlo method. The thermodynamic characteristics, spin-spin, and four spin-correlation function have been calculated. From several maxima of the correlation radius of the four spin-correlation function and sharp slopes of the dimer order parameter, a longitudinal component of the total spin square as a function of temperature and magnetic field, the existence of two mass singlet excitation branches with Delta S-z=0 and one triplet with Delta S-z=1 is suggested. Critical temperatures and fields related to singlet filled bands have been estimated. From these results low-temperature (TT-SP) properties of spin-Peierls (SP) compounds CuGeO3 and NaV2O5 have been explained.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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12.

Ferromagnetic interlayer coupling in C60-Co compound/Ni bilayer structure / Y. Matsumoto [et al.] // Chemical Physics Letters. - 2011. - Т. 511, № 1-3. - P. 68-72, DOI 10.1016/j.cplett.2011.05.038 . - ISSN 0009-2614. - ISSN 1873-4448

РИНЦ
Держатели документа:
Advanced Science Research Center,Japan Atomic Energy Agency
Department of Materials Molecular Science,Institute for Molecular Science

Доп.точки доступа:
Matsumoto, Y.; Sakai, S.; Entani, S.; Naramoto, H.; Avramov, P.; Takagi, Y.; Nakagawa, T.; Yokoyama, T.
}
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13.

    First outer-sphere 1,3-diethyl-2-thiobarbituric compounds [M(H2O)6](1,3-diethyl-2-thiobarbiturate)2·2H2O (M = Co2+, Ni2+): Crystal structure, spectroscopic and thermal properties / N. N. Golovnev [et al.] // Chem. Phys. Lett. - 2016. - Vol. 653. - P. 54-59, DOI 10.1016/j.cplett.2016.04.059. - Cited References: 50. - The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University in 2015-2016. V.V. A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of the investigation. X-ray data were obtained with use the analytical equipment of Krasnoyarsk Center of collective use of SB RAS. . - ISSN 0009-2614
   Перевод заглавия: Первые соединения с внешнесферным 1,3-диэтил-2-тиобарбитуратом [M(H2O)6](1,3-диэтил-2-2тиобарбитурат)2·2H2O (M=Co2+, Ni2+): кристаллическая структура, спектроскопия и тепловые свойства

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
Thiobarbituric acid complexes
   Transition-metal-complexes; 2-thiobarbituric acid; hydrogen-bond
   2-thiobarbituric acid
   Hydrogen-bond
   Chemistry
   Transformation
   Diffraction
   Ligand
   Series
   Copper
Кл.слова (ненормированные):
1,3-Diethyl-2-thiobarbituric acid -- Nickel(II) -- Cobalt(II) -- Coordination compound -- X-ray diffraction -- Infrared spectroscopy -- Thermal analysis
Аннотация: Two new d-element compounds, [Co(H2O)6](Detba)2·2H2O (1) and [Ni(H2O)6](Detba)2·2H2O (2) (HDetba - 1,3-diethyl-2-thiobarbituric acid) were synthesized and characterized by single-crystal and powder X-ray diffraction analysis, TG-DSC and FT-IR. Structural analysis revealed that (1) and (2) are discrete structures, in which M2+ ion (M = Co, Ni) is six-coordinated by water molecules and it forms an octahedron. The outer-sphere Detba- ions and H2O molecules participate in O-H?(O/S) intermolecular hydrogen bonds which form the 2D layer. Thermal decomposition includes the stage of dehydration and the following stage of oxidation of Detba- with a release of CO2, SO2, H2O, NH3 and isocyanate gases. © 2016 Elsevier B.V. All rights reserved.

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Держатели документа:
Department of Chemistry, Siberian Federal University, 79 Svobodny Aven., Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, bld. 38, Akademgorodok 50, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, 47 Seryshev Str., Khabarovsk, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, 13 Lavrentiev Aven., Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, 36 Lenin Aven., Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, 2 Pirogov Str., Novosibirsk, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.; Atuchin, V. V.
}
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14.

Formation of Cu6Sn5 intermetallic in Cu/Sn thin films / L. E. Bykova, S. M. Zharkov, V. G. Myagkov [et al.] // Phys. Solid State. - 2022. - Vol. 64, Is. 14. - P. 2414-2418, DOI 10.21883/PSS.2022.14.54350.139. - Cited References: 16. - This research was supported financially by the Russian Foundation for Basic Research (grant No. 19-43-240003). Electron microscopic studies were carried out at the Krasnoyarsk Regional Research Equipment Sharing Center of the Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences and the Electron Microscopy Laboratory of the Research Equipment Sharing Center of the Siberian Federal University, supported under the state assignment of the Ministry of Science and Higher Education of the Russian Federation (scientific topic code FSRZ-2020-0011) . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
thin films -- Cu6Sn5 intermetallic compound -- transmission electron microscopy -- electron diffraction
Аннотация: The study of the formation of the Cu6Sn5 intermetallic compound in Sn(55 nm)/Cu(30 nm) thin bilayer films was carried out directly in the column of a transmission electron microscope (electron diffraction mode) by heating the film sample from room temperature to 300oC and recording the electron diffraction patterns. The thin films formed as a result of a solid state reaction were monophase and consisted of the η-Cu6Sn5 hexagonal phase. The temperature range for the formation of the η-Cu6Sn5 phase was determined. The estimate of the effective interdiffusion coefficient of the reaction suggests that the main mechanism for the formation of the Cu6Sn5 intermetallic is diffusion along the grain boundaries and dislocations.

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Публикация на русском языке Формирование интерметаллида Cu6Sn5 в тонких пленках Cu/Sn [Текст] / Л. Е. Быкова, С. М. Жарков, В. Г. Мягков [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 12. - С. 2205-2209

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Bykova, L. E.; Быкова, Людмила Евгеньевна; Zharkov, S. M.; Жарков, Сергей Михайлович; Myagkov, V. G.; Мягков, Виктор Григорьевич; Balashov, Yu. Yu.; Балашов, Юрий Юрьевич; Patrin, G. S.; Патрин, Геннадий Семёнович
}
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15.

    Giant magnetostriction of CuGeO3 / L. . Gladczuk [et al.] // Czech. J. Phys. - 1996. - Vol. 46. - P. 1969-1970, DOI 10.1007/BF02570976. - Cited References: 10 . - ISSN 0011-4626
Рубрики:
SPIN-PEIERLS TRANSITION
   COMPOUND CUGEO3
   SYSTEM CUGEO3
   STATE
Аннотация: The magnetostriction of CuGcO(3) single crystals has been measured in the temperature range from 5 to 16 K in magnetic fields up to 12 T. Giant values of the magnetostrictive strains along the b-axis is observed near the phase transition from the dimerized phase to the high field magnetic phase. The field induced magnetostriction in the antiferromagnetic phase is considerably smaller than in the dimerized phase.

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Доп.точки доступа:
Gladczuk, L.; Szymczak, R.; Nabialck, A.; Krynetskii, I.; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Vorotynov, A. M.; Воротынов, Александр Михайлович; Szymczak, H.; International Conference on Low Temperature Physics(21 ; 1996 ; Aug. 8-14 ; Prague)
}
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16.

Guillemet-Fritsch S. Thermal expansion study of CaCu3Ti4012 compound in temperature range 150-200 К [Text] / M. V. Gorev, I. N. Flerov, A. V. Kartashev // 12th European Meeting on Ferroelectricity : Abstracts. - 2011. - Ст. P9-1

Доп.точки доступа:
Gorev, M.V.; Flerov, I.N.; Kartashev, A.V.; European Meeting on Ferroelectricity(12 ; 2011 ; 26 June - 1 July ; Bordeaux, France)
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17.

Heat capacity of the PbFe1/2Ta1/2O3 perovskite-like compound / M. V. Gorev [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 521-525, DOI 10.1134/1.1687872. - Cited References: 26 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
   PBFE0.5TA0.5O3
   FERROELECTRICS
   DIFFRACTION
   NIOBATE
   GROWTH
Аннотация: The heat capacity C-p(T) of the complex perovskite PbFe1/2Ta1/2O3 has been studied using adiabatic calorimetry in the temperature range 150-370 K. Three diffuse anomalies in C-p(T) are found to exist at temperatures T-d approximate to 350 K, T-m approximate to 250-300 K, and T-c approximate to 205 K. The anomalous and the lattice contribution to the heat capacity are separated, and the change in the entropy is determined. The results of the study are discussed jointly with the data on the structure and physical properties of the compound. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, CEMES, F-31055 Toulouse, France
INFM, I-090124 Cagliari, Italy
Dipartimento Fis, I-090124 Cagliari, Italy
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CEMES-CNRS, 29 Rue Jeanne Marvig, Toulouse, 31055, France
Inst. Naz. di Fisica della Materia, Dipartimento di Fisica, Monserrato (Cagliari), 090124, Italy

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.; Lehmann, A. G.
}
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18.

    Hydrates [Na2(H2O)x](2-thiobarbiturate)2 (x = 3, 4, 5): crystal structure, spectroscopic and thermal properties / N. N. Golovnev [et al.] // J. Coord. Chem. - 2016. - Vol. 69, Is. 21. - P. 3219-3230, DOI 10.1080/00958972.2016.1228914. - Cited References:33. - This work was supported by the the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University [grant number 3049]. . - ISSN 0095-8972. - ISSN 1029-0389
   Перевод заглавия: Гидраты [Na2(H2O)x](2-thiobarbiturate)2 (x = 3, 4, 5): кристаллическая структура, спектроскопические и термические свойства

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
2-THIOBARBITURIC ACID
   COMPLEXES
   1,3-DIETHYL-2-THIOBARBITURATE
   TRANSFORMATION
   CESIUM
   Na
   Li
Кл.слова (ненормированные):
2-Thiobarbituric acid -- Sodium -- coordination compound -- X-ray diffraction -- infrared spectroscopy -- thermal analysis
Аннотация: The hydrates [Na2(H2O)3(Htba)2] (1) and [Na2(H2O)4(Htba)2] (2), where H2tba is 2-thiobarbituric acid, were obtained under different thermal conditions from aqueous solutions and were structurally characterized. The molecular and supramolecular structures were compared to the known structure of [Na2(H2O)5(Htba)2] (3). In polymeric 1–3, the Htba− ions are linked to Na+ through O and S forming octahedra. The decrease of the number of coordination water molecules led to an increase of the total number of bridge ligands (μ2-H2O, Htba−) and a change of the Htba− coordination. These factors induced higher distortion of the octahedra. It was assumed that hydrates, with a different number of coordinated water molecules, are more probable when the central metal has weaker bonds with O water molecules and with other ligands. The net topologies of 1–3 were compared. Thermal decomposition and IR spectra were analyzed for 1 and 2.

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Держатели документа:
Siberian Fed Univ, Dept Chem, Krasnoyarsk, Russia.
Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia.
Irkutsk Favorsky Inst Chem, Lab Phys Chem, Irkutsk, Russia.
Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk, Russia.
Tomsk State Univ, Funct Elect Lab, Tomsk, Russia.
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk, Russia.

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, Irina V.; Atuchin, V. V.; Sidorenko, Maxim Y.; Ministry of Education and Science of the Russian Federation [3049]
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19.

    Hydrothermal crystallization of a Ln2(OH)4SO4·nH2O layered compound for a wide range of Ln (Ln = La-Dy), thermolysis, and facile transformation into oxysulfate and oxysulfide phosphors / X. Wang [et al.] // RSC Adv. - 2017. - Vol. 7, Is. 22. - P. 13331-13339, DOI 10.1039/c7ra00645d. - Cited References: 54. - This work was partly supported by the National Natural Science Foundation of China (Grants No. 51672039, 51172038, and 51302032), the Fundamental Research Fund for the Central Universities (Grant No. N140204002), the Grants-in-Aid for Scientific Research (KAKENHI No. 26420686), and the Russian Foundation for Basic Research (15-52-53080). Xuejiao Wang acknowledges the financial support received from the China Scholarship Council for her overseas Ph. D. study at the National Institute of Materials Science (Contract No. 201406080035). . - ISSN 2046-2069
   Перевод заглавия: Гидротермальная кристаллизация слоистых соединений Ln2(OH)4SO4·nH2O с широким диапазоном Ln (Ln = La-Dy), термолиз и плавный переход в оксисульфатные и оксисульфидные люминофоры
Кл.слова (ненормированные):
Dysprosium -- Hydrothermal synthesis -- Light emission -- Phase structure -- Phosphors -- Rare earth elements -- Acceleration voltages -- Chemical compositions -- Electron beam irradiation -- Hydrothermal conditions -- Hydrothermal crystallization -- Lanthanide contraction -- Photoluminescence properties -- Structure refinements -- Dysprosium compounds
Аннотация: The synthesis of a layered Ln2(OH)4SO4·nH2O material (Ln-241) with a smaller lanthanide ion (Dy3+) was successfully achieved through the optimization of the hydrothermal conditions, and the effect of lanthanide contraction on the chemical composition, phase structure, and crystallite/particle morphology of the products was investigated and discussed. Structure refinement showed that the lattice parameters (a, b, and c), cell volume, and axis angle across the series (Ln = La-Dy) monotonously decrease as the size of Ln3+ decreases. Comparative TG/DTA analysis in air indicated that the dehydroxylation temperature of Ln-241 tends to increase, whereas the dehydration and desulfurization temperatures decrease as the size of Ln3+ decreases, thus narrowing the stable temperature range for Ln2O2SO4. Taking advantage of the fact that Ln-241 has exactly the same Ln/S molar ratio as Ln2O2SO4 and Ln2O2S, the latter two groups of important compounds (excluding Ce) were facilely transformed from the former via the removal of water by calcination. The photoluminescence properties of Eu3+ and Tb3+, in terms of excitation, emission, fluorescence decay, quantum yield, and emission color, were investigated and compared for the two hosts Gd2O2S and Gd2O2SO4, and the (Gd0.99Tb0.01)2O2S phosphor was shown to be stable under electron beam irradiation in the studied range and exhibited an increasingly higher emission brightness as the acceleration voltage (up to 7 kV) or beam current (up to 50 μA) increased.

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Держатели документа:
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, Liaoning, China
Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, China
Research Centre for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
College of New Energy, Bohai University, Jinzhou, Liaoning, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, China
World Premier International Centre for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japan

Доп.точки доступа:
Wang, X.; Li, J. -G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, W.; Zhu, Q.; Tanaka, H.; Suzuta, K.; Kim, B. -N.; Sakka, Y.
}
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20.

    Influence of alkyl substituents in 1,3-diethyl-2-thiobarbituric acid on the coordination environment in M(H2O)2(1,3-diethyl-2-thiobarbiturate)2 M = Ca2+, Sr2+ / N. N. Golovnev [et al.] // J. Coord. Chem. - 2016. - Vol. 69, Is. 6. - P. 957-965, DOI 10.1080/00958972.2016.1149168. - Cited References: 42. - The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering of the Siberian Federal University in 2015-2016. V.V.A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of the investigation. . - ISSN 0095-8972
   Перевод заглавия: Влияние алкильных заместителей в 1,3-диэтил-2-2тиобарбитуровой кислоты на координационное окружение в M(H2O)2(1,3-диэтил-2-тиобарбутурат)2 M = Ca2+, Sr2+

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
CRYSTAL-STRUCTURE
   2-THIOBARBITURIC ACID
   STRUCTURAL-CHARACTERIZATION
   THIOBARBITURIC ACID
   THERMAL-PROPERTIES
   HYDROGEN-BOND
   COMPLEXES
   DIFFRACTION
   NETWORKS
   POLYMERS
Кл.слова (ненормированные):
1,3-Diethyl-2-thiobarbituric acid -- alkaline earth metals -- coordination compound -- X-ray diffraction -- thermal analysis
Аннотация: Two new isostructural complexes, [Ca(H2O)2(μ2-Detba-O,O′)2]n (1) and [Sr(H2O)2(μ2-Detba-O,O′)2]n (2) (HDetba = 1,3-diethyl-2-thiobarbituric acid), were synthesized and characterized by single-crystal and powder X-ray diffraction analysis, TG-DSC, FT-IR, and emission spectroscopy. The single-crystal X-ray diffraction data revealed that 1 and 2 are polymeric where M2+ (M = Ca, Sr) is a six-coordinate octahedral binding four Detba− ions and two water molecules. The octahedra are linked through bridging Detba− ions forming a 2-D layer. Two intermolecular hydrogen bonds O–H…S in the crystal form a 3-D net. The comparison of M(Detba)2 and M(Htba)2 (H2tba = 2-thiobarbituric acid) structures showed that the coordination number of metals in M(Detba)2 does not exceed six and there are no π–π interactions, unlike compounds with Htba−; Detba− ions are only bridges in HDetba coordination compounds. Thermal decomposition of 1 and 2 includes dehydration, which mainly ends at 200 °C, and organic ligand oxidation at 300–350 °C with a release of CO2, SO2, H2O, NH3, and isocyanate. Upon excitation at 220 nm, 1 and 2 exhibit an intense emission maximum at 557 nm.

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Держатели документа:
Department of Chemistry, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Головнёв, Николай Николаевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Samoilo, A. S.; Atuchin, V. V.
}
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