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    2-Thiobarbiturate complexes of Ca(II): synthesis, crystal structure and thermal properties / N. N. Golovnev [et al.] // 3 Int. Conf. on the Advancement of Mater. and Nanotechn. (ICAMN 2013) : Programme and abstracts book. - 2013. - P. 157
   Перевод заглавия: 2-тиобарбитуровые комплексы Ca(II): синтез, кристаллическая структура и термические свойства
Кл.слова (ненормированные):
calcium -- 2-thiobarbituric acid -- crystal structure -- thermal decomposition -- IR spectroscopy

Доп.точки доступа:
Golovnev, N. N.; Головнёв, Николай Николаевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Vereschagin, S. N.; Верещагин, С. Н.; Atuchin, V. V.; Атучин, Виктор Валерьевич; International Conference on the Advancement of Materials and Nanotechnology (3 ; 2013 ; Nov. ; 19-22 ; Penang, Malaysia)
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    Calcium and strontium thiobarbiturates with discrete and polymeric structures / N. N. Golovnev [et al.] // J. Coordinat. Chem. - 2013. - Vol. 66. No. 23. - P. 4119–4130, DOI 10.1080/00958972.2013.860450 . - ISSN 4119-4130
   Перевод заглавия: Кальциевый и стронциевый тиобарбитураты с дискретной и полимерной структурами
Кл.слова (ненормированные):
Calcium -- 2-Thiobarbituric acid IR -- Crystal structure -- Thermal decomposition -- Strontium -- IR spectroscopy
Аннотация: Three new alkaline earth metal complexes, [Ca2(H2O)8(μ2-HTBA-O,O′)2(HTBA-O)2] (1), [Ca(H2O)5(HTBA-O)2]·2H2O (2), and [Sr(H2O)4(μ2-HTBA-O,S)2]n (3) (H2TBA = 2-thiobarbituric acid, C4H4N2O2S), were synthesized and characterized by FT-IR spectroscopy, TG-DSC, and single-crystal and powder X-ray diffraction analysis. The single-crystal X-ray diffraction data revealed that 1 and 2 are discrete structures, whereas 3 is a polymer. In 1 and 2, Ca2+ is seven-coordinate and forms a monocapped trigonal prism. In 1, the prisms are pairwise connected with the assistance of two [μ2-HTBA-O,O′]− ligands. In 3, Sr2+ is coordinated by four monodentate HTBA− via S or O donors and four waters, with the formation of a distorted square antiprism. The antiprisms are connected by μ2-O,S bridging HTBA−. Hydrogen bonding involving coordinated water and π–π interactions plays an important role in construction of the supramolecular 3-D structures in 1–3. Infrared spectroscopic data supported the structural data. The thermal stability of 1–3 decreases in the order 1 > 2 > 3. Dehydration of 1–3 was a multi-step process, followed by exothermic oxidative degradation of the 2-thiobarbiturate moiety between 290 and 800 °C.

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Держатели документа:
Siberian Fed Univ, Dept Chem, Krasnoyarsk, Russia
LV Kirenskii Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia
Inst Chem & Chem Technol, Lab Catalyt Convers Small Mol, Krasnoyarsk, Russia
Russian Acad Sci, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia;

Доп.точки доступа:
Golovnev, N. N.; Головнёв, Николай Николаевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Vereshchagin, S. N.; Atuchin, V. V.
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Crystal structure and properties of polymeric hexaaqua-hexakis-(2-thiobarbiturato)-disamarium(III) / N. N. Golovnev [et al.] // J. Struct. Chem. - 2017. - Vol. 58, Is. 3. - P. 539-543, DOI 10.1134/S0022476617030155. - Cited References: 17 . - ISSN 0022-4766
Кл.слова (ненормированные):
structure -- synthesis -- complex -- 2-thiobarbituric acid -- samarium(III) -- thermal decomposition -- IR spectrum
Аннотация: The structure (CIF file CCDC No. 1401886) of the hexaaqua-hexakis(2-thiobarbiturato)-disamarium [Sm2(H2O)6(HTBA)6]n polymeric complex (I), where H2ТВА is 2-thiobarbituric acid, is determined; its thermal decomposition and IR spectrum are studied. The crystals of I are monoclinic: a = 14.072(1) Å, b = 10.0842(6) Å, c = 15.323(1) Å, β = 110.408(2)°, V = 2037.9(2) Å3, space group P2/n, Z = 2. All three independent thiobarbiturate anions HTBA– coordinate to Sm3+ through oxygen atoms. To one of independent Sm3+ ions six (two terminal and four bridging) HTBA– ions and two water molecules are coordinated; the second is bonded with four bridging HTBA– and four water molecules, forming square antiprisms. The bridging HТВА–anions arrange antiprisms in layers. The structure is stabilized by hydrogen bonds and a π–π interaction between the HТВА– ions. The topology of the polymer network of I is analyzed.

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Публикация на русском языке Кристаллическая структура и свойства полимерного гексааква-гексакис(2-тиобарбитурато)-дисамария(III) [Текст] / Н. Н. Головнев [и др.] // Журн. структ. химии. - 2017. - Т. 58 № 3. - С. 567-571

Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Far Eastern State Transport University, Khabarovsk, Russian Federation
Favorsky Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Krasnoyarsk State Agrarian University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, I. V.; Vereshchagin, S. N.; Golovneva, I. I.
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Decomposition in Ni-Co-Mn-In functional Hensler alloys and its effect on shell-ferromagnetic and magnetocaloric effects / M. Sasmaz, F. Dreist, I. Iglesias [et al.] // Phys. Rev. B. - 2020. - Vol. 102, Is. 6. - Ст. 064401, DOI 10.1103/PhysRevB.102.064401. - Cited References: 38. - This work was supported by Deutsche Forschungsgemeinschaft (Project No. 405553726-CRC/TRR 270). The authors acknowledge support from the Turkish Scientific and Technological Research Council (Project No. 1059B191701241), the Deutsche Akademisches Austausch Dienst, and the Government of the Russian Federation (Grant No. 075-15-2019-1886). . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics,
Рубрики:
FIELD-INDUCED STRAIN
MAGNETIC-FIELD
MARTENSITIC-TRANSFORMATION
Аннотация: Ni-Co-Mn-In Heusler-based compounds are interesting for their magnetocaloric properties and have been widely investigated for this purpose. For Co compositions more than 5 at% in (Ni100-xCox)50Mn25+yIn25-y the material is no longer single phase, and for y 25, shell-ferromagnetic precipitation occurs. Our study is twofold: First we study here the shell-ferromagnetic properties of these systems and show that their ferromagnetic exchange can be strengthened by introducing Co into the precipitate. Second, we further show that both the multiphase character and shell-ferromagnetic precipitation have strong implications on the magnetocaloric properties.

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Держатели документа:
Adiyaman Univ, Golbasi Vocat Sch, Dept Elect & Energy, TR-02500 Adiyaman, Turkey.
Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany.
Univ Duisburg Essen, CENIDE, D-47048 Duisburg, Germany.
Mugla Univ, Dept Met & Mat Engn, TR-48000 Mugla, Turkey.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Sasmaz, M.; Dreist, F.; Iglesias, I.; Cakir, A.; Farle, M.; Фарле, Михаель; Acet, M.; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [405553726-CRC/TRR 270]; Turkish Scientific and Technological Research CouncilTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [1059B191701241]; Deutsche Akademisches Austausch Dienst; Government of the Russian Federation [075-15-2019-1886]
}
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Effect of surfactants on the structure, phase composition, and magnetic properties of FexSy nanoparticles synthesized by thermal decomposition / R. D. Ivantsov, C.-R. Lin, Y.-Z. Chen [et al.] // Nanobiotechnol. Rep. - 2022. - Vol. 17, Is. 3. - P. 336-344, DOI 10.1134/S2635167622030089. - Cited References: 27. - This study was supported by the Russian Foundation for Basic Research with Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project no. 19-42-240005: “Features of the Electronic Structure, Magnetic Properties, and Optical Excitations in Nanocrystals of Multifunctional Magnetic Chalcogenides Fe3S4 and FeSe” and the Russian Foundation for Basic Research and the Ministry of Science and Technology of Taiwan, joint projects nos. 19-52-52002 and 109-2112-M-153-003 and 108-2923-M-153-001-MY3. - The electron-microscopy study was carried out at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research code FSRZ-2020-0011). The magnetic measurements were carried out on a vibrating sample magnetometer at the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 2635-1676
Кл.слова (ненормированные):
Agglomeration -- Crystal impurities -- Fourier transform infrared spectroscopy -- High resolution transmission electron microscopy -- Magnetic properties -- Magnetite -- Magnetization -- Nanomagnetics -- Sulfur compounds -- Synthesis (chemical) -- Thermogravimetric analysis -- Thermolysis -- Electron diffraction analysis -- Greigites -- Hexadecylamine -- Inverse spinel structures -- Iron sulfide -- Isostructural -- Octadecyl amine -- Organic shells -- Structures phase -- Synthesised -- Surface active agents
Аннотация: The effect of surfactants on the structure, morphology, and magnetic properties of FexSy iron-sulfide nanoparticles synthesized by thermal decomposition is studied. Oleylamine, hexadecylamine, and octadecylamine are used as surfactants. It is established by X-ray and electron-diffraction analysis combined with Mossbauer spectroscopy that, in samples 1 and 2 prepared using oleylamine and hexadecylamine, respectively, the Fe3S4 greigite phase dominates, with an inverse spinel structure isostructural to the iron oxide Fe3O4 magnetite with minor Fe9S11 impurities. Deviations in the distribution of iron cations over the tetrahedral and octahedral sites relative to the bulk greigite crystals are observed. The nanoparticles synthesized using octadecylamine (sample 3) are found to be multiphase with a greigite fraction of ~20%. In all three cases, as showed the results of transmission electron microscopy and Fourier transform infrared spectroscopy together with thermogravimetry analysis, the magnetic nanoparticles have an organic shell chemically bonded to their magnetic core, which prevents the agglomeration of the particles. This shell is much more massive in samples 2 and 3. The magnetization values for samples 1 and 2 are similar to those of greigite nanoparticles reported in publications, while the magnetization of sample 3 is several times lower, in accordance with the greigite fraction in it. The combination of fairly high magnetization with a massive organic shell allows one to consider hexadecylamine to be a promising surfactant for the synthesis of iron-sulfide nanoparticles protected from external impact and agglomeration.

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Публикация на русском языке Влияние ПАВ на структуру, фазовый состав и магнитные свойства наночастиц FexSy, полученных методом термического разложения [Текст] / Р. Д. Иванцов, Ч. Р. Лин, Ю. Ж. Чэнь [и др.] // Рос. нанотехнол. - 2022. - Т. 17 № 3. - С. 358-367

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Department of Applied Physics, National Pingtung University, Pingtung City, 90003, Taiwan
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Lin, C. -R.; Chen, Y. -Z.; Ivanova, O. S.; Иванова, Оксана Станиславовна; Altunin, R. R.; Knyazev, Yu. V.; Князев, Юрий Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Shestakov, N. P.; Шестаков, Николай Петрович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
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    Electron spin resonance in Cu1−xFexCr2Se4 nanoparticles synthesized with the thermal decomposition method / I. S. Edelman [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 436. - P. 21-30, DOI 10.1016/j.jmmm.2017.04.006. - Cited References: 34. - The paper was partially supported by the President of Russia (Grant #NSh-7559.2016.2). We also thank the Ministry of Science and Technology of Taiwan, Taiwan, and the Siberian Branch of RAS, Russian Federation (MOST 102-2112-M-153-002-MY3) for the financial support. . - ISSN 0304-8853
   Перевод заглавия: Электронный парамагнитный резонанс в наночастицах Cu1-xFexCr2Se4, синтезированных методом термического разложения
Кл.слова (ненормированные):
Anisotropy -- Association reactions -- Chromium compounds -- Decomposition -- Electrospinning -- Inorganic compounds -- Magnetic moments -- Magnetocrystalline anisotropy -- Nanoparticles -- Plates (structural components) -- Resonance -- Spin dynamics -- Synthesis (chemical) -- Temperature distribution -- Thermolysis -- Inter-particle interaction -- Nanoparticle (NPs) -- Resonance spectrum -- Single-crystalline -- Temperature behavior -- Temperature decrease -- Temperature dependence -- Thermal decomposition methods -- Electron spin resonance spectroscopy
Аннотация: IIn this paper, we present a study of the electron spin resonance (ESR) of nanoparticles (NPs) of Cu1−xFexCr2Se4 chalcogenides with x = 0, 0.2, and 0.4. NPs were synthesized via the thermal decomposition of metal chloride salts and selenium powder in a high-temperature organic solvent. According to the XRD and HRTEM data, the NPs were single crystalline nearly hexagonal plates with the structure close to CuCr2Se4 (Fd-3m, a = 10.337 Å). For x = 0 and 0.2, the NPs tend to form long stacks consisting of the plates “face to face” attached to each other due to the magnetostatic interparticle interaction. Only separate NPs were observed in the case of x = 0.4. Peculiarities were revealed in the ESR temperature behavior for the NPs with x = 0 and 0.2 consistent with the features in the temperature dependences of the NPs magnetization. The non-monotonous dependence of the resonance field Hres on the temperature with a kink near 130 K and the energy gap in the resonance spectrum depending on the type of nanoparticle compacting are the distinct peculiarities. One of the main factors is discussed in order to explain the peculiarities: the coexistence of two types of anisotropy in the Cu1−xFexCr2Se4 NPs, in-plain shape anisotropy and magnetocrystalline anisotropy with four easy axes, which increases strongly with the temperature decrease.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Pingtung University, Pingtung City, Pingtung County, Taiwan

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Zharkov, S. M.; Жарков, Сергей Михайлович; Pankrats, A. I.; Панкрац, Анатолий Иванович; Vorotynov, A. M.; Воротынов, Александр Михайлович; Tugarinov, V. I.; Тугаринов, Василий Иванович; Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Petrov, D. A.; Петров, Дмитрий Анатольевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Lin, C. -R.; Chen, C. -C.; Tseng, Y. -T.; Hsu, H. -S.
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    Exploration of the structural, spectroscopic and thermal properties of double sulfate monohydrate NaSm(SO4)2·H2O and its thermal decomposition product NaSm(SO4)2 / Y. G. Denisenko, A. E. Sedykh, S. A. Basova [et al.] // Adv. Powder Technol. - 2021. - Vol. 32, Is. 11. - P. 3943-3953, DOI 10.1016/j.apt.2021.08.009. - Cited References: 81. - This work was partly supported by the Russian Science Foundation (21-19-00046) and Russian Foundation for Basic Research (Grant 19-33-90258\19). The use of the equipment of Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged . - ISSN 0921-8831
   Перевод заглавия: Исследование структурных, спектроскопических и термических свойств двойного сульфатного моногидрата NaSm(SO4)2·H2O и продукта его термического разложения NaSm(SO4)2
Кл.слова (ненормированные):
Sulfate -- Thermal decomposition -- Crystal structure -- Raman -- Photoluminescence
Аннотация: Samarium-sodium double sulfate crystalline hydrate NaSm(SO4)2·H2O was obtained by the crystallization from an aqueous solution containing equimolar amounts of ions. The anhydrous salt of NaSm(SO4)2 was formed by a thermally induced release of the equivalent of water from NaSm(SO4)2·H2O. The kinetic parameters of thermal decomposition were determined (Ea = 102 kJ/mol, A = 9·106). The crystal structures of both compounds were refined from the X-ray powder diffraction data. Sulfate hydrate NaSm(SO4)2·H2O crystallizes in the trigonal symmetry, space group P3121 (a = 6.91820(3) and c = 12.8100(1) Å, V = 530.963(7) Å3). The anhydrous salt crystallizes in the triclinic symmetry, space group P-1 (a = 6.8816(2), b = 6.2968(2) and c = 7.0607(2) Å, α = 96.035(1), β = 99.191(1) and γ = 90.986(1)°, V = 300.17(1) Å3). The vibrational properties of compounds are mainly determined by the sulfate group deformations. The luminescence spectra of both sulfates are similar and are governed by the transitions of samarium ions 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2 and 11/2). The anhydrous sulfate is stable up to 1100 K and undergoes an almost isotropic expansion when heated. After 1100 K, the compound decomposes into Sm2(SO4)3 and Na2SO4.

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Держатели документа:
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far-Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Photonics and Laser Technology, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Research Department, Northern Trans-Ural State Agricultural University, Tyumen, 625003, Russian Federation
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation
Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, Giessen, 35392, Germany

Доп.точки доступа:
Denisenko, Y. G.; Sedykh, A. E.; Basova, S. A.; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Khritokhin, N. A.; Sal'nikova, E. I.; Andreev, O. V.; Muller-Buschbaum, K.
}
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Golovnev, N. N.
Structure and Thermal Decomposition of Nd(III), Gd(III) and Tb(III) 2-Thiobarbiturates / N. N. Golovnev, M. S. Molokeev, I. V. Sterkhova // Russ. J. Inorg. Chem. - 2019. - Vol. 64, Is. 9. - P. 1146-1151, DOI 10.1134/S0036023619090134. - Cited References: 21. - The work was performed as part of the State Assignment of the Ministry of Education and Science of the Russian Federation to the Siberian Federal University in 2017-2019. (4.7666.2017/BCh). The powder X-ray diffraction studies were performed using the equipment at the Baikal and Krasnoyarsk Centers for Collective Use of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 0036-0236. - ISSN 1531-8613

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
CRYSTAL-STRUCTURE
TRANSFORMATION
Кл.слова (ненормированные):
lanthanide(III) 2-thiobarbiturates -- structure -- thermal stability
Аннотация: Complexes [Ln2(H2O)6(μ2-Htba−O,O')4(Htba−O)2]n (Ln = Tb (I), Gd (II), Nd (III); and H2tba is thiobarbituric acid) have been synthesized. According to single-crystal X-ray diffraction, monoclinic crystals of I–III are isostructural. They contain three independent Htba– ions (one terminal and two bridging) and two independent Ln3+ ions. Six Htba– ligands (two terminal and four O,O'-bridging) and two water molecules are coordinated to one Ln3+ ion, and four O,O'-bridging Htba– ions and four water molecules are coordinated to the other Ln3+ ion to form square antiprisms. The antiprisms are bound by Htba– bridging ions into layers. Numerous hydrogen bonds and π–π interactions stabilize the structures of the compounds. Thermal decomposition of complexes I and II performed in air results in mixtures of oxides and oxysulfates, whereas complex III forms Nd2O2SO4.

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Публикация на русском языке Головнев Н. Н. Структура и термическое разложение 2-тиобарбитуратов Nd(III), Gd(III) и Tb(III) [Текст] / Н. Н. Головнев, М. С. Молокеев, И. В. Стерхова // Журн. неорг. химии. - 2019. - Т. 64 № 9. - С. 965-970

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Khabarovsk 680021, Russia.
Russian Acad Sci, Favorsky Inst Chem, Siberian Branch, Irkutsk 664033, Russia.

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Sterkhova, I., V; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [4.7666.2017/BCh]
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Golovnev, N. N.
Structure of potassium and cesium barbiturates / N. N. Golovnev, M. S. Molokeev, M. K. Lesnikov // Russ. J. Inorg. Chem. - 2018. - Vol. 63, Is. 10. - P. 1315-1321, DOI 10.1134/S0036023618100078. - Cited References: 25. - This work was performed within the state task from the Ministry of Education and Science to the Siberian Federal University in 2017-2019 (4.7666.2017/BCh). . - ISSN 0036-0236. - ISSN 1531-8613

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
CRYSTAL-STRUCTURE
THERMAL-PROPERTIES
1,3-DIETHYL-2-THIOBARBITURATE
Кл.слова (ненормированные):
potassium and cesium barbiturates -- synthesis -- structure -- thermal decomposition
Аннотация: The structures of catena-[K(μ6-Hba−O,O,O,O′,O′,O″)] (I) and catena-[Cs(μ6-Hba–O,O,O′,O′,O″,O″)] (II), where Н2ba is barbituric acid C4H4N2O3, were characterized by powder X-ray diffraction. Crystallographic data: a = 14.1603 (4) Å, b = 3.68977 (9) Å, c = 10.9508 (3) Å, β = 82.226 (1)°, V = 566.90 (3) Å3, space group P21/n, Z = 4 for I; a = 14.652 (1) Å, b = 11.7275 (7) Å, c = 3.8098 (3) Å, β = 79.140 (6)°, V = 642.90 (8) Å3, space group C2/m, Z = 4 for II. The structural topologies of alkali metal complexes with barbituric acid and some its derivatives were compared. The thermal stability of complexes I and II in an air atmosphere was studied.

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Публикация на русском языке Головнев Н. Н. Структура барбитуратов калия и цезия [Текст] / Н. Н. Головнев, М. С. Молокеев, М. К. Лесников // Журн. неорг. химии. - 2018. - Т. 63 № 10. - С. 1299–1305

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Khabarovsk 680021, Russia.

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.; Ministry of Education and Science [4.7666.2017/BCh]
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10.

Hydrates of lanthanide(III) 2-thiobarbiturates: synthesis, structure, and thermal decomposition / N. N. Golovnev, M. S. Molokeev, M. K. Lesnikov, A. S. Samoilo // Russ. J. Inorg. Chem. - 2020. - Vol. 65, Is. 7. - P. 999-1005, DOI 10.1134/S0036023620070098. - Cited References: 22. - This study was financially supported by the Russian Foundation for Basic Research within scientific project no. 19-52-80003 . - ISSN 0036-0236
Кл.слова (ненормированные):
lanthanides(III) -- thiobarbiturates -- hydrates -- structure -- stability
Аннотация: The hydrates Ln(Htba)3 ∙ 3H2O (Ln = Yb (I), Er (II), Ho (III); Н2tba = 2-thiobarbituric acid), Ln(Htba)3 ∙ 2H2O and Ln(Htba)3 ∙ 8H2O were crystallized from aqueous solutions. According to single-crystal X-ray diffraction analysis data, the structure of monoclinic crystals of isostructural complexes I–III was [Ln2(H2O)6(μ2-Htba-О,O')4(Htba-О)2]n. The formation of isostructural Ln(Htba) ∙ 2H2O (Ln = La, Ce, Eu, Yb, Lu), Ln(Htba)3 ∙ 8H2O (Ln = Eu, Tb, Ho, Yb) and Y(Htba)3 ∙ nH2O (n = 2, 8) was confirmed by the comparison of X-ray diffraction patterns, and their composition was determined by elemental and thermal analyses. The stability of crystal hydrates under heating in an air atmosphere and in contact with their saturated solutions was studied.

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Публикация на русском языке Гидраты 2-тиобарбитуратов лантаноидов(III): синтез, структура и термическое разложение [Текст] / Н. Н. Головнев, М. С. Молокеев, М. К. Лесников, А. С. Самойло // Журн. неорг. химии. - 2020. - Т. 65 № 7. - С. 915-921

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirenskii Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,” Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lesnikov, M. K.; Samoilo, A. S.
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