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  1. No Access

    Article

    Synthesis, clarifying properties and refining structures of single-crystal magnesium borohydride di- and triammine complexes

    The magnesium borohydride complexes with ammonia, Mg(BH4)2•2NH3 (MA-2) and Mg(BH4)2•3NH3 (MA-3), were obtained in a single crystal form and their structures were determined by the X-ray diffraction analysis. Acco...

    M. V. Solovev, V. P. Vasiliev, G. V. Shilov, O. V. Kravchenko… in Russian Chemical Bulletin (2024)

  2. No Access

    Article

    Saturation Vapor Pressure of Water over Sodium Borohydride Dihydrate

    The relative humidity and saturated water vapor pressure resulted from the reversible equilibrium dissociation of crystalline NaBH4·2H2O in the temperature range 0–36°C were determined. Based on the data obtained...

    A. V. Shikhovtsev, O. V. Kravchenko… in Russian Journal of Applied Chemistry (2023)

  3. No Access

    Article

    Quantum-Chemical Simulation of Molecular Hydrogen Abstraction from Magnesium Borohydride Triammoniate

    Successive abstraction of H2 from the Mg(BH4)2⋅nNН3 (n = 2, 3, 4) and (Mg(BH4)2⋅3NН3)2 complexes has been modeled within the framework of the cluster approach with the use of the 6-31G* basis set and hybrid densi...

    A. S. Zyubin, T. S. Zyubina, O. V. Kravchenko… in Russian Journal of Inorganic Chemistry (2022)

  4. No Access

    Article

    Protein-Sorption and the Hemostatic Properties of Composite Materials Based on Polyurethane Foam Filled with Silicon and Aluminum Oxides

    An effective hemostatic composite material was obtained due to the combination of water-absorption, protein-sorption, and hemostatic properties of highly dispersed oxides of SiO2 and Al2O3 with the cellular struc...

    A. A. Kravchenko, I. I. Gerashchenko… in Theoretical and Experimental Chemistry (2020)

  5. No Access

    Article

    Synthesis, Structure, and Properties of Titanium Diboride Nanoparticles

    The products of reaction between TiCl4 and NaBH4 in NaCl/KCl or KBr ionic melts at 973 and 1023 K under an argon pressure of 5 MPa have been characterized by various physicochemical analysis techniques. The resul...

    A. A. Vinokurov, D. Yu. Kovalev, I. I. Korobov, O. V. Kravchenko… in Inorganic Materials (2020)

  6. No Access

    Article

    Norbornene Addition Polymerization with Catalysts Based on Transition Metal Compounds: 2008–2018

    This review summarizes the data on the addition polymerization of norbornene catalyzed by various transition metal complexes published over the period of 2008–2018. The interest in the addition polynorbornenes...

    D. S. Suslov, M. V. Bykov, O. V. Kravchenko in Polymer Science, Series C (2019)

  7. No Access

    Article

    Synthesis of Sodium Borohydride Dihydrate and Specific Features of Its Thermolysis

    Process of thermolysis of sodium borohydride dihydrate samples produced from solution and via a vapor was considered. A study of an acetonitrile solution made by the method of nuclear magnetic resonance demons...

    I. V. Arkhangel’sky, O. V. Kravchenko… in Russian Journal of Applied Chemistry (2019)

  8. No Access

    Article

    Thermoanalytical and NMR investigation of NaBH4 × 2H2O thermolysis process

    The article describes the thermolysis process of sodium borohydride dihydrate in thermoanalytical experiments. The reaction was carried out without solid catalyst and with catalyst as cobalt boride Co2B. It has b...

    I. V. Arkhangelskii, V. P. Tarasov… in Journal of Thermal Analysis and Calorimetry (2018)

  9. No Access

    Article

    Thermoanalytical and NMR investigation of NaBH4·2H2O thermolysis process

    The article describes the thermolysis process of sodium borohydride dihydrate in thermoanalytical experiments. The reaction was carried out without solid catalyst and with catalyst as cobalt boride Co2B. It has b...

    I. V. Arkhangelskii, V. P. Tarasov… in Journal of Thermal Analysis and Calorimetry (2018)

  10. No Access

    Article

    Dihydrogen Elimination from Hydrated Magnesium Borohydride: Quantum-Chemical Modeling

    The successive elimination of H2 from Mg(BH4)2 · nH2O (n = 1, 4, 6), (Mg(BH4)2)2 · 8H2O, and (Mg(BH4)2)4 · 4H2O complexes has been modeled in the framework of the cluster approach with the use of the 6-31G* basis...

    A. S. Zyubin, T. S. Zyubina, O. V. Kravchenko… in Russian Journal of Inorganic Chemistry (2018)

  11. No Access

    Article

    Effect of sodium borohydride dihydrate aggregation on the barrier to elimination of hydrogen molecule: Quantum-chemical modeling

    The successive elimination of Н2 from NaBH4 ∙ 2Н2O, (NaBH4 ∙ 2Н2O)2, (NaBH4 ∙ 2Н2O)4, and (NaBH4 ∙ 2Н2O)4 · Н2O complexes has been modeled in the framework of the cluster approach with the use of the 6-31G* basis...

    A. S. Zyubin, T. S. Zyubina, O. V. Kravchenko… in Russian Journal of Inorganic Chemistry (2017)

  12. No Access

    Article

    Quantum-chemical modeling of dehydrogenation of a sodium borohydride molecule in water

    The successive elimination of Н2 from a NaBH4 molecule surrounded by a few (up to eight) water molecules has been modeled in the framework of the cluster approach with the use of the 6-31G* basis set and hybrid d...

    A. S. Zyubin, T. S. Zyubina, O. V. Kravchenko… in Russian Journal of Inorganic Chemistry (2016)

  13. No Access

    Article

    Activation of metallic aluminum by tin and gallium chlorides in oxidation with water

    We have studied the effect of gallium chloride and tin chloride solutions on the water oxidation of aluminum at SnCl2 concentrations of 0.68 and 6.32 wt %, GaCl3 concentrations of 0.56 and 2.67 wt %, and MCl ...

    A. G. Burlakova, S. P. Shilkin, O. V. Kravchenko, N. N. Dremova… in Inorganic Materials (2012)

  14. No Access

    Article

    Synthesis and investigation of superconducting properties of heterosubstituted magnesium diborides

    The properties of magnesium diborides with the composition Mg1 − x M x B2, where M = Al, Ga, In, and Tl, and Mg (B1 − x ...

    L. G. Sevastyanov, P. E. Kazin, O. V. Kravchenko, O. K. Gulish… in Inorganic Materials (2009)

  15. No Access

    Article

    Oxidation of activated aluminum with water as a method for hydrogen generation

    The activation of aluminum with low-melting gallium-based alloys makes it possible to obtain a material easily oxidizable by water at room temperature to release ~1.2 L of pure hydrogen per 1 g of metal. The k...

    A. V. Parmuzina, O. V. Kravchenko, B. M. Bulychev… in Russian Chemical Bulletin (2009)

  16. No Access

    Article

    Isocationic substitution of copper(II) complexes in anisotropic materials based on benzenetricarboxylate

    A phase transfer isocationic substitution of lattice constituent macrocyclic complexes by copper(II) aqua complexes occurs upon the interaction of crystalline mono-and bis(macrocyclic) copper carboxylate compl...

    O. V. Kravchenko, L. V. Tsymbal, Ya. D. Lampeka in Theoretical and Experimental Chemistry (2007)

  17. No Access

    Article

    Binary and ternary compounds in the Mg-Sb-B and Mg-Bi-B systems as catalysts for the synthesis of cubic BN

    We have studied the phase relations in the Mg-Pn and Mg-B-Pn (Pn = Sb, Bi) systems, synthesized the magnesium pnictides Mg3Sb2 and Mg3Bi2 and the new magnesium boropnictides Mg3Pn2(B2), and determined their struc...

    L. G. Sevast’yanova, O. V. Kravchenko, O. K. Gulish, V. A. Stupnikov… in Inorganic Materials (2006)

  18. No Access

    Article

    Hypothesis of Hemoprotein Sensor Confirmed by Ab initio Quantum-Chemical Method

    The nature of the chemical bond of complexes of iron and cobalt porphyrinates with ligands is studied by the quantum-chemical method in the Hartree–Fock self-consistent field approximation using the 3-21G basi...

    T. A. Romanova, O. V. Kravchenko… in Russian Journal of Coordination Chemistry (2004)

  19. No Access

    Article

    On the existence of solid solutions based on magnesium diboride

    Dense samples of pure magnesium boride and of the compositions Mg(1–x)A x B2 (A = Na, K, Ca, Sr, Ba, Sn, Ti; 0.05 < x < 0.15) were prepared by sintering and using high temperatur...

    L. G. Sevast'yanova, P. E. Kaz, O. V. Kravchenko… in Russian Chemical Bulletin (2003)

  20. No Access

    Article

    Crystalline carbon nitrides: thin films and bulk samples

    A new method was developed for the preparation of bulk samples of crystalline carbon nitride on exposure of an amorphous nitrogen- and carbon-containing material to high temperature and ultrahigh pressure in t...

    K. P. Burdina, N. B. Zorov, J. I. Kim, O. V. Kravchenko… in Russian Chemical Bulletin (2002)

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