Abstract— We review state-of-the-art progress in the field of graphene oxide, a material that has a wide range of applications due to its unique properties, for example, the dielectric properties of graphene oxide can be used in memristors, the use of different degrees of reduction allows creating multipolar electrodes of lithium-ion batteries and supercapacitors, various oxygen-containing functional

Abstract Structural features of 16 mononuclear monooxotantalum complexes have been considered. In eleven compounds (I–XI), the Та(V) atoms have different coordination polyhedra with CNTa from four and seven: a tetrahedron, octahedron, pentagonal bipyramid, and monocapped trigonal prism. Five TaO compounds (XII–XVI) contain pentahapto-bonded η5-С5Ме5 (η5-Ср*) and η5-С5Н4SiМе3 ligands. In complexes II–X

Abstract— This review examines the state of art in research aimed at the development of electronic paper (electronic ink, e-ink), namely, the general principles to design a colloidal system with desired properties, having sedimentation and aggregate stability, consisting of a dispersed phase (reverse-micellar nanoreactors based on pigments) and a dispersion phase (nonpolar solvent/surfactant). More

Abstract The scheme of temperature-dependent topologic transformations in water–oxyethylated nonylphenol–MgCl2 phase diagrams was proved experimentally. An immiscibility area appears in the homogeneous area; it is bounded by a looped binodal curve and expands as temperature rises. The monotectic equilibrium area appears when the binodal curve touches the salt solubility line. The increasing neonol

Abstract Exposure to neutron radiation is an efficient way to enter dosed amounts of defects into the crystal and real structures of advanced inorganic materials. Thus-gained experimental data are of importance for both fundamental radiation materials science and for finding ways of usefully modifying the effect of radiation on the properties of practically important multifunctional materials with

Abstract Based on a comparison of the spectral data of dimethylsulfonium derivatives of polyhedral boron hydrides and dimethylsulfide complexes of tantalum and niobium pentahalides, an analogy has been recognized between the Lewis acidity of quasiborinium cations formed upon the removal of the hydride ion from polyhedral boron hydrides, on the one hand, and tantalum and niobium pentahalides, on the

Abstract Bi5O7I nanoplates as visible-light-driven photocatalyst have been synthesized by PVP assisted hydrothermal method. The effect of weight content of PVP adding on phase, morphology, and photocatalytic activities of products has been studied. The products have been characterized by X-ray powder diffraction, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS)

Abstract In view of the wide use of titanium dioxide, more and more approaches to 3D printing of materials based on it have recently been developed, the most promising if which remains stereolithography 3D printing owing to high resolution and low power consumption. It was studied how the degree of crystallinity of titanium dioxide affects both the properties of the obtained suspensions for stereolithography

Abstract A praseodymium stannate sample, Pr2Sn2O7, was synthesized by ceramic route (solid-phase reaction of oxides) at high temperature and characterized by X-ray diffraction analysis, X-ray fluorescence analysis, and scanning electron microscopy. The heat capacity measurements by adiabatic and differential scanning calorimetry in the temperature range 7.9–1345 K made it possible to calculate the

Abstract Specific features of the synthesis of sialons (SiAlON) in the Si–Al–O–N system by firing at 1600–1700°C in a nitrogen atmosphere of mixtures of different initial compositions corresponding to the same composition of the final product Si3Al3O3N5 have been studied. β-Sialon was synthesized from reaction mixtures based on crystalline silicon and aluminum nitrides and amorphous highly dispersed

Abstract The condensation of m-aminobenzoic acid with dichloroglyoxime has resulted in a new dioxime, di-m-aminobenzoyl glyoxime (DmabaH4) (I). Based on the latter, coordination 2D polymers {[Zn(DmabaH2)(H2O)(dmf)] ⋅ dmf}n (II), {[Cd(DmabaH2)(H2O)2] ⋅ 0.5dmf ⋅ 4H2O}n (III), and {[Mn(DmabaH2)(H2O)(dmf)] ⋅ dmf}n (IV) have been sythesized. The compositions and structures of new Zn(II), Cd(II), and Mn(II)

Abstract Kinetic study of adsorption and removal capability towards coexistent acidic and basic dyes in the polluted waste water using poly-o-toluidine-zirconium phosphoborate nanocomposite has been done. Poly-o-toluidine-zirconium phosphoborate nanocomposite synthesized by controlled sol-gel process were characterized using X-ray diffraction, scanning electron microscope, transmission electron microscope

Abstract Densities of sodium hypophosphite aqueous solution (NaH2PO2) with the molality varied from 1.019143 to 10.43887 mol kg–1 at temperature intervals of 5 K range from 283.15 to 363.15 K at 101.325 kPa were measured by a precise Anton Paar Digital vibrating-tube densimeter. From the density data, the thermal expansion coefficients, apparent volume and partial molar volumes were obtained. According

Abstract Experimental justification has been provided for the possibility of extractive isolation of technetium from raffinate of technical process of affinage of uranium–plutonium product resulting from hydrometallurgical reprocessing of spent nuclear fuel (SNF). Technetium (VII) from aqueous solution of Zr(IV) (10 g/L) and 4 mol/L HNO3 with small content of ZrOb+ and \({\text{Z}}{{{\text{r}}}_{{

Abstract— Phase equilibria in the quaternary reciprocal water–salt systems K+, Na+||\({\text{HCO}}_{{\text{3}}}^{-},\)HCOO––H2O and K+, Na+||\({\text{CO}}_{{\text{3}}}^{{{\text{2}}-}},\) HCOO––H2O at 25°C were studied for the first time. A theoretical calculation determined that the stable pair of salts in the systems are sodium formate and sodium carbonate or bicarbonate. Analysis of the obtained

Abstract Nano-cage based materials are nowadays broadly investigated due to their potential applications as biosensors and drug delivery systems. In the current study, we evaluated the adsorption behavior of Aromasin (AMS) drug on C20 and C24 nano-cages at the PBE/6-311G** level of theory. AMS drug can be adsorbed on the C20 and C24 nano-cages generally via their C=O and C–H groups. The physisorption

Abstract Monoclinic M-type europium orthotantalate was obtained by co-precipitation and annealing at ~1673 K and characterized by X-ray powder diffraction, scanning electron microscopy, and chemical analysis. The temperature dependence of molar heat capacity of M-EuTaO4 was measured by adiabatic calorimetry at 8–350 K; the thermodynamic functions (entropy, enthalpy change, and reduced Gibbs free energy)

Abstract Kinetics of catalytic CO oxidation on the surface of metal oxide catalysts decorated with noble metals used as gas-sensing materials for sensors has been studied. The majority of oxide materials (SnO2, Al2O3, zeolite, etc.) decorated with palladium and rhodium shows kinetic features resulting in ambiguous sensor response. Exception is CeO2/ZrO2 decorated with palladium: oxidation rate on this

Abstract Crystallochemical analysis with the use of Voronoi–Dirichlet polyhedra (VDPs) has been performed for 711 sulfides, whose structures contain 1199 coordination polyhedra LnSn, where Ln is a lanthanide from La to Lu. It has been established that the sulfides incorporate Ln(II), Ln(III), and Ce(IV) atoms bonding from 6 to 10 sulfur atoms, which exist in the form of S2– or S– ions. The VDP parameters

Abstract Some results on the mechanochemical synthesis of apatites with simultaneous substitutions of calcium by lanthanum and of phosphate by silicate are presented. The reagents of reaction mixtures are taken such that to synthesize the compounds containing equal concentrations of lanthanum and silicon. The synthesis is performed in an AGO-2 planetary mill. The complete conversion of initial reagents

Abstract The phase formation in the sections Ag2Se–Cu2SnSe3 and Ag8SnSe6–Cu2SnSe3 of the quasi-ternary system Ag2Se–SnSe2–Cu2Sе was studied for the first time by differential thermal analysis (with thermodynamic calculations), X-ray powder diffraction analysis, and microstructural analysis and also by microhardness and density measurements. No new quaternary compounds were detected. It was determined

Abstract Disaggregation of nanosized powders synthesized in liquid media is an urgent task of modern industry. On the example of nanoboehmite suspensions obtained by hydrothermal treatment of various precursors, there have been proposed new methods of disaggregation by introducing ammonium citrate or oxalate or microcrystalline cellulose into the suspension or by bubbling CO2 through it. Subsequent

Abstract In chiral gold nanotubes, alternating electric current generates an electromagnetic field; under these conditions, the nanotubes become emitting solenoid nanoantennas. With the use of the Maxwell equations and taking into account the geometry of nanotubes, their band structure, and the ballistic model of electron transfer, we have calculated the alternating axial magnetic and azimuthal electric

Abstract A confined region of solid solution exists in BaS−In2S3 system of eutectic type with incongruent melting compounds of BaIn2S4 and Ba2In2S5 composition based on the α modification of In2S3. Compounds BaIn2S4 and Ba2In2S5 melt incongruently at 1330 and 1497 K, crystallize in rhombic syngony with unit cell parameters а = 2.181 nm, b = 2.165 nm, с = 1.311 nm (space group Fddd) and а = 1.317 nm

Abstract The review addresses methods for the synthesis of metal complexes of crown-substituted porphyrins; structural features of these compounds; and the influence of metal cations on the luminescence and other photophysical properties of metal crown-porphyrin complexes. Thermochromic, fluorescence, and phosphorescence properties of metal crown-porphyrins are analyzed; the applicability of these

Abstract A novel synthetic approach is proposed to the production of macroporous magnetic iron oxides and their iron aluminate composites for liquid-phase catalytic oxidation. The materials were prepared by sol–gel synthesis where metal precursors were mixed with a colloidal template solution based on siloxane–acrylate latex. The pore structure and magnetic properties of the composites were studied

Abstract Sorption properties of a composite based on microcrystalline cellulose and nanosized aluminum oxide film immobilized on its surface in removal of fluoride ions from water are studied. The optimal thickness of the sorbent layer at which the maximum sorption of fluoride ions occurs is 50 nm. The effects of various parameters, such as the solution pH and sorption time, on sorption are studied

Abstract In this study, we have investigated the interaction between Al12N12 nano-cluster and titanocene dichloride anticancer drug complex using B3P86 functional. Two interactions modes between Al12N12 nano-cluster and titanocene dichloride complex (TiCl2Cp2, Cp = η5-(C5H5)2) have been studied. The bonding interaction between the Al12N12 nano-cluster and anticancer drug has been examined through energy

Abstract Phase equilibria in the FeSe–Ga2Se3–In2Se3 system were studied by differential thermal analysis and X-ray powder diffraction analysis. A number of polythermal sections, the isothermal section at 1000 K, and the projection of the liquidus surface of the phase diagram were constructed. It was determined that this system is quasi-ternary, and that the liquidus surface comprises the fields of

Abstract The nucleophilic addition of the monocarbonyl derivative of the closo-dodecaborate anion [B12H11CO]– with N- and O-nucleophiles has been studied. This process proceeds under mild conditions in high yield. Not only primary and secondary amines but also tertiary ones can be added. The resulting borylated derivatives are thermally unstable, and the C–O and C–N bonds split upon heating forming

Abstract The principal objective of this study is to evaluate the protective effect of cysteamine (Cym) against oxidation by chelating with metal cations. Cym–Zn complex has been prepared through a simple procedure using Cym ⋅ HCl and ZnSO4. The results have shown that the chelating efficiency of zinc is better when the molar ratio of the reactant Cym · HCl to zinc ions is 1.4–1.5. IR spectra of as-synthesized

Abstract The product of the reaction between tetraphenylbismuth chloride Ph4BiCl (I) synthesized via the dephenylation of pentaphenylbismuth with hydrochloric acid and potassium hexabromoplatinate (2 : 1 mol/mol) in water after recrystallization from dimethylsulfoxide is О-dimethylsulfoxydotetraphenylbismuth S-dimethylsulfoxidotribromoplatinate [Ph4BiDMSO-O][PtBr3DMSO-S] (II). Recrystallization of

Abstract Phase formation in the series of Bi3Nd2Fe1 + yTi3 – 2yNbyO15 and Bi3Tb2Fe1 + yTi3 – 2yNbyO15 (y = 0.0–0.6 and Δy = 0.2) samples is studied. When Bi3Nd2Fe1 + yTi3 – 2yNbyO15 solid solutions (ss) are doped with niobium(V) ions, the formation of Bi3Nd2FeTi3O15 layered perovskite, a member of the Aurivillius phase family of general formula Am – 1Bi2BmO3m + 3 (m = 4), is not dominant in samples

Abstract The relationship between the dielectric and radio brightness characteristics of aqueous solutions of (NH4)2[PdCl4] at low concentrations at 298.15 K were considered. The dielectric relaxation parameters representing the disturbance of the H-bond network in the transition from water to solution were calculated from experimental data on the complex permittivity near the maximum of dispersion

Abstract The Tl–Er–Te ternary system was studied in the Tl2Te–Tl2Te3–TlErTe2 composition region by the emf method and X-ray powder diffractions analysis. The partial thermodynamic functions of ErTe and Er in alloys were determined from the emf measurements. Using the constructed diagram of solid-phase equilibria, the potential-forming reactions responsible for the above partial molar quantities were

Abstract New xylatogermanates with the same homogermanate complex anion and various phenanthrolinecopper(II) cations, namely, [Cu(Phen)3]2[(OH)2Ge2(µ-HXylar)4Ge2(µ-OH)2] · 8H2O (I), [Cu(H2O)(Phen)2]2[(OH)2Ge2(µ-HXylar)4Ge2(µ-OH)2] · 8H2O (II), and [CuCl(Phen)2]4[(OH)2Ge2(µ-HXylar)4Ge2(µ-OH)2] · 8H2O (III), have been synthesized by the developed method and studied by IR spectroscopy and thermogravimetry

Abstract Vaporization in the Li2O–Ta2O5 system is studied using the Knudsen effusion method in combination with mass-spectrometric analysis of the gas phase in the temperature range of 1570–1860 K. Saturated vapor above the system is found to consist of lithium atoms, oxygen molecules, and lithium oxide Li2O molecules over the entire range of condensed phase compositions. The absolute partial pressures

Abstract Electronic structures of four pyrene-derived N-heterocyclic carbene complexes of platinum(II) and gold(III) bearing cyclometallated 2,6-diphenylpyridine have been investigated theoretically. The structures of all complexes in gas phase have been first optimized. Different functionals and basis sets have been tested to find the best theoretical method. The results show that B3PW91 (LANL2DZ/6-31G*)

Abstract Nanocrystalline iridium coatings on hafnium carbide and tantalum carbide substrates are prepared by chemical vapor deposition (MOCVD) at 600°С. Subsequent high-temperature treatment at 1100°С gives rise to chemical reactions between iridium and hafnium carbide or tantalum carbide to yield nanosized substitutional intermetallic solid solutions MIr3 – x and evolve free carbon. The occurrence

Abstract New iron(II) complexes with 2,6-bis(benzimidazol-2-yl)pyridine (L) and closo-borate(2–) anions—[FeL2][B10H10] ⋅ 2H2O and [FeL2][B12H12] ⋅ H2O—have been synthesized. The complexes have been characterized by static magnetic susceptibility measurements, electronic (diffuse reflectance spectra), IR, and EXAFS spectroscopy, and X-ray diffraction analysis. A study of the μeff(T) dependence in the

Abstract The interaction in the Sb2Te3–InSe system was studied and the T–x phase diagram was constructed by integrated methods of physicochemical analysis (differential thermal, X-ray powder diffraction, and microstructural analyses) and also by microhardness and density measurements. It was found that the Sb2Se3–InSe system is a quasi-binary section of the ternary reciprocal system Sb,In||Se,Te. In

Abstract The conversion of gibbsite to boehmite via hydrothermal treatment at 200°С in 1.5 wt % HCl is studied by X-ray powder diffraction, IR spectroscopy, Brunauer–Emmett–Teller analysis, scanning (SEM) and transmission (TEM) electron microscopy. The steps of the process are identified. Gibbsite is split in an acidic medium, with its specific surface area increasing up to 150 m2/g, into thin lamellas

Abstract It has been found that the isomorphic capacity of the Zn2 – 2xNi2xSiO4 solid solution with a willemite structure is 15 mol % Ni. The unit cell parameters of Zn2 – 2xNi2xSiO4 samples in the homogeneity range of the solid solution are nearly independent of the content of dopant х and are close to those of undoped Zn2SiO4. It has been shown that the melting point of Zn2 – 2xNi2xSiO4 decreases

Abstract Comparative analysis have shown that the thermolysis of complex salt [Pt(NH3)4]CrO4 in synthetic air atmosphere under in situ and ex situ conditions proceeds in different routes. In contrast to in situ experiment, ex situ decomposition leads to formation of intermediate PtCrO2 phase with delafossite structure. Final decomposition product is a homogeneous mixture of platinum metal and chromium(III)

Abstract The interaction of the monocarbonyl derivative of the closo-decaborate anion [2-B10H9CO]– with O-nucleophiles has been considered. It has been found that primary, secondary, and tertiary alcohols can enter the addition reaction. It has been shown that the C–O bond is extremely labile in the obtained closo-borate derivatives of the general formula [2-B10H9COOR]2–, and upon heating, its cleavage

Abstract The mechanism of the azeotropy phenomenon has been established at a molecular level for the first time on the example of the HCOOH–H2O system, which has an azeotropic region. The studies are based on the regularities of the formation of heteroassociates with strong hydrogen bonds in binary systems and on the assumption that both phases of a boiling azeotropic mixture are composed of the same

Abstract— Two novel copper(II) polynuclear complexes with deprotonated 4-iodopyrazole (Ipz) of composition [Cu3(µ3-OH)(µ-Ipz)3Cl2 · 2CH3CN]2 (1) and [Cu3(µ3-OH)(µ-Ipz)3Br2]n (2) have been synthesized and isolated in crystalline state. Crystal and molecular structure of both compounds has been studied by single crystal X-ray diffraction. The structure of complex 1 consists of dimerized 9-azametallacrown-3

Abstract― Ultra-high-temperature ceramic (UHTC) materials with a density of 94.5 ± 1.3% have been manufactured by hot pressing a (HfB2–30 vol % SiC)–5 vol % Y3Al5O12 composite powder, which has been prepared sol–gel method, at a moderate temperature of 1850°C (holding time, 30 min; pressure, 30 MPa). The oxidation resistance of this ceramic has been studied at elevated temperatures under the effect

Abstract— The ability to extend the apical substituents at a macrobicyclic tris-glyoximate framework using a palladium-catalyzed Suzuki–Miyaura C–C-cross-coupling was tested. The reaction of an iron(II) diiodoclathrochelate with phenylboronic acid was successfully performed in toluene using the catalytic system Pd(CH3COO)2/SPhos and CsF as inorganic base. The reflux at 110°C gave a macrobicyclic iron(II)

Abstract— The most important chemical and physical properties of Al, Ga, In, and Tl, as well as the basic aspects of their inorganic chemistry are summarized in this review. Special attention is given to the formation of stable and unusual 4-membered chelate rings in compounds of these metals. The current status of structural coordination and organometallic chemistry of main group III metals in oxidation

Abstract Pd/CNT, Pt/CNT, and Pd–Pt/CNT composites having various metal contents were prepared via ammoniate thermolysis under autoclave conditions at 180°С, and were characterized. The morphology of the thus-manufactured items was comprehensively studied by scanning electron microscopy (SEM). Metallic palladium had particles sizes in the range within 20−120 nm, and platinum in the range within 20−150

Abstract Methods for the synthesis of radiopaque tantalum-containing glass and glass-ceramics by doping 45S5 bioglass with tantalum oxide are presented. Bioactive glass has been obtained by pyrolysis of a mixture of organic precursors: tetraethoxysilane, tributyl phosphate, sodium oleate, and calcium oleate. Bioglass has been doped with tantalum oxide by three different methods. The mechanism of suppression

Abstract— Two synthetic approaches for obtaining of zirconium and hafnium dihydroxophthalocyaninates (i.e. (a) that using the zirconium and hafnium alkoxides as the reactive precursors and (b) hydrolysis of zirconium and hafnium dichloridophthalocyaninates) were evaluated. Reactivity of zirconium and hafnium dihydroxophthalocyaninates in their exchange reactions with β-diketones and with decanoic acid

Abstract The thermal properties of [{Zn(H2O)3(PdOx2)}2(μ-H2O)2] · 4H2O and {(μ-Ox)Pd(μ-Ox)Mn(H2O)3}n · nH2O have been studied in various atmospheres. Zinc forms the intermetallide ZnPd in inert (He) and reductive (H2) atmospheres and a ZnO–PdO oxide mixture in an oxidative (air) atmosphere. Manganese forms MnO–Pd mixtures in an inert atmosphere, experiences deeper oxidation to Mn3O4 in an oxidative

Abstract— The title complex is formed in a quantitative yield in diluted solutions and the kinetics of its template synthesis and its acidic decomposition were photometricaly studied. The effective synthesis rate constants were determined as the pseudo-first-order rate constants with respect to the concentration of Fe2+ ions. The orders with respect to those of nioxime, CH3B(OH)2 and H+ ions are equal

Abstract A method for measurement of low-molecular weight compounds adsorption from solutions in liquefied gases and supercritical fluids based on the online coupling of high-pressure autoclave and supercritical fluid chromatograph has been proposed and tested. This method has been shown to be applicable to determine sorption capacity and to plot isotherms for adsorption of low-molecular weight compounds

Abstract Precursor CaCu3Ti4O12 has been obtained using solution method in acetic acid medium, it was annealed at 100, 200, 400, 600 800, and 1100°C. Sintered powders have been studied by physicochemical methods of analysis. According to X-ray powder diffraction, completely formed crystal structure CaCu3Ti4O12 exists at 1100°C, the particle size of the prepared powder is 1–10 µm. Thermal analysis with

Abstract A study was made of the thermal interaction in the system [Pt(NH3)4]Cl2–(NH4)10[H2W12O42] (Pt : W = 1 : 2) in an argon atmosphere, which begins at a temperature above 200°C, occurs through a number of successive steps, and ends at 450°C. The intermediate products formed in the solid and gas phases were investigated by thermogravimetric analysis, differential thermal analysis, mass spectrometry

Abstract It is for the first time that silver sulfide colloidal solutions were prepared by chemical deposition from silver nitrate and sodium sulfide solutions in heavy water D2O. Sodium citrate served as the stabilizer. The sizes of Ag2S nanoparticles in colloidal solutions were assessed by dynamic light scattering (DLS) measurements and electron microscopy. The silver sulfide nanoparticles in heavy

Abstract— CD testing of a supramolecular binding of three constitutional isomers (ortho-, meta-, and para-substituted) of an inherently CD-silent monomethinemonocarboxyphenylsulfide iron(II) clathrochelate to globular proteins (serum albumins BSA and HSA, lysozyme and β-lactoglobulin) was performed. This type of isomerism is found to strongly affect an induced CD-activity of these clathrochelates upon