P 59 Physico-chemical foundations of using lead and tin(II) ferrocyanides as the precursores for synthesis of molecular magnets [Text] / E. V. Polyakov, L. G. Maximova, T. A. Denisova, V. G. Zubkov, A. P. Tyutyunnick, N. A. Zhuravlev, O. N. Leonidova> // Physics and chemistry of novel materials: 4th Bilateral Russian-German Symposium (Febr. 24-March 1, 1999): Progr. and abstr. - 1999. - P2.26 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): Pb -- СВИНЕЦ -- Sn -- ОЛОВО -- ФЕРРОЦИАНИДЫ -- СВОЙСТВА МАГНИТНЫЕ -- МАГНИТНЫЕ СВОЙСТВА -- ФИЗИКО-ХИМИЧЕСКИЕ СВОЙСТВА -- СВОЙСТВА ФИЗИКО-ХИМИЧЕСКИЕ -- ХИМИЯ ТВЕРДОГО ТЕЛА -- СИНТЕЗ |
P 80 Polyakov, E. V. Interaction of Sr-90 with SO(2-)4, HCO(-)3 and CO(2-)3 ions in aqueous solutions of low salinity [Text] / E. V. Polyakov, G. N. Ilves, Yu. V. Egorov> // 13th Radiochem. Conf., Marianske Lazne - Jachymov, 19th-24th Apr., 1998: Booklet Abstr. - 1998. - P327 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): Sr-90 -- ИОНЫ -- ВЗАИМОДЕЙСТВИЕ ИОНОВ -- РАСТВОРЫ ВОДНЫЕ -- ВОДНЫЕ РАСТВОРЫ -- СТРОНЦИЙ-90 -- РАДИАЦИОННОЕ ИЗЛУЧЕНИЕ -- ИЗЛУЧЕНИЕ РАДИАЦИОННОЕ |
P 80 Polyakov, E. V. Physico-chemical modelling for sorption reactivity of true trace colloids [Text] / E. V. Polyakov, Yu. V. Egorov, G. N. Ilves> // 13th Radiochem. Conf., Marianske Lazne - Jachymov, 19th-24th Apr., 1998: Booklet Abstr. - 1998. - P325 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МОДЕЛИРОВАНИЕ ФИЗИКО-ХИМИЧЕСКОЕ -- ФИЗИКО-ХИМИЧЕСКОЕ МОДЕЛИРОВАНИЕ -- СОРБЦИЯ -- СПОСОБНОСТЬ РЕАКЦИОННАЯ -- РЕАКЦИОННАЯ СПОСОБНОСТЬ -- КОЛЛОИДЫ ИНДИКАТОРНЫЕ -- ИНДИКАТОРНЫЕ КОЛЛОИДЫ |
A 57 Anhydrous tin and lead hexacyanoferrates (II)/ Part 1. Synthesis and crystal structure [] / V. G. Zubkov, A. P. Tyutyunnik, I. F. Berger, L. G. Maksimova, T. A. Denisova, E. V. Polyakov> // Solid State Sciences. - 2001. - V. 3, N 3. - С. 361-367 . - ISSN 1293-2558 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОЛОВО -- СВИНЕЦ -- Pb -- Sn -- Fe -- ЖЕЛЕЗО -- ГЕКСАЦИАНОФЕРРАТЫ -- СИНТЕЗ -- КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА -- СТРУКТУРА КРИСТАЛЛИЧЕСКАЯ -- АТОМЫ -- НЕЙТРОННАЯ ДИФРАКЦИЯ -- ДИФРАКЦИЯ НЕЙТРОННАЯ -- ПОРОШКОВАЯ ДИФРАКЦИЯ -- ДИФРАКЦИЯ ПОРОШКОВАЯ Аннотация: The crystal structure of Pb2Fe(CN)6 has been first determined and refined using the Rietveld method with combined Cu---Kalpha1 X-ray and constant-wavelength neutron powder difraction data in space group P-3 (147, Z = 1). The unit cell constants are a = 7.1346(1) and 7.1805(1) A, c = 5.4531(2) and 5.3639(1) A, respectively. The compounds are layered, groups of three nearest [Fe(CN)6](4-)-complexes are joined to layers by means of Pb or Sn atoms. The same Pb or Sn atoms (c.n. = 3+3) joint three nearest complexes from the next layer. The jointing goes through 'nitrogen---lead(tin)---nitrogen' bonds |
S 98 Synthesis and crystal structure of anhydrous Pb2Fe(CN)6 [] / V. G. Zubkov, A. P. Tyutyunnik, I. F. Berger, L. G. Maksimova, T. A. Denisova, E. V. Polyakov, I. G. Kaplan, V. I. Voronin> // Physics and chemistry of novel materials: 4th Bilateral Russian-German Symposium (Febr. 24-March 1, 1999): Progr. and abstr. - 1999. - С. 2.40 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СТРУКТУРА КРИСТАЛЛИЧЕСКАЯ -- КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА -- ЦИАНОФЕРРАТЫ -- МЕТОД РЕНТГЕНОВСКОЙ СПЕКТРОСКОПИИ -- Fe -- ЖЕЛЕЗО -- Pb -- СВИНЕЦ -- ХИМИЯ |
P 29 Particle-size hierarchy in zirconium hydroxide deposits on inert supports [Text] / G. P. Shveikin, A. P. Shtin, E. V. Polyakov, T. A. Denisova, Ya. N. Blinovskov, I. G. Grigorov, A. N. Khlebnikov> // Inorganic Materials. - 2005. - Vol. 41, № 5. - P. 476-482 : il. - Библиогр. : с. 482 (22 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГИДРОКСИД ЦИРКОНИЯ -- НАНОЧАСТИЦЫ -- ГИДРОКСИД ТИТАНА Аннотация: Experimental data are presented on the structure, composition, size, and proton configuration of zirconium hydroxide particles prepared by precipitation from sulfate solutions with and without inert supports (acetylene black). It is shown that growing zirconium hydroxide particles have an hierarchical structure with a constant ratio of the average particle sizes between two consecutive levels of the hierarchy. This feature is common to titanium and zirconium hydroxide nanoparticles, which, however, differ in reactivity Полный текст |
H 65 Hierarchy of sizes and sorption selectivity of ultrafine particles of hydrated titania [Текст] / G. P. Shveikin, E. V. Polyakov, T. A. Denisova, I. G. Grigorov, A. P. Shtin> // International Journal of Nanotechnology. - 2006. - Vol. 3, № 1. - С. 39-46 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
M 61 Metatitanic acid: synthesis and properties [Текст] / T. A. Denisova, L. G. Maksimova, E. V. Polyakov, N. A. Zhuravlev, S. A. Kovyazina, O. N. Leonidova, D. F. Khabibulin, E. I. Yur`eva> // Zhurnal Neorganicheskoi Khimii. - 2006. - Vol. 51, № 5. - С. 757-766 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
H 65 Hierarchy of sizes and sorption selectivity of ultrafine particles of hydrated titania [Текст] / G. P. Shveikin, E. V. Polyakov, T. A. Denisova, I. G. Grigorov, A. P. Shtin> // International Journal of Nanotechnology. - 2006. - Vol. 3, № 1. - С. 39-46 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
V 58 Vibrational spectra of tin and lead cyanoferrate(II) and cyanoferrate(III) complexes [Текст] / T. A. Denisova, L. G. Maksimova, S. A. Kovyazina, E. V. Polyakov, V. M. Zainullina, N. A. Zhuravlev, V. G. Zubkov, A. P. Tyutyunnik, O. V. Koryakova> // Zhurnal Neorganicheskoi Khimii. - 2004. - Vol. 49, № 9. - С. 1531-1537 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
V 88 Voltammetric study of anodic oxidation of titanium carbide nitride and carbonitride in solutions of mineral acids [Текст] / D. I. Kurbatov, L. Yu. Buldakova, V. A. Zhilyaev, E. V. Polyakov, A. Yu. Sizov> // Zavodskaya Laboratoriya, Diagnostika Materialov. - 2005. - Vol. 71, № 12. - С. 7-9 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
P 80 Polyakov, E. V. Physico-chemical modelling of the sorption reactivity of true trace colloids / E. V. Polyakov, Yu. V. Egorov, G. N. Ilves> // Czechoslovak Journal of Physics. - 1999. - Vol. 49 , Suppl.1. - P773-781 : il. - Bibliogr. : p. 781 (9 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МОДЕЛИРОВАНИЕ ФИЗИКО-ХИМИЧЕСКОЕ -- СОРБЦИЯ -- КОЛЛОИДЫ Аннотация: Physico-chemical model of trace hydrolyzed element adsorption by H-form of ion-exchangeresin is considered. The model implies the existence of both ionic forms and trace hydroxide colloids in aqueous phase and predicts two sharp maxima separated by a plateau on the adsorption diagram. It is shown that complicated adsorption profile arises as a result of superposition of the trace hydroxide colloid formation/dissolution by-processes accompanied by irreversible ageing of the colloid \\\\Expert2\\nbo\\Czechoslovak Journal of Physics\\1999, V. 49, Supplement 1, p.773-781.pdf |
B 39 Behavior of Monazite Components in Humic Acid Solutions / E. V. Polyakov, I. V. Volkov, V. T. Surikov, L. A. Perelyaeva, G. P. Shveikin> // Doklady Chemistry. - 2009. - Vol. 248, № 2. - P. 242-245 : il. - Bibliogr. : p. 244-245 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАСТВОРЫ -- ГУМИНОВАЯ КИСЛОТА -- ФОСФАТЫ -- МОНАЦИТ |
T 44 Thermally Stimulated Transformation of Micellar Tungsten Glycolate into Nanodisperse Tungsten Carbide / E. V. Polyakov, L. G. Maksimova, V. N. Krasil'nikov, V. A. Zhilyaev, T. A. Timoshchuk, O. N. Ermakova, G. P. Shveikin, I. V. Nikolaenko> // Doklady Physical Chemistry. - 2010. - vol. 434, № 1. - P. 154-157 : il. - Bibliogr. : p. 157 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КАРБИД ВОЛЬФРАМА -- ГЛИКОЛЯТ ВОЛЬФРАМА -- ПОРОШКИ НАНОДИСПЕРСНЫЕ \\\\Expert2\\nbo\\Doklady Physical Chemistry\\2010, V. 434, N 1, p. 154-157.pdf |
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.) 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 Полный текст |
T 93 Tungstate-Selective Electrode / E. V. Polyakov, L. I. Manakova, L. G. Maksimova, T. A. Denisova, O. I. Gyrdasova> // Journal of Analytical Chemistry. - 2002. - Vol. 57, № 5. - P452-455 : il. - Bibliogr. : p. 454-455 (26 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ВОЛЬФРАМАТСЕЛЕКТИВНЫЕ ЭЛЕКТРОДЫ -- СЕНСОРЫ Аннотация: A chemical sensor for tungstate ions has been developed and implemented in two versions on the basis of the poorly soluble nickel(II) hexatungstonickelate(II) heteropoly compound. The electrode function is linear within the range 10–5–10–1 M tungsten for the film electrode and within the range 10–4–10–1 M tungsten for the coated wire electrode at pH 6–9. The slope of the electrode function is 28–29 mV. The time it takes to attain an equilibrium electrode potential is 1–5 min, depending on the ion concentration to be determined. The selectivity coefficients are found for the tungstate-selective electrode in the presence of chloride, sulfate, nitrate, and perchlorate Полный текст |
S 70 Solubility of monazite chemical components in humic acid solutions / E. V. Polyakov, V. L. Volkov, V. T. Surikov, L. A. Perelyaeva> // Journal of Radioanalytical and Nuclear Chemistry. - 2010. - Vol. 286. - P707-711 : il. - Bibliogr. : p. 711 (17 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): МОНАЦИТ -- ГУМИНОВАЯ КИСЛОТА -- РАСТВОРИМОСТЬ -- РЕДКОЗЕМЕЛЬНЫЕ ЭЛЕМЕНТЫ -- ФОСФАТЫ Аннотация: Using physicochemical methods we showed that continuous (15 days) exposure of monazite powder in humic acid (HA) solutions with different acidity gives rise to one to two orders of magnitude growth in the concentration of the monazite’ p-, d- and f-elements of Periodic Table (Mg, Al, Si, P, Pb, Ti, Bi, Sc, Ti-Zn, REE, Th, U). The growth in the elements concentration in the humic solutions contacting monazite is shown to depend on the initial concentration of HA in the solutions, pH. It is concluded that these factors should be taken into consideration when inorganic phosphates and alike phases are used as a matrix for the radionuclide wastes solidification Полный текст |
E 43 Electronic Structure and the Optical and Photocatalytic Properties of Anatase Doped with Vanadium and Carbon / V. M. Zainullina, V. P. Zhukov, V. N. Krasil'nikov, M. Yu. Yanchenko, L. Yu. Buldakova, E. V. Polyakov> // Physics of the Solid State. - 2010. - vol. 52, № 2. - P271-280 : il. - Bibliogr. : p. 279-280 (45 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): АНАТАЗ -- ВАНАДИЙ -- КАРБОН -- ФОТОКАТАЛИТИЧЕСКИЕ СВОЙСТВА -- ЭЛЕКТРОННАЯ СТРУКТУРА Аннотация: The electronic structures of undoped anatase and anatase doped with carbon and vanadium have been calculated using the ab initio tight binding linear muffin tin orbital (TB-LMTO) method in the LSDA + U approximation. It has been shown that the doping of TiO2 leads to the formation of narrow bands of the C and V impurity states in the band gap. The calculations of the imaginary part of the dielectric function have made it possible to estimate the intensity of the optical absorption. It has been established that the doping with vanadium and carbon leads to optical absorption in the visible range and to an increase in the absorption in the ultraviolet range up to 4 eV. This should result in an increase in the photocatalytic activity on the surface of the doped anatase. The experimental determination of the photocatalytic activity of whiskers of the anatase doped with carbon and vanadium in the reaction of hydroquinone oxidation has confirmed the increase in the activity of the doped materials under exposure to ultraviolet, visible, and blue light. The phenomenon of dark catalysis in the anatase doped with carbon and vanadium has been interpreted within the concept of low-energy electronic excitations between the impurity levels of carbon Полный текст |
P 80 Polyakov, E. V. Effect of Inorganic Anions on the Physicochemical State of Radionuclides in Process Freshwater Basins at the Mayak Production Association / E. V. Polyakov, G. N. Ilves> // Radiochemistry. - 2001. - Vol. 43, № 5. - P532-539 : il. - Bibliogr. : p. 538-539 (28 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАДИОНУКЛИДЫ -- СОРБЦИЯ Аннотация: Published data on the speciation of microcomponents and radionuclides (calcium, strontium, plutonium, and americium) in the water and bottom sediments of selected process water basins at the Mayak Production Association were discussed in terms of the model of the sorption behavior of a sorbate existing in several forms. It was shown that distribution of calcium, 90Sr, and natural isotopes of strontium does not contradict the views on formation of Ca2+, CaSO4 0 , Sr2+, SrSO4 0 , Sr[SO4]2(2) ionic and molecular species and of colloidal sulfate (CaSO4 .2H2O) at selected sites of the water basin. By combining these factors it is possibleto explain the variation in the distribition coefficients of Ca, Sr, Pu, and Am in the water3bottom sedimentssystem in terms of the model of ion-exchange sorption in the presence of nonsorbable nonequilibrium colloid Полный текст |
C 70 Colloidal Chemical Extraction of Calcium Sulfate and Sorption of Microcomponents of Fresh Water on Calcium Sulfate / E. V. Polyakov, N. N. Emel'yanova, V. T. Surikov, G. N. Ilves> // Radiochemistry. - 2003. - Vol. 45, № 1. - P47-50 : il. - Bibliogr. : p. 50 (18 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СУЛЬФАТ КАЛЬЦИЯ -- СОРБЦИЯ -- КОЛЛОИДНО-ХИМИЧЕСКАЯ ЭКСТРАКЦИЯ Аннотация: Experimental data on colloidal chemical extraction of calcium sulfate formed in supersaturated solutions in fresh water are discussed. When the product of activities of calcium and sulfate ions is artificially exceeded, a nonequilibrium phase with the solubility close to that of CaSO4 is formed. This phase is extracted into a paraffin melt. Colloidal-chemical extraction of calcium sulfate with paraffin melt and sorption of microcomponents (single-, double-, and triple-charged cations) on calcium sulfate precipitates were studied. The precipitate has high affinity for cesium traces (Kd ~10(3) mg g1) in supersaturated solutions. Some cation species are not sorbed on the precipitate Полный текст |