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Russian Journal of Inorganic Chemistry

Current research reports and chronological list of recent articles..




The scientific Russian Journal of Inorganic Chemistry - Zhurnal Neorganicheskoi Khimii - covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, high-temperature semiconductors, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, and physical chemistry of solutions.

The publisher is Springer. The copyright and publishing rights of specialized products listed below are in this publishing house. This is also responsible for the content shown.

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Additional research articles in the field of inorganic chemistry, see Current Chemistry Research Articles. Magazines with similar content:

 - Dalton Transactions,

 - European Journal of Inorganic Chemistry,

 - Inorganic Chemistry,

 - Inorganic Chemistry Communications,

 - Inorganica Chimica Acta.



Russian Journal of Inorganic Chemistry - Abstracts



Effect of Ce3+ on the Luminescence Properties of SrAl2O4:Eu2+, Dy3+ Persistent Phosphors for Alternating Current Driven Light-Emitting Diodes

Abstract

SrAl2O4:Eu2+, Dy3+ has been widely studied as a classical persistent phosphor due to its stability and long green-afterglow duration. In this study, a series of Ce3+ co-doped SrAl2O4:Eu2+, Dy3+ phosphors were prepared by the traditional solid state reaction method, sintering under Ar + 5% H2 atmosphere in the temperature range of 1300–1500°C. The effect of Ce3+ co-doping on luminescence performance of SrAl2O4:Eu2+, Dy3+ was investigated at Ce3+ concentration of 0, 0.2, 0.3 at %. Under excitation wavelengths of 365, 400 and 460 nm, respectively, the luminescence intensity was found to increase linearly with rise of sintering temperature or Ce3+ doping concentrations. It was ascribed to the sufficient crystallization at high sintering temperature as well as the high absorption cross section of Ce3+ ion. Besides, the Ce3+ co-doping speeds up the afterglow time without introducing the emission wavelength shift. Therefore, Ce3+ co-doped SrAl2O4: Eu, Dy is a promising high efficient phosphor for compensated the dark period in alternating current driven light-emitting diodes (AC-LED) lighting.


Datum: 29.06.2022


Synthesis, Structure, and Phase Composition of High-Entropy Ceramics (HfTiCN)-TiB2

Abstract

The phase composition and structure of the composite ceramic material (HfTiCN)-TiB2 obtained from the high-entropy system Hf–Ti–C–N–B in the mode of conjugated self-propagating high-temperature synthesis (SHS, combustion) has been studied. Quantification using the Rietveld method has shown that the content of the HfTiCN phase in the combustion products is 40 wt %, and the content of the TiB2 phase is 60 wt %. It has been established that the structure of SHS materials consists of HfTiCN particles and agglomerates, which are distributed in the TiB2 matrix. The average particle size of TiB2 and HfTiCN is 6.1 and 3.3 µm, respectively. A probable mechanism for the formation of a composite material (HfTiCN)-TiB2 in the mode of coupled self-propagating high-temperature synthesis of the Hf–Ti–C–N–B system is proposed. The results presented indicate the fundamental possibility of obtaining a composite ceramic material (HfTiCN)-TiB2 by the method of self-propagating high-temperature synthesis.


Datum: 13.06.2022


Fabrication of BaZr0.80Y0.20O3 – δ Sputtering Target for Thin-Film Proton Conducting Oxides

Abstract

A systematic work was carried out to fabricate a phase-pure sputter target for thin film deposition of BaZr0.80Y0.20O3 – δ. The current study mainly involves two parts; i.e. determination of the ideal parameters for phase-pure BaZr0.80Y0.20O3 – δ synthesis, and the production of sputter target with a 2-inch diameter using deformable compaction die. For the synthesis, the effect of chelating and polymerization agents on the Pechini synthesis of BaZr0.80Y0.20O3 – δ was investigated in detail. Ethylenediaminetetraacetic acid and citric acid as chelating agents were employed with different fractions, while ethylene glycol was preferred as a polymerization agent. The effect of calcination temperature ranging between 1000 and 1200°C was also investigated so as to eliminate the secondary phase formation. Subsequent to powder synthesis, the BaZr0.80Y0.20O3 – δ sputter target having over 90% of its theoretical density was produced following powder pressing using deformable compaction die up to 150 MPa and sintering at 1500°C for 10 hours. BaZr0.80Y0.20O3 – δ sputter target produced was then tested for a thin film deposition in a magnetron sputtering system for 12 h. Investigations carried out on the thin films deposited revealed that fully dense and highly textured crystalline BaZr0.80Y0.20O3 – δ films could be deposited with the target produced in the study.


Datum: 13.06.2022


One-Pot Sol-Gel Synthesis of Doped TiO2 Nanostructures for Photocatalytic Dye Decoloration

Abstract

In this work, a series of TiO2 nanostructures doped with well-selected transition metals (Cr, Fe, Co and Zr) was prepared using a simple “one-pot” sol-gel process, followed by a drying under supercritical conditions of solvent. Herein, we carefully highlighted the effect of doping with ions exhibiting higher size than that of Ti4+ host ion, on physicochemical properties of TiO2 aerogel nanomaterials, and its photocatalytic behavior in the methylene blue degradation under solar light irradiation. Textural properties revealed materials with high surface areas given by supercritical drying process. TEM analysis of pristine oxide showed quantum-sized, well-dispersed and highly ordered particles. XRD analysis evidenced an increase in anatase lattice volume after doping. A reduction in gap energy can be seen for Cr, Fe and Co doped TiO2 samples, which is related to the involvement of intermediate energy levels related to dopant ions. Photocatalytic activity of TiO2 solid shows an apparent improvement when doped with zirconium compared to other doped TiO2 materials and pristine oxide, which may be mainly correlated to the increase in the amount of oxygen defects given its larger size as shown by PL spectroscopy. Oxygen vacancies act as electron traps thus provide a charge separation enhancing the photoactivity. The low photoactivity of Cr–TiO2, Fe–TiO2, and Co–TiO2 materials was mainly related to the dopant energy levels appearing as charge recombination centers, which can negatively affect the catalytic efficiency. Hence, the efficiency of photocatalysis seems determined by the competition between these two process; charge separation and charge recombination.


Datum: 13.06.2022


Radiation-Chemical Transformations of 7-NH3-4-CH3-Coumarin Decahydro-closo-Decaborate as a Potential Inhibitor of Free Radicals

Abstract

Compound (7-NH3-L)2[B10H10] has been prepared and identified by elemental analysis and IR and UV spectroscopies. This compound as a potential inhibitor of free radicals and contains a representative of coumarins possessing biological activity and a representative of boron cluster anions widely used in various fields of science and technology. The radiation-chemical transformations of 7-amino-4-methylcoumarin in CH3CN, 96% C2H5OH, in the CH3CN/CF3COOH system, and in 20% aqueous solution (H3O)2[B10H10] have been first studied by UV spectroscopy.


Datum: 13.06.2022


Dynamics of Thermal Decomposition of the Double Complex Salt [Cr(ur)6][Co(CN)6]⋅4Н2О

Abstract

Information on the thermal decomposition of the double complex salt (DCS) [Cr(ur)6][Co(CN)6]⋅4Н2О (ur is urea CO(NH2)2) in the temperature range of 30–1000°C has been presented. The thermolysis of the studied DCS has been carried out in an argon atmosphere at three heating rates (5, 10, 20°C/min). The obtained TG data have been processed using the ARKS TA, and then the kinetics has been evaluated by the ARKS FK program from data for 5 and 10°C/min. The proposed multi-stage formal kinetic model provided a good fit of experimental data and showed a very reasonable prediction of decomposition at a rate of 20°C/min. It was demonstrated the formation of cyanobridge structures during thermolysis. A metastable compound Co3Cr was found in the product of thermolysis at 550°C. The mixture of the final products of calcination has been comprised Co0 (α-face-centered cubic lattice (fcc), β-fcc), Cr2O3, Cr7C3, Cr23C6, Cr21.26Co1.74C6.


Datum: 13.06.2022


Synthesis of Nickel Precursors Derived from 1,1'-Bis(Diphenylchalcogenophosphoryl)Ferrocene Analogue and Their Catalytic Oxidation Reaction Studies

Abstract

Two equivalents of sulphur and selenium on reaction with 1,1'-bis(diphenylphosphino)ferrocene (dppf) resulted compound of composition [Fe{C5H4P(E)Ph2}2] (E = S, Se). The latter resulted phosphine derivative on reaction with NiCl2·6H2O afforded an additive product [NiCl2(dppfE2)] (dppf = Fe{C5H4PPh2}2; E = S, Se) which on further treatment with another equivalent of [NiCl2(dppfE2)] followed by the addition of sodium tetraphenylborate yielded a binuclear complex [Ni2(µ-Cl)2(dppfE2)](BPh4)2 (E = S, Se). All these complexes were characterized by elemental analysis, IR, 1H and 31P{1H} NMR spectroscopy. The molecular structure of [Fe{C5H4P(Se)Ph2}2] was determined by single crystal X-ray diffraction. The nanoparticles of complex [NiCl2{Fe(C5H4P(S)Ph2)2}] (1a) and [NiCl2{Fe(C5H4P(Se)Ph2)2}] (1b) was prepared through hydrothermal method. The resulting composites have further been applied for the catalytic oxidation of benzyl alcohol to aldehyde.


Datum: 13.06.2022


Synthesis, Crystal Structures, and Magnetic Studies of Two Six-Coordinate Nickel(II) Complexes with Tripodal Benzimidazole Ligands

Abstract

Herein, two nickel(II) complexes [Ni(ntb)(chdc)(CH3OH)]⋅CH3OH⋅3.5H2O (1) and [Ni2(ntb)2(btc)(CH3OH)R]⋅Cl⋅4CH3OH⋅H2O (2) (chdc is trans-1,4-cyclohexanedicarboxylate, btc is 1,3,5-benzenetricarboxylate, ntb is tris(2-benzimidazolylmethyl)amine, R = CH3OH/H2O) containing tetradentate poly-benzimidazole ligand have been synthesized and characterized by FT-IR spectroscopy, UV-Vis spectroscopy, elemental analysis, single‑crystal X‑ray diffraction, and magnetic analysis. X-ray crystallographic analysis shows that the Ni(II) ions in 1 and 2 have distorted octahedral geometries with four nitrogen atoms of ntb, one oxygen atom of carboxylate and one oxygen atom of H2O or CH3OH. Complex 1 is mononuclear with trans-1,4-cyclohexanedicarboxylate coordinated by Ni(II) in monodentate bonding fashion, and complex 2 consists of 1,3,5-benzenetricarboxylato-bridged nickel(II) centers in bis(monodentate) bonding mode. Hydrogen bonds and π–π interactions are important in stabilization of the crystal structures. The variable temperature magnetic susceptibilities of complexes 1 and 2 indicate that there are antiferromagnetic interactions.


Datum: 13.06.2022


Uranium(VI) Sorption from Liquid Waste Solution Using Functionalized Polyurethane Polymer: Kinetic and Isotherm Characterizations

Abstract

The removal of hazardous metal ions from liquid waste effluents is very important for water as well as environmental security. In this regard, this article discusses the adsorption of hexavalent uranium U(VI) from aqueous solutions onto polyether type polyurethane foam in detail (PUF). SEM and FTIR measurements were used to characterize PUF prior to and after U(VI) adsorption, and batch-type experiments were used to investigate the effect of various parameters on adsorption efficiency, including pH, metal-ion concentration, temperature, and contact time. The sorption experimental data have been described well with pseudo-second-order kinetic mathematical equations. The Langmuir isotherm model accurately described the equilibrium process which declare that the uranium sorption is monolayer and homogeneous process. The sorption capacity of conventional polyurethane foam was 26.3 mg g–1. Nitric acid (0.1 M) has been applied effectively for the desorption of U(VI) from the loaded sorbent. PUF material exhibit stable performance for five cycles of sorption/ desorption processes. The displayed results demonstrate that PUF may be used as a proper material for uranium sorption from real matrix samples.


Datum: 23.05.2022


Phase Equilibria and Physicochemical Properties of the Ternary System (LiBO2 + NaBO2 + H2O) and Quaternary system (NaBO2 + NaCl + Na2SO4 + H2O) at 323.15 K

Abstract

Solid-liquid phase equilibria of ternary system (LiBO2 + NaBO2 + H2O) and quaternary system (NaBO2 + NaCl + Na2SO4 + H2O) at 323.15 K and 0.1 MPa were determined by isothermal solution equilibrium method. The experimental results show that there are one invariant point, two univariant solubility curves and two crystallization regions in the ternary system (LiBO2 + NaBO2 + H2O). The phase region of LiBO2·2H2O is the largest, indicating that its solubility is the smallest, and no double salt and solid solution was formed in this system. In the quaternary system (NaBO2 + NaCl + Na2SO4 + H2O), there are two invariant points, five univariant solubility curves, and four crystallization regions. Among them, the crystallization region of Na2SO4 is the largest, and the double salt (NaCl·NaBO2·2H2O) is formed in the system. The physicochemical properties including refractive index, density and pH value of saturated solutions in the ternary system and quaternary system all changes regularly with the increasing of NaBO2/NaCl concentration.


Datum: 23.05.2022


Novel Synthesis and Structural Investigations of ZnSO4/MgCl2 Composite Hydrated Salt for Enhanced Thermochemical Heat Storage Applications

Abstract

Thermochemical materials MgCl2 and ZnSO4 have been investigated in depth on larger energy density, chemical stability and larger dehydration/hydration output in view of space heat application. The selection of these materials was based on a recent review on all possible salt hydrates, within the frame of a thermochemical heat storage density and considering current advances in heat storage application. ZnSO4⋅7H2O and MgCl2⋅6H2O were robust with a specific mixing ratio which upgrade materials to a new level of energy. The as-prepared composites significantly improved cyclability, heat of absorption and desorption. The study suggested that hydration/dehydration performance of Zm2 composite shows promising ability among various mixing composites ratios. The TG-DSC result highlighted that compare with pure ZnSO4 and MgCl2, heat storage performance of derived Zm2 40 and 53% increased, respectively. Moreover, among these thermochemical materials, cyclability test of Zm2 composite showed a promising result.


Datum: 23.05.2022


Synthesis and Characterization of Bi2WO6 Nanoplates Loaded with Ag/AgCl Nanoparticles on Top Used for Degradation of Rhodamine B

Abstract

Heterostructure Ag/AgCl/Bi2WO6 nanocomposites were successfully synthesized by modifying Bi2WO6 thin nanoplates loaded with Ag/AgCl nanoparticles on top for photodegradation of rhodamine B (RhB) under visible light irradiation. The as-prepared Bi2WO6 sample and heterostructure Ag/AgCl/Bi2WO6 nanocomposites were characterized by X-ray diffraction, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray photoelectron spectroscopy (XPS). The analytical results show that metallic Ag nanoparticles and AgCl nanoparticles were supported on the surface of Bi2WO6 thin nanoplates. The photocatalytic efficiencies of as-prepared samples were evaluated through the degradation of RhB under visible light irradiation. In this study, the heterostructure Ag/AgCl/Bi2WO6 nanocomposites have the photocatalytic activity higher than pure Bi2WO6 sample because of the promotion for electronic diffusion between Ag/AgCl and Bi2WO6. The photocatalytic activity of heterostructure Ag/AgCl/Bi2WO6 nanocomposites was 99.00% under visible light irradiation within 45 min.


Datum: 23.05.2022


Tuning the Electronic Properties of Carbon-Doped Double-Walled Boron Nitride Nanotubes: Density Functional Theory

Abstract

This work evaluates the effect of doping on pristine double-walled boron nitride nanotube in different doping positions. We implemented density functional theory to investigate the electronic properties of doped double-walled boron nitride nanotubes. To cover all possible doping positions, ten different doping cases were included. We noticed that the electronic properties of double-walled boron nitride nanotubes crucially depend on doping site, whether the carbon atom replaced the boron or nitrogen atom and the dopant concentration as well. In addition, doping the double-walled boron nitride nanotube creates deformation in the nanotube structure. Such structural deformation as well as inter-wall interaction directly affects the electronic properties of the nanostructure. Different band gap values were obtained in such away insulator-semiconductor phase transition as well as insulator-narrow gap semiconductor phase transition were achieved. For instance, when nitrogen atom replaced by carbon atom in inner wall the obtained band gap values was 0.338 eV, however, when boron atom replaced by carbon atom in inner wall the obtained band gap value was 2.030 eV. Such band gap variations will be suitable for different electronic applications.


Datum: 23.05.2022


Conversion of Glycine to Oxalate in Presence of CuSO4⋅5H2O and Isonicotinamide

Abstract

The reaction of CuSO4⋅5H2O with glycine and 4-cyanopyridine in aqueous alkaline medium resulted in polymeric complex [Cu(ox)2(isn)2]·(CONH2)2]n (1) (where ox is oxalate, isn is isonicotinamide). Complex 1 has been studied by single crystal X-ray diffraction. Crystal structure reveals that complex 1 is a polymeric structure bridged by oxalate ions. Glycine has been oxidized to oxalate during the course of the reaction along with the in-situ hydrolysis of 4-cyanopyridine to isonicotinamide resulting in complex 1. Complex 1 was further characterized by molar conductance, UV-Vis and FT-IR spectroscopic techniques. The conversion of glycine to oxalate occurs spontaneously in aqueous solution under ambient conditions.


Datum: 01.05.2022


Effect of the Graphitic Carbon Nitride Synthesis Atmosphere on its Activity in the Photocatalytic Generation of Hydrogen Peroxide

Abstract

Materials based on graphitic carbon nitride (g-C3N4) are intensely studied as promising photocatalysts of different reactions, hydrogen peroxide formation including. Effect of synthesis parameters of g-C3N4 obtained by thermolysis of melamine, urea, and thiourea on its composition and photocatalytic activity has been studied. The photocatalytic activity of obtained materials has been studied in the reaction of oxidative decomposition of organic dye and in oxygen reduction to form hydrogen peroxide. It has been shown that, in spite of incomplete polycondensation after thermolysis, the obtained samples display high values of photocatalytic activity. The work has shown that the photocatalytic activity of samples obtained at 550°С is by factor 2–4 higher than that for samples obtained at 500 and 600°C. It has been shown that the preparation of g-C3N4 from thiourea in air leads to photocatalyst with maximal activity, whereas melamine and urea produce the best catalyst under nitrogen atmosphere.


Datum: 01.05.2022


Hydride Intercalation of Lithium into Ni3GaTe2

Abstract

In order to expand the methods of lithium intercalation into layered multicomponent matrices, the reaction of lithium hydride with layered telluride Ni3GaTe2 through the stage of formation of mechanocomposites has been studied. Intercalation compounds LixNi3GaTe2 (0 ≤ x ≤ 0.3) have been shown to form when annealing mechanocomposites of the matrix and intercalating agent (LiH) in argon. The channels of hydride ion conversion have been studied and transformations involving the matrix have been described at various temperatures and molar ratios of the matrix and intercalating agent.


Datum: 01.05.2022


Complexes of Dioxomolybdenum(VI) with Acylhydrazones. Crystal Structures of Nicotinoylhydrazone 5-Nitrosalicylic Aldehyde (H2L) and Solvate Complex МоО2(L)·Me2SO

Abstract

Nicotinoylhydrazone 5-nitrosalicylic aldehyde (H2L) and solvate complex МоО2(L)⋅Me2SO (I) have been synthesized and their structures have been studied by IR spectroscopy and X-ray diffraction. According to X-ray diffraction data, the molybdenum atom in I has an octahedral coordination built of two cis-O2(oxo) ligands, N(L),O(Solv) atoms in trans-positions to O(oxo) and two O(L) atoms in cis-positions to O(oxo) and in trans-positions to each other. The Mo atom coordinates ligand L2– in the tridentate (2O, N) bis-chelate manner. Average bond lengths in I are: Mo–O(oxo) 1.690 Å, Mo–N(L) 2.249 Å, Mo–O(L) 1.965 Å, Mo–O(Me2SO) 2.260 Å, the O(oxo)MoO(oxo) bond angle is 105.1°. Changes in the geometric parameters of ligand L2– when passing from H2L and coordination by the Mo atom in complex I are considered. Adduct МоО2Сl2⋅2H2L (II) has been obtained, and its structure is discussed based on IR spectroscopy data.


Datum: 01.05.2022


Synthesis, Analysis and Visible-Light-Driven Photocatalysis of 0–5% Pr-Doped ZnO Nanoparticles

Abstract

Praseodymium (Pr) doped ZnO nanoparticles have been synthesized by tartaric acid assisted combustion method and followed by calcination at 600°C for 2 h. The samples have been characterized by elemental analyzer, thermogravimetric analysis, X-ray powder diffraction, FTIR spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. In this research, the loaded Pr3+ ions have been incorporated into ZnO lattice. Upon increasing the content of Pr dopant, their particle-sizes have been decreased from 72.60 ± 22.92 nm for ZnO nanoparticles to 21.59 ± 5.70 nm for 5% Pr-doped ZnO nanoparticles. The photocatalytic activities of ZnO with and without Pr dopant have been also investigated through the degradation of methylene blue (MB) under visible light irradiation. The 3% Pr-doped ZnO nanoparticles have the highest photocatalytic activity because Pr3+ ions as electron acceptors played the role in inhibiting the recombination of charge carriers. O2 radical is the main active species used for degradation of MB and 3% Pr-doped ZnO nanoparticles are the promising oxide used for wastewater treatment.


Datum: 01.05.2022


When Four Ones are Equal to Ten on the Interest Scale: ZrSiCuAs/LaOAgS Type Revisited (Review)

Abstract

With this mini review we would like to revisit one of the most exciting structure types among the inorganic quaternary compounds, ZrSiCuAs, which has also been known as LaOAgS or simply “1111,” with a goal of highlighting the latest progress in the chemistry of the relevant compounds. The last dedicated review dealing specifically with these compounds was published back in 2008, and in the past fifteen years there have been many new developments in the field. The compounds of the “1111” type are built from alternating litharge and mackinawite slabs, thus forming a layered arrangement where different layers are considered responsible for different and potentially exciting physical properties, which makes them not only interesting but also important objects for an in-depth investigation as prospective functional materials. Unfortunately, these compounds sometimes represent rather challenging objects to study or even to synthesize, which might take a lot of efforts. In this respect, it is of particular importance to have a working screening tool for the selection of potential candidates. In this light, we would like to make a particular emphasis on design and theoretical predictions of new compounds of this type using a combination of crystal chemical and quantum chemical considerations. A special part of this review is dedicated to predicting new hydrides, which reflects newly discovered interest in hydride chemistry and hydride applications.


Datum: 01.05.2022


Stability of Cobalt(II) Complexes with Glycinate Ion as a Function of Water–Dimethyl Sulfoxide Solvent Composition

Abstract

The stability constants cobalt(II) glycylglycinate complexes in a water–DMSO solvent of variable composition have been determined by the potentiometric titration method at 298 K and a solution ionic strength of 0.1 M against the background of sodium perchlorate. It has been established that an increase in the content of DMSO in solution leads to an increase in the stability of cobalt(II) glycylglycinate complexes. Using literature data, we calculated the change in the Gibbs energy of the Co2+ ion transfer from water to its mixtures with DMSO and estimated the contributions of the transsolvation of the reagents in a water–DMSO solvent to the change in the Gibbs energy of the reaction of cobalt(II) glycylglycinate formation. It has been shown that a change in the Gibbs energy of transsolvation of a metal ion in a water–DMSO solution counteracts an increase in the equilibrium constant of the complex formation reaction, while a change in the solvation state of the ligand and the complex species, on the contrary, contributes to an increase in the stability of the complex.


Datum: 01.05.2022


 


Category: Current Chemistry Research

Last update: 28.03.2018.






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