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   V 92

    Vorokh, A. S.
    A Cd(OH)2/CdS Heteronanostructure of the Core–Shell Type / A. S. Vorokh, N. S. Kozhevnikova // Doklady Physical Chemistry. - 2008. - vol. 419, № 1. - P.41-46 : il. - Bibliogr. : p. 46 (15 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Cd(OH) -- CdS -- СУЛЬФИД КАДМИЯ -- ГЕТЕРОНАНОСТРУКТУРЫ

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   A 10


    A study of cadmium sulfide nanocrystalline films by grazing incidence X-ray diffraction [Text] / N. S. Kozhevnikova, A. A. Rempel, F. Hergert, A. Magerl // Russian Journal of Physical Chemistry A. - 2007. - Vol. 81, № 5. - P768-772. - Библиогр. : с. 772 (18 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СУЛЬФИД КАДМИЯ -- НАНОКРИСТАЛЛИЧЕСКИЕ ПЛЕНКИ -- РЕНТГЕНОВСКОЕ ИЗЛУЧЕНИЕ
Аннотация: Thin cadmium sulfide films were prepared on a monocrystalline crystal silicon substrate by chemical deposition from aqueous solutions. Grazing incidence X-ray diffraction revealed that the cadmium sulfide films are comprised of nanocrystal particles, with 80% of the particles having a size of 5±1 nm. Some nanocrystals have a wurtzite structure, while others, a sphalerite one. The presence of cubic phase in the films is indicative of a nonequilibrium state of the nanocrystalline films. Thirty minutes after the onset of the formation of cadmium sulfide, the size and crystal structure of the constituent particles of the film become independent of the deposition time—only the film thickness increases. In addition, the initial stage of the formation of the cadmium sulfide film is accompanied by the deposition of cadmium hydroxide Cd(OH)2

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   P 97

    Pupyshev, A. A.
    Application of negative ions in inductively coupledplasma-mass spectrometry / A. A. Pupyshev, V. T. Surikov // Spectrochimica Acta B. - 2004. - Vol. 59. - P. 1021-1031 : il. - Bibliogr. : p. 1030-1031 (34 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СПЕКТРОМЕТРИЯ ПЛАЗМЕННАЯ -- ТЕРМОДИНАМИКА -- ИОНЫ ОТРИЦАТЕЛЬНЫЕ
Аннотация: The efficiency of the formation of negative background and F(-), Cl(-), Br(-) and I(-) ions in inductively coupled plasma (ICP) was investigated at temperatures ranging from 4000 to 9000 K using thermodynamic simulation. It was shown that the basic negative background ions in ICP, O(-), H(-), OH(-) and probably Ar(-), are in accordance with experiment. The estimated total concentration of negative ions in ICP was found to be four to five orders of magnitude smaller than that of positive ions. The highest efficiency of negative ion formation should be observed for elements having high electron affinity, namely Cl, F, Br and I. However, the detection sensitivity in the negative ion detection mode may be increased slightly as compared with the positive ion detection mode only for fluorine in the temperature range 6000–7000 K. This is in contradiction with experimental results and may be explained by the formation of negative ions behind the skimmer and/or smaller losses of negative ions in the ion beam at low ionic current. The relationship between the efficiency of negative atomic ion formation and electron affinity was determined. This makes it possible to estimate numerically the efficiency of the formation of Ar(-), Na(-) and other negative atomic ions in the ICP. The calculations performed confirmed the experimental data showing that the cation (Ba, Co, Cu, K, Na and Sr) introduced as a chloride does not affect the analytical signal of Cl(-). According to the calculations, high contents of halogens in samples are not expected to alter significantly the contents of F(-), Cl(-), Br(-) and I(-) measured in ICP as analytes. The experimentally observed significant suppression effect of high halogen concentrations may be caused by a shift of equilibrium in reactions of electron addition to halogen atoms behind the skimmer and/or increased negative ion current in the ion beam and accordingly greater losses of analytes

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   C 75


    Considering the Polynuclear Complexesin the Ionic Equilibria of the Pb2+–H2O System / N. S. Kozhevnikova, S. I. Sadovnikov, A. A. Uritskaya, A. I. Gusev // Russian Journal of General Chemistry. - 2012. - Vol. 82, № 4. - P. 626-634 : il. - Bibliogr. : p. 634 (36 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГИДРОКСИД СВИНЦА -- ИОННОЕ РАВНОВЕСИЕ
Аннотация: Analysis of conditions of the lead hydroxide and sulfide formation in the Pb2+–H2O system was carried out with accounting for the formation of polynuclear hydroxo-complexes. This allows predicting a possibility of the lead hydroxide formation in the solution before the beginning of the synthesis of lead sulfide. The domains of the stable formation of Pb(OH)2 and PbS were calculated for the systems containing lead citrate complexes and hydroxo-complexes. The proposed calculation method can be used for the quantitative determination of the reaction mixture composition and development of the chemical deposition technology of lead chalcogenides in different morphological forms: nanocrystalline powders (hydrophobic sol), quantum dots, heterostructures of the core@shell type or films. The proposed calculation method is applicable to other chalcogenide systems containing metal ions forming mononuclear and polynuclear hydroxo-complexes

\\\\Expert2\\nbo\\Russian Journal of General Chemistry\\2012, V. 82, N 4, p. 626–634.pdf
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   E 27


    Effect of Ethylene Glycol on the Formation of Extended Crystals of M1/3Co2/3C2O4(M = Zn, Mn) Oxalates and Their Thermolysis Products / O. I. Gyrdasova, V. N. Krasil'nikov, I. G. Grigorov, G. V. Bazuev // Russian Journal of Inorganic Chemistry. - 2006. - Vol. 51, № 6. - P949-955 : il. - Bibliogr. : p. 954-955 (19 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭТИЛЕНГЛИКОЛЬ -- ОКСАЛАТЫ -- ТЕРМОЛИЗ -- ЦИНК -- МАРГАНЕЦ
Аннотация: The effect of ethylene glycol (EG) on the formation of whiskers and fibers of complex oxides with the general formula MCo2O4 upon the thermolysis of M1/3Co2/3C2O4(M = Zn, Mn) oxalates has been studied. New compounds (solvates) are formed when powdered oxalates are heated with EG. In the solvates, EG molecules substitute for water molecules according to the reaction M1/3Co2/3C2O4· 2H2O + HOCH2CH2OH =M1/3Co2/3C2O4(HOCH2CH2OH) + 2H2O. The solvates have been characterized using X-ray powder diffraction, microscopy, IR spectroscopy, thermogravimetry, and chemical analysis. The shape, structure, and particle size of the thermolysis products of EG-modified oxalates have been determined using scanning electron microscopy

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   K 81

    Krasil'nikov, V. N.
    Ethylene Glycol-Modified Cobalt and Iron Oxalates As Precursors for the Synthesis of Oxides As Extended Microsized and Nanosized Objects / V. N. Krasil'nikov, O. I. Gyrdasova, G. V. Bazuev // Russian Journal of Inorganic Chemistry. - 2008. - Vol. 53, № 12. - P1854-1861 : il. - Bibliogr. : p. 1860-1861 (18 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭТИЛЕНГЛИКОЛЬ -- КОБАЛЬТ -- ОКСИДЫ -- ОКСАЛАТ ЖЕЛЕЗА
Аннотация: The reactions of ethylene glycol with iron and cobalt oxalates upon heating in air are reported. Heat treatment of mixtures of oxalate powders with ethylene glycol yields new compounds (solvates) via the replacement of the water molecules in the oxalate structure by ethylene glycol molecules: MC2O4·2H2O+HOCH2CH2OH=MC2O4(HOCH2CH2OH)+2H2O↑. The crystals resulting from this reaction are elongated, and their shape is inherited by their thermolysis products. Thermolysis in air yields microwhiskers and nanowhiskers of Fe2O3and Co3O4, and thermolysis in an inert atmosphere affords Fe3O4and Co whiskers. The thermolysis of FeC2O4(HOCH2CH2OH) in helium yields a new structural modification of FeC2O4 as an intermediate product. The resulting compounds and their thermolysis products were characterized by X-ray powder diffraction, microscopy, IR spectroscopy, and thermogravimetric and chemical analyses. The particle shape and size were determined by scanning electron microscopy

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   K 81

    Krasilnikov, V. N.
    Glycolic alcoholates formation in MmCuOn-ethylene glycol systems [] / V. N. Krasilnikov, V. V. Antsygina, G. V. Bazuev // Materials Research Bulletin. - 1996. - V. 31, N 5. - С. 565-572 . - ISSN 0025-5408

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОБРАЗОВАНИЕ ГЛИКОЛЯТОВ -- АЛКОГОЛЯТ ГЛИКОЛЯ -- МЕТОД РЕНТГЕНОВСКИЙ -- РЕНТГЕНОВСКИЙ МЕТОД -- МЕТОД ТЕРМОГРАВИМЕТРИЧЕСКИЙ -- ТЕРМОГРАВИМЕТРИЧЕСКИЙ МЕТОД -- АНАЛИЗ МИКРОСКОПИЧЕСКИЙ -- МИКРОСКОПИЧЕСКИЙ АНАЛИЗ -- ЭТИЛЕНГЛИКОЛЬ -- ФАЗЫ АМОРФНЫЕ -- АМОРФНЫЕ ФАЗЫ -- Ba -- Sr -- Ca -- БАРИЙ -- КАЛЬЦИЙ -- СТРОНЦИЙ
Аннотация: Проведен рентгеновский, микроскопический и термогравиметрический анализ взаимодействия Bi2-xSr2Ca2Cu3O10+y, Ca2CuO3, Sr2CuO3, CaSrCuO3, SrCuO2, BaCuO2 и Li2CuO2 с этиленгликолем при комнатной температуре. Показано, что результатом взаимодействия являются гликоляты. Выделены и идентифицированы соединения M2[Cu(CH2OCH2OH)6] (M = Ca, Sr), M[Cu(CH2OCH2OH)2] (M = Ba, Sr), Li2[Cu(CH2OCH2OH)4] и Li2[Cu(CH2OCH2OH)2(H2O)2]. Сложный купрат Bi2-xSr2Ca2Cu3O10+y при действии этиленгликоля дает смесь гликолятов и идентифицированную аморфную фазу

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   H 99


    Hydration and Proton Transport in Solid Solutions Based on Ba2CaWO6 / I. E. Animitsa, N. A. Kochetova, T. A. Denisova, N. A. Zhuravlev, I. V. Baklanova // Russian Journal of Physical Chemistry A. - 2009. - Vol. 83, № 2. - P197-202 : il. - Bibliogr. : p. 201 (12 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГИДРАТАЦИЯ -- ПРОТОННЫЙ ПЕРЕНОС -- ТВЕРДЫЕ РАСТВОРЫ -- ВОЛЬФРАМАТЫ ЩЕЛОЧНОЗЕМЕЛЬНЫХ МЕТАЛЛОВ
Аннотация: Hydrated alkaline-earth metal tungstates Ba4Ca2 +xW2 –xO12 – 2x with perovskite structure were studied by the thermogravimetry, 1H NMR, IR, and Raman spectroscopy methods. Electrical conductivity and transfer numbers were measured with varying T, Po2, and PH2O. The solid solutions are capable of reversibly intercalating water and can exhibit high-temperature proton transport. The localization of protons on oxygen results in the appearance of energetically nonequivalent OH groups; a small fraction of protons are present in the form of H2O and H3O+

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   I-76


    Ion State of Atoms and the Properties of Perovskite-Like Compound CaCu3V4O12 / V. L. Volkov, N. I. Kadyrova, G. S. Zakharova, M. V. Kuznetsov, N. V. Podval'naya, K. N. Mikhalev, Yu. G. Zainulin // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 3. - P329-333 : il. - Bibliogr. : p. 333 (16 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПЕРОВСКИТОПОДОБНЫЕ СОЕДИНЕНИЯ -- СТЕХИОМЕТРИЯ
Аннотация: The binding energies and valence state of atoms in the perovskite-like compound CaCu3V4O12 have been determined using XPS spectroscopy. The stoichiometry of this phase is formulated as Ca2+Cu2+(V2(5+)V2(4+)O12). Under an air atmosphere, the phase interacts with water vapor and oxygen. As a result, Ca(OH)2 is formed on its surface, the Cu+ and V4+ ion concentrations decrease, and the Cu2+ and V5+ concentrations increase in association. Raman spectra show shortened cation–anion bond lengths and cation–anion–cation bond angles in CaCu3V4O12 compared to perovskite CuVO3; the two structures are alike. The electrical conductivity, magnetic susceptibility, thermal and sensor properties of CaCu3V4O12 in aqueous salt solutions have been studied

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10.

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   V 86

    Volkov, V. L.
    Nanotubes in the V2O5 · nH2O Xerogel–Hydroquinone–H2O System / V. L. Volkov // Russian Journal of Inorganic Chemistry. - 2009. - Vol. 54, № 1. - P36-39 : il. - Bibliogr. : p. 39 (14 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НАНОТРУБКИ -- КСЕРОГЕЛИ
Аннотация: Layered (C6H4)0.11[VO2.34(OH)0.25] nanotubes (NTs) were prepared in the V2O5 · nH2O -hydroquinone–H2O system at 160–180°C for 5–7 days. Particle diameters were 40–60 nm; lengths do not exceed 1 μm, and the interlayer distance was 14.0 ± 0.1 Å. IR spectra, electrical conductivity, and thermal properties of nanotube powder were studied. The chemism of NT formation was determined, and a model of structure formation for these tubules was proposed

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11.

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   P 56


    Phase Transformations in gamma-Al(OH)3 under Heat Treatment in Air and Water Vapor / V. I. Lopushan, G. F Kuznetsov, R. N. Pletnev, D. G. Kleshchev // Bulletin of the Russian Academy of Sciences: Physics. - 2007. - Vol. 71, № 8. - P. 1187-1189 : il. - Bibliogr. : p. 1189 (9 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФАЗОВЫЕ ПЕРЕХОДЫ -- ТЕРМООБРАБОТКА -- АЛЮМИНИЙ
Аннотация: The kinetics and mechanism of phase transitions (PTs) in gibbsite (γ-Al(OH)3) under heat treatment in air and water vapor (170–550°C) have been investigated by iso- and nonisothermal thermogravimetry, X-ray phase analysis, transmission electron microscopy, 27Al nuclear magnetic resonance, and chemical analysis. It is shown that (i) the gibbsite PT in air involves two interrelated transformations occurring simultaneously:(1) gibbsite -> boehmite (γ-AlOOH) and (2) gibbsite -> X-ray-amorphous alumina (Al2O3); both areimplemented through the topochemical mechanism; and (ii) in water vapor only transformation of gibbsite into boehmite occurs (PT-3), which is implemented through the dissolution–precipitation mechanism. The apparent activation energies of the PTs under consideration have been determined

\\\\Expert2\\nbo\\Bulletin of the Russian Academy of Sciences Physics\\2007, V. 71, N 8, P. 1187-1189.pdf
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12.

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   P 93


    Proton magnetic resonance and the state of hydrogen in beryllium hydroxide / R. N. Pletnev, V. S. Kiiko, Yu. N. Makurin, A. A. Nepryakhin // Refractories and Industrial Ceramics. - 2005. - Vol. 46, № 4. - P273-275 : il. - Bibliogr. : p. 275 (8 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПРОТОННЫЙ МАГНИТНЫЙ РЕЗОНАНС -- ВОДОРОД -- ГИДРОКСИД БЕРИЛЛИЯ
Аннотация: Proton magnetic resonance spectra of beryllium hydroxide β-Be(OH)2 and products of its thermal decomposition are studied at room temperature and 123 K. It is shown, based on these spectra and differential thermal analysis and x-ray diffractometry data, that, heated to above 500 K, -Be(OH)2 decomposes into a finely dispersed BeO and H2O to convert finally to an amorphous beryllium oxyhydroxide. At above 600 K, a crystalline BeO is formed involving dehydration of the finely dispersed BeO and amorphous oxyhydroxide phase

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13.

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   S 98


    Synthesis and Photocatalytic Activity of Ti[1 – x]VxO[2 – y]Cy Whiskers in Hydroquinone Oxidation in Aqueous Solutions / V. N. Krasil'nikov, A. P. Shtin, O. I. Gyrdasova, E. V. Polyakov, L. Yu. Buldakova, M. Yu. Yanchenko, V. M. Zainullina, V. P. Zhukov // Russian Journal of Inorganic Chemistry. - 2010. - Vol. 55, № 8. - P1184-1191 : il. - Bibliogr. : p. 1190-1191 (28 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФОТОКАТАЛИТИЧЕСКАЯ АКТИВНОСТЬ -- ГИДРОХИНОН -- ВАНАДИЙ
Аннотация: Ti1–xVxO2–yCy (0 ≤ x ≤ 0.10 and x = 0.50) whiskers having the anatase structure were synthesized via thermolysis of vanadium doped titanium glycolate of composition Ti1–xVx(OCH2CH2O)2 (0 ≤ x ≤ 0.10 and x = 0.50). The starting reagents used to prepare Ti1–xVx(OCH2CH2O)2 were mixtures of coprecipitated titanium and vanadyl hydroxides, which were heated in ethylene glycol at T ≤ 200°C: (1 – x)TiO(OH)2 + xVO(OH)2 + 2HOCH2CH2OH = Ti1–xVx(OCH2CH2O)2 + 3H2O↑. Thermolysis of vanadium doped titanium glycolate in various gas media over a wide range of temperatures is useful to prepare titania samples doped with both vanadium and carbon to form a phase of the general composition Ti1 – xVxO2 – yCy whiskers prepared by thermolyzing Ti1 – xVx(OCH2CH2O)2 in air at 450°C were found to have a high photocatalytic activity in hydroquinone oxidation in aqueous solutions irradiated in the UV spectral range; the photocatalyst’s activity increases with increasing vanadium concentration. When hydroquinone was irradiated in the blue, the maximal catalytic activity was discovered in a sample of composition Ti0.50V0.50O2–yCy. Quantum chemical calculations support experimental data that the double doping of titania (Ti1–xVxO2–yCy) enhances its photocatalytic activity compared to undoped anatase or anatase doped in one sublattice: Ti1–xVxO2 and TiO2–yCy alytic activity compared to undoped anatase or anatase doped in one sublattice: Ti1–xVxO2 and TiO2–yCy.

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14.

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   S 98


    Synthesis and Properties of Pbl - xVxO2-x(OH)x Solid Solutions / V. L. Volkov, G. S. Zakharova, M. V. Kuznetsov, V. G. Zubkov, I. F. Berger, A. P. Tyutyunnik // Inorganic Materials. - 2000. - Vol. 36, № 1. - P. 57-62 : il. - Bibliogr. : p. 53 (9 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
РАСТВОРЫ ТВЕРДЫЕ -- ОКСОВАНАДАТ СВИНЦА -- СТЕХИОМЕТРИЯ -- ПРОВОДИМОСТЬ
Аннотация: Pbl- xWxO2 x(OH)x (0 < X --< 0.30) solid solutions with the rutile structure were prepared by reacting humid [3-PbO 2 + V205 mixtures at temperatures from 200 to 250~ At higher vanadium contents, lead hexavanadate, PbV6Ol6 , was formed, as inferred from IR spectroscopy data. The structural and electrical properties of the solid solutions were studied, and the valence state of the constituent ions was determined. All of the vanadium has a valence of 4+ for x < 0.06 and 5+ for x > 0.15. The lead ions are in the oxidation states 4+ and 2+ over the entire range of solid solution

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15.

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   S 98


    Synthesis and Properties of Titanium Glycolate Ti(OCH2CH2O)2 / V. N. Krasil'nikov, A. P. Shtin, O. I. Gyrdasova, E. V. Polyakov, G. P. Shveikin // Russian Journal of Inorganic Chemistry. - 2008. - Vol. 53, № 7. - P1065-1069 : il. - Bibliogr. : p. 1069 (21 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГЛИКОЛЯТ ТИТАНА -- ДИОКСИД ТИТАНА -- НАНОТЕХНОЛОГИИ
Аннотация: A new efficient method for the synthesis of extended micro- and nano-sized crystals (whiskers, fibers) of titanium glycolate Ti(OCH2CH2O)2 has been suggested. The method implies the reaction of hydrated titanium dioxide with ethylene glycol on heating in air. Thermolysis of Ti(OCH2CH2O)2 in air gives titanium dioxide as anatase (400–500°C) and rutile (T> 700°C), the morphology of titanium glycolate crystals being inherited by the oxide. The pseudocrystals of the thermolysis product in an inert gas medium (T=500–950°C) represent aglomeration of nano-sized titanium dioxide particles and amorphous carbon. At temperatures up to 1300°C, the formation of the TiO2–xCx phase with a rutile structure is probable. In a wet air environment, titanium glycolate is partially hydrolyzed to give TiOx(OCH2CH2O)2–2x(OH)2x·xH2O(0≤x≤1) and on keeping in water at room temperature, ethylene glycol is completely displaced from the crystals. This process is also not accompanied by changes in the particle morphology

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16.

Инвентарный номер: нет.

   G 99

    Gyrdasova, O. I.
    Synthesis of Micro- and Nanosized Manganese Oxides from Hydrated Manganese Oxalates and Products of Their Chemical Modification with Ethylene Glycol / O. I. Gyrdasova, V. N. Krasil'nikov, G. V. Bazuev // Russian Journal of Inorganic Chemistry. - 2009. - Vol. 54, № 7. - P1035-1040 : il. - Bibliogr. : p. 1040 (9 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОКСИД МАРГАНЦА -- ОКСАЛАТЫ -- ЭТИЛЕНГЛИКОЛЬ
Аннотация: The reactions of ethylene glycol with manganese oxalates MnC2O4·2H2O and MnC2O4·3H2O on heating in air were studied. At temperature below 100°C, ethylene glycol was found to displace water from oxalates to give a new solvate compound according to the reaction MnC2O4·nH2O+HOCH2CH2OH=MnC2O4(HOCH2CH2OH) +nH2O↑. The crystals of the solvates retain the morphology of the initial oxalates, which is then inherited by the products of their thermolysis. Thus, thermolysis of MnC2O4·3H2O and MnC2O4(HOCH2CH2OH) having quasi-unidimensional structure gave Mn3O4 and Mn2O3nanowhiskers in air and MnO in an inert gas environment. Heating of MnC2O4·nH2O in ethylene glycol at temperatures above 100°C results in anhydrous manganese oxalate

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17.

Инвентарный номер: нет.

   S 98


    Synthesis, Physicochemical Properties, and Electrode Behavior of Ni2[Ni(OH)6W6O18] · 8H2O / E. V. Polyakov, T. A. Denisova, L. G. Maksimova, O. I. Gyrdasova, L. I. Manakova // Inorganic Materials. - 2002. - Vol. 38, № 9. - P. 956-961 : il. - Bibliogr. : p. 961 (14 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГЕКСАВОЛЬФРАМОНИКЕЛАТ НИКЕЛЯ -- ЯДЕРНЫЙ МАГНИТНЫЙ РЕЗОНАНС -- ЯМР
Аннотация: Nickel(II) hexatungstonickelate(II) was synthesized and characterized by elemental analysis, x-ray diffraction, thermal analysis, IR spectroscopy, and 1H nuclear magnetic resonance. The results demonstrate that constitutional water is present in the form of OH groups, which can be removed by heating to 230–370 °C. The chemical formula of the compound is Ni2[Ni(OH)6W6O18] ·8H2O. Nickel(II) hexatungstonickelate(II), a poorly soluble compound, was tested as an electrode for Ni(II) determination in solution. Its electrode properties and selectivity for other ions suggest that it is a promising material for such applications. At pH 5, the ionselective electrode we fabricated has a Nernstian response to Ni(II) (10–5 to 10–1 mol/l) which is close to that predicted theoretically

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18.

Инвентарный номер: нет.

   T 44


    The Synthesis of Nucleus–Shell Cd(OH)2/CdS Structures by Chemical Precipitation from Aqueous Solutions / A. S. Vorokh, N. S. Kozhevnikova, A. A. Uritskaya, A. Magerl // Russian Journal of Physical Chemistry A. - 2008. - Vol. 82, № 7. - P. 1132-1137 : il. - Bibliogr. : p. 1137 (16 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КАДМИЙ -- СУЛЬФИД КАДМИЯ -- РАСТВОРЫ ВОДНЫЕ -- ОСАЖДЕНИЕ
Аннотация: The region of stable coexistence of Cd(OH)2 and CdS as a function of pH and the concentration of the complex-forming agent (ammonia) was determined by thermodynamic analysis with the purpose of the preparation of Cd(OH)2 cadmium hydroxide particles surrounded by cadmium sulfide CdS shells. In this region, powders were obtained by chemical precipitation during various precipitation times from aqueous solutions. X-ray diffraction was used to track the growth of the CdS nanophase of a disordered structure and hexagonal Cd(OH)2 phase consumption with time. It was found by complexonometry that part of cadmium formed insoluble structures as a result of the formation of continuous nanosized CdS shells on single crystalline Cd(OH)2 particles. A comparative analysis of the experimental data was used to determine the kinetics of formation of nucleus–shell Cd(OH)2/CdS particles in the system

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19.

Инвентарный номер: нет.

   V 18


    Valence state of atoms in the perovskite-like phase SrxCu3V4O12 (x = 0.67-1.0) and its properties [Text] / V. L. Volkov, N. I. Kadyrova, G. S. Zakharova, M. V. Kuznetsov, N. V. Podval'naya, K. N. Mikhalev, Yu. G. Zainulin // Inorganic Materials. - 2007. - Vol. 43, № 6. - P660-665 : il. - Библиогр. : с. 665 (7 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ПЕРОВСКИТОПОДОБНЫЕ ФАЗЫ -- ФОТОЭЛЕКТРОННАЯ СПЕКТРОСКОПИЯ -- ВАНАДИЙ
Аннотация: We report the first synthesis, at high pressure and temperature (p= 6.0–8.0 GPa, t= 1000°C), of SrxCu3V4O12(x= 0.67–1.0), a cation-deficient perovskite-like phase of variable composition (sp. gr.Im, Z= 2). Using x-ray photoelectron spectroscopy, we have determined the binding energies and valence states of atoms in SrxCu3V4O12. The stoichiometric composition of this phase can be represented by the chemical formula Sr2+Cu2+(V2(5+) V2(4+) )O12. Air exposure leads to the formation of SrCO3 and Sr(OH)2 on its surface and to the oxidation of univalent copper and tetravalent vanadium. According to IR spectroscopy data, the penta- and tetravalent vanadium in the high-pressure phase is in octahedral oxygen coordination. The electrical conductivity, magnetic susceptibility, thermal properties, and ion selectivity of this compound have been investigated

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20.

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   V 26


    Vanadyl and Titanium Glycolates as Precursors for the Preparation of Oxide Materials in the Form of Elongated Microparticles and Nanoparticles / V. N. Krasil'nikov, A. P. Shtin, O. I. Gyrdasova, I. V. Baklanova, L. A. Perelyaeva // Nanotechnologies in Russia . - 2008. - Vol. 3, № 1-2. - P106-111 : il. - Bibliogr. : p. 110-111 (14 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГЛИКОЛЯТ ВАНАДИЛА -- ГЛИКОЛЯТ ТИТАНА -- ОКСИДЫ -- НАНОЧАСТИЦЫ
Аннотация: This paper reports on the results of investigations of the optimum conditions for the formation and properties of vanadyl and titanium glycolates of the compositions VO(OCH2CHO) and Ti(OCH2CH2O)2 with elongated crystals, as well as solid solutions of the composition Ti1–xVx(OCH2CH2O)2(0
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