The electronic structure of mono- and binuclear platinum complexes with N-phenyl-o benzosemiquinondiimine ligands was studied using X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and the density functional theory. The oxidation state of the central platinum ion corresponds to that of Pt(II). Upon the transition from the trans-complex 1 to the cis-complex 2 and to the binuclear complex 3, the electron density on platinum and nitrogen atoms decreases thus testifying the participation of platinum and nitrogen atoms in the oxidation processes and in the formation of binuclear complex 3.

Методами рентгеновской фотоэлектронной спектроскопии, рентгеновской спектроскопии поглощения и теории функционала плотности изучено электронное строение моно- и биядерных комплексов платины с N-фенил-о-бензосемихинондииминовыми лигандами. Показано, что степень окисления центрального иона платины соответствует Pt(II). При переходе от транс-комплекса 1 к цис-комплексу 2 и биядерному комплексу 3 происходит уменьшение электронной плотности на ионах платины и атомах азота, что свидетельствует об участии в процессах окисления и образования биядерного комплекса 3 (атомов азота и ионов платины).

We have studied the magnetic properties of Cd1 –xFexCr2S4 solid solutions in the FeCr2S4–CdCr2S4 system in the range 0.6 ≤ x < 1. Measurements were made in the temperature range 5–300 K in static (≤7960 A/m) and ac (10, 100, and 1000 Hz) magnetic fields of 79.60 A/m peak. All of the materials have been shown to exhibit low-temperature magnetic anomalies due to the effect of orbital ordering in FeCr2S4, a basic component, at 10 K.

The isobaric heat capacities of two monoclinic (M' and M) modifications of yttrium orthotantalate at temperatures 5–1300 K have been measured by the adiabatic and differential scanning calorimetry methods. It has been demonstrated that the difference in structure between the crystal lattices of M' and M has small effect in the heat capacity, and the difference between the heat capacities of these phases Cp(M)-Cp(M') is small, always positive, and increases in the range of the lowest temperatures. The unit cell parameters of M-YTaO4 have been determined as a function of temperature in the range 300–1173 K.

Infrared heating was used to synthesize FeCoNi/С nanocomposites, where nanoparticles of FeCoNi ternary alloy are stabilized and uniformly distributed in the carbon matrix volume. The authors studied the impact of synthesis temperature and percentage ratio of metals upon the structure, composition and electromagnetic properties. X-ray phase analysis and Mössbauer spectroscopy showed that ternary alloy nanoparticles with different compositions and crystalline lattice types can be formed with the rise in synthesis temperature and iron concentration. Resonator method was used to examine frequency dependencies of relative complex dielectric and magnetic permeabilities of nanocomposites in the range of 3–12 GHz. Calculation of reflection coefficient based on experimental permeability data showed that by varying synthesis temperature and percentage ratio of metals one can control the frequency range of effective absorption of electromagnetic waves. It was established that increase in relative iron content from 33 to 50 rel.% leads to the shift of minimal electromagnetic wave reflection coefficient band from f ~ 12+ GHz to frequency f ~ 6 GHz at identical absorber thickness.

A combined procedure of zinc peroxide granulation and encapsulation in one technological stage has been developed, which ensures the stabilization of ZnO 2 by forming a coating on the surface of the product granules. It is shown that the use of sodium polyphosphate in a combined process of granulation and encapsulation as encapsulating agents with the concentration in the initial solution of 1% allows obtaining a capsular product, which is significantly more resistant to the action of wet carbon dioxide than a nonencapsulated analogue.

The current status of research into the thermal behavior of heterometallic 3d–4f carboxylates that are suitable candidates for single-source precursors of mixed oxides was considered. Emphasis was placed on the thermal stability and conditions of conversion of complexes to mixed oxides. The influence of the composition and nature of the precursor on the composition and properties of the resulting mixed oxides was demonstrated.

N -Alkyl 4,4'-bipyridylium salts were synthesized and characterized. Cyclic voltammetry investigation showed that monosubstited 4,4'-bipyridylium salts are prone to reversible single-electron reduction. The formal redox potentials vs. a saturated silver chloride electrode were determined for different potential sweep rates. High-resolution ESR spectra of the radical cations formed upon the reduction of N-substituted 4,4'- bipyridylium salts in acid media were measured and interpreted. The substituent structure and the type of anion in the molecule have a considerable effect on the spin density distribution, current–voltage characteristics, and elctrooptical properties. The applicability of monosubstituted 4,4'-bipyridylium salts as photoelectrochromic compounds was studied.

The magnetization of CuCr2–xSb x S4 solid solutions has been measured as a function of temperature between 300 and 5 K in a weak (3980 A/m) and a strong (7960 A/m) magnetic field. We have identified the type and character of the magnetic transformations observed in the system and determined the temperature and composition limits of the stability regions of the magnetically active phases involved and the cation and valence distributions in them. A magnetic phase diagram of the synthesized materials has been mapped out, where the largest area (0 < x < 0.23) after the paramagnetic region is occupied by solid solutions based on the CuCr2S4 ferromagnet. In the composition range (0.23 < x < 0.40) adjacent to the infinite clusters—CuCr2S4 ferromagnet and CuCr1.5Sb0.5S4 antiferromagnet—the phase diagram contains medium and small finite ferro- and antiferromagnetic clusters forming a short-range magnetic order or spin glass. The compositions based on the CuCr1.5Sb0.5S4 antiferromagnet lie in the composition range 0.4 < x < 0.5.

The reactions of DyX3 · 6H2O (X = NCS, Cl) with 2,2':6',2''-terpyridine (Terpy) and K3Fe(CN)6 in aqueous-alcohol solutions afford cyano-bridged ensembles [Dy(Terpy)(H2O)3Fe(CN)6] · nH2O, [Dy2(Terpy)2(H2O)3(CO3)(NCS)Fe(CN)6] · 4H2O, and [Dy2(Terpy)2(H2O)4(CO3)(NCS)Fe(CN)6] · 11.4H2O. The compounds obtained are identified by the data of elemental analysis, IR spectroscopy, X-ray diffraction analysis, and X-ray structure analysis (CIF files CCDC nos. 1827138–1827140). The study of the magnetic properties of complex [Dy(Terpy)(H2O)3Fe(CN)6] · nH2O shows the low-spin state of Fe3+. The dynamic magnetic behavior of this complex exhibits a slow magnetic relaxation.

The magnetic properties of CoCr2S4–Cu0.5In0.5Cr2S4 solid solutions have been studied in the temperature range 5–300 K at different ac magnetic field frequencies (100, 500, and 1000 Hz) and an amplitude of 79.6 A/m. We have determined the temperatures of the magnetic transformations in the system, identified their nature, and constructed the magnetic phase diagram of the solid solutions.

Solvate polymorphs of [Dy(acac) 3 (H 2 O) 2 ] · Thf, [Ln(acac) 3 (H 2 O) 2 ] · H 2 O · EtOH (Ln = Eu, Dy) and [Dy(acac) 3 (H 2 O) 2 ] · 1.5MeOH, which belongs to a new structural type, are isolated as single crystals. The structures of the prepared compounds are determined by X-ray crystallography, and the effect of solvate molecules on their crystal structures is discussed.

The magnetic properties of (Cu0.5In0.5)1 – xFexCr2S4 (x = 0–0.3) solid solutions between the FeCr2S4 ferrimagnet (TC = 170 K) and Cu0.5In0.5Cr2S4 antiferromagnet (TN = 28 K) have been studied in the temperature range 5–300 K using static and dynamic magnetization measurements. The results are interpreted in terms of cluster models for the formation of new magnetically active phases.

Using experimental data, we have constructed a magnetic phase diagram of Co x Zn 1– x Cr 2 S 4 spinel solid solutions. According to the phase diagram, the Co x Zn 1– x Cr 2 S 4 system has four magnetically active regions: paramagnetic, ferrimagnetic, antiferromagnetic, and spin glass. The CoCr 2 S 4 -based ferrimagnetic thiochromite solid solutions exist in the widest composition range (not counting the paramagnetic region): 0.31 ≤ x < 1.0. Lowering the temperature leads to a reentrant and a spin-glass transition of these materials. The next in area is a metastable region: 0.12 ≤ x ≤ 0.31. In this composition range, a pure spin glass transition occurs from the paramagnetic region. ZnCr 2 S 4 -based antiferromagnetic thiochromite materials exist in the narrowest composition range: 0 ≤ x ≤ 0.12.