The milling of molybdenite under cryogenic conditions in argon has been performed for the first time, and the physicochemical properties of its samples, their catalytic activity in model reactions of hydrodesulfurization of dibenzothiophene and diesel components, and the ability to initiate the isopropylbenzene oxidation reaction have been studied. The samples have been found to exhibit high catalytic activity.

The paper deals with the solid-phase method for producing bulk two-component sulphide catalysts by the mechanochemical coupling of commercial molybdenum, cobalt, and nickel powders. The research presents physicochemical properties of the catalysts and discusses the activity of the latter in model reactions of dibenzothiophene and 4,6-dimethyldibenzothiophene hydrodesulphurisation including the latter in the presence of carbazole and phenanthrene, and also upon the hydrotreatment of sulphur components in diesel fraction.

The process of regeneration of used Shell Tellus T-32 hydraulic oil is studied for selection of adsorbents and purification methods. A combined purification method is proposed: contact purification at room temperature for 10 h using a carbamide-modified basalt fiber, followed by percolation purification using unmodified basalt fiber as the adsorbent. After the percolation purification, the oil can be purified further on a filter having three layers: polypropylene fiber, spherical cinder, and iron oxyhydroxide in a 1.65:1 ratio, and polypropylene fiber.

Spectral-luminescent properties of γ-pyrilocyanines and their heteroanalogs with modified complex anions have been studied. It was shown that the fluorescence quantum yield in the series pyrilo-, thiapyrilo-, and selenopyrilocyanine decreased for mono-and trimethinecyanines as well as through substitution of TlCl 4 − for ClO 4 − . This is likely due to the increased probability of singlet-triplet transfers under the influence of heavy atoms.

To study reactivity of copper nanopowders obtained by conductor electroblast and mechanical treatment three test reactions have been proposed: interaction with glacial acetic acid with basic copper acetate formation, interaction with acetylacetone with copper acetylacetone formation and interaction with tetraphenylporphin with formation of copper tetraphenylporphin. Copper nanopowder reactivity was judged by a value of reaction thermal effect which was determined by microcalorimetric method. It was shown that copper nanopowder reactivity depends on a method and conditions of obtaining nanopowders: on medium in which conductor electroblast occurs, duration of mechanical treatment and type of admixture with which copper powder is treated.

Catalytic oxidation of cumene by molecular oxygen with tetraphenylporphins Co, Cu, Zn, In, Sn, Al has been studied. It was shown that tetraphenylporphines Co, Cu and Zn are very active catalysts as they catalyze decay of cumene hydro peroxide in addition to oxygen activation. Tetraphenylporphins In, Sn, Al are less active in this reaction as they do not catalyze hydro peroxide decay. It was found that catalytic activity of metal tetraphenylporphins changes slope oppositely to their potentials of electrochemical oxidation except tetraphenylporphin Cu.

Potentials of the reduction of gamma-pyrilocyanines, their heteroanalogues, and flavilium dyes on a mercury film electrode and potentials of their oxidation on a glassy-carbon electrode in nonaqueous media are obtained for the first time ever by a voltammetry method. It is shown that the oxidation and reduction potentials depend on the dye molecule structure, in particular, on the nature of the heteroatom in the heterocycle. It is established that the ClO 4 − anion and complex anions InCl 4 − and TlCl 4 − , which enter the composition of cationic flavilium dyes, undergo neither reduction nor oxidation in the potential region studied.

The interactions between triphenylmethane dyes and triple complex of triphenylmethane dye and poly-N-epoxypropylcarbozole have been investigated by means of NMR-spectroscopy method. It is shown that polymer organic semiconductor and dye interact in the ground state forming weak complexes with charge transfer.

The oxidation of tritane dyes at a stationary glassy carbon electrode in methylene chloride is studied using voltammetry. It is shown that electron-donor-type dialkylamino-groups in the dye molecules favor the decreasing of the oxidation half-wave potentials; by contrast, the strong electron-acceptor-type nitroso-group contributes to their increasing. The Cl − anion and complex anion In Cl 4 − , which are constituents of triphenylmethane dyes, are not oxidized in these conditions.

Spectral-luminescent properties of г-pyrilocyanines and their heteroanalogues with modified complex anions have been studied. It is shown that there is a decrease of quantum fluorescent yields along with pyrilo-, thiapyrilo-, selenpyrilofor monoand trimethinecyanines and at replacement of anion dye molecule ClO4 into anion TlCl4 as a result of increasing the probability of singlet-triplet transition under the influence of heavy atoms.

Spectral sensitization of photoconductivity of poly(N-epoxypropylcarbazole) and benzaldehyde diphenylhydrazones by chlorides and ternary complexes of triphenylmethane dyes was studied. It was shown that an increase in the sensitization activity of a triphenylmethane dye upon replacement of chloride anion in its molecule with a complex anion containing metal was due to a change in the electron-acceptor ability of the dye molecule.

The reactivity of copper nanopowders obtained by mechanical treatment or electric explosion of a conductor was studied in their reaction with glacial acetic acid. Two parameters were used to evaluate the reactivity: heat effect of the reaction and the maximum rate of heat release.

Quantum-chemical calculations were performed to estimate the ionization potentials of benzaldehyde diphenylhydrazones and determine the character of conjugation in hydrazone molecules. The half-wave oxidation potentials of benzaldehyde diphenylhydrazones and their dependence on the nature of the substituent in the benzaldehyde ring of the hydrazone molecule were studied by voltammetry with a glassy-carbon electrode. The results were used to interpret the experimental properties of benzaldehyde diphenylhydrazones as compounds transporting positive charge carriers.

A combined (injection/spectral) sensitization study of poly-N-epoxypropylcarbazole (PEPC) with amorphous selenium and complexes of pyrylium dyes has been carried cut. It has been shown that combined sensitization proceeds simultaneously by two mechanisms of charge carriers photogeneration the generation in the selenium layer with subsequent injection of charge carries into the transport layer and the generation in the bulk of the transport on the dye.

A combined (injection/spectral) sensitization study of diphenilhidrazones has been carried out. It has been shown that two mechanisms of the charge carriers photogeneration proceeds: viz the generation in the selenium layer with subsequent injection of charge carriers into the transport layer and the generation in the bulk of the transport layer. These mechanisms are complementary and have also effect on one another. It is manifested in a different pattern of light discharge observed at different wavelengths.