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Fine Chemical Technologies

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Vol 4, No 6 (2009)
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THEORETICAL BASES OF CHEMICAL TECHNOLOGY

3-32 112
Abstract
Ways of increasing catalytic activity of complexes of transition metals towards oxidation of alkylarenes with molecular oxygen, described in the literature within last 10-15 years, are reviewed. Attention is focused on the original method of controlling the catalytic activity of complexes of M(acac)n (M=Ni(II), Fe(II,III), Co(II)) in the oxidation reactions of alkylarene (e.g., ethylbenzene and cumol) to hydroperoxides by introducing the mono- or polydentate electron-donating ligands L2. Modeling of the catalytically active complexes of nickel as selective catalysts for ethylbenzene oxidation to α-phenylethylhydroperoxide by introducing phenol (PhOH) in the binary system {Ni(II)(acac)2+L2}, and also active complexes of nickel or iron by using quaternary ammonium salts and macrocyclic polyethers as L2, is successfully realized by the authors. The role of H-bonding in the mechanisms of the homogeneous catalysis is discussed. A strategy of controlling the catalytic activity of Fe(II,III)(acac)nL2 complexes (L2 =R4NBr or 18-crown-6 (18C6) by introducing small amounts of H2O (~10-3 mol/l) is proposed. The activity of Ni and Fe catalysts in the processes of radical chain initiation (O2 activation) and radical chain propagation (Catalyst + RO2 →) in the reactions of ethylbenzene oxidation is discussed. The bibliography includes 144 references.
33-39 69
Abstract
The article presents a study of influence of the structural characteristics of ionic liquids, such as length of alkyl chain of the cation, cation's symmetry, type of the cation, type of the anion and some others, on the homogeneous and heterogeneous characteristics of the mixtures of ionic liquids with water and alcohol.
40-44 114
Abstract
The way of increasing competitiveness of the existing domestic factories manufacturing nitrogen containing chemical fertilizers is suggested. The approach involves minimal retooling of the existing equipment which will allow production of the ammonium nitrates containing fillers (e.g., manufacturing of ASN, CAN, AC, NP, NK fertilizers) as well as manufacturing of porous ammonium nitrate (PAN).
45-51 52
Abstract
The analysis of heat transfer influence on the efficiency of separation in the countercurrent fractional crystallization process was performed. Using a binary mixture as an example, it has been demonstrated that considering the influence of heat transfer on the separation results in decrease of the height of zone of the mass transfer in the countercurrent crystallization apparatus.
52-55 54
Abstract
The organization and methodical support of the theoretical education of the graduate students specializing in the «Bioorganic chemistry» and «Biotechnology» are presented. Experience accumulated upon teaching the graduate students on the Department of Biotechnology and Department of Chemistry and Technology of Biologically Active Compounds of Lomonosov State Academy of Fine Chemical Technology in 2006/2007 and 2007/2008 academic years is discussed.

CHEMISTRY AND TECHNOLOGY OF MEDICINAL COMPOUNDS AND BIOLOGICALLY ACTIVE SUBSTANCES

56-60 67
Abstract
Cycloimide bacteriochlorin p glycolconjugates with lactosylamine derivatives were obtained and their spectral properties were investigated for the first time.
61-66 67
Abstract
Neoglycolipids based on azide containing D-lactose derivative and di-esters of L-glutamic acid with terminal acetylene group were synthesized by click-chemistry technology. Prepared compounds could be utilized in targeted drug delivery systems.
67-74 64
Abstract
Magnetic field influence on the macrophage with the absorbed magnetic particles is investigated. It is demonstrated that the application of magnetic field changes the speed of sedimentation of cells. Changes of the nonsymmetrical indicatrix of the scattered light indicates that shape of the cells have changed under the influence of the magnetic field.

CHEMISTRY AND TECHNOLOGY OF ORGANIC SUBSTANCES

75-82 61
Abstract
The molecular and electronic structures and thermodynamic parameters of the reagents and the products of the Direct Synthesis Reaction of alkoxysilanes and organoalkoxysilanes from silicon, alcohols and ethers were calculated by the Hartree-Fock, DFT (including B3LYP/6-311+G**) and other methods of computational chemistry.
83-84 69
Abstract
Theoretical analysis of the possibility of conjugating the reaction of formaldehyde formation via dehydrogenation of methanol with other initiating reactions is conducted; and advantages of using hydrogen peroxide vs. organic inductors are discussed. When hydrogen peroxide is used, the reaction reaches stationary condition almost immediately. It is demonstrated that the induction and the targeted reaction proceed with high selectivity towards formaldehyde.

CHEMISTRY AND TECHNOLOGY OF INORGANIC MATERIALS

85-89 64
Abstract
Analysis of the dissipation phenomena in the polycrystalline palladium in the range of temperatures from 120K to 800 K was conducted based on the spectrum of internal friction. It has been determined that set of relaxation mechanisms and kinetic phenomena contribute to the background of the spectrum.
90-94 74
Abstract
Highly effective, carbon supported nano-structured electrocatalysts for application in hydrogen compressor with solid polymer electrolyte (PEM) are synthesized using a magnetron-ion dispersion method. New membrane electrode assemblies (MEA) are developed, using the synthesized catalytic materials. The MEAs allow for high specific characteristics of the hydrogen compressor. The developed electrocatalysts also can find applications in the other systems such as fuel cells and water electrolyzers with PEMs.also can find applications in the other systems such as fuel cells and water electrolyzers with PEMs.
95-99 91
Abstract
The method of solid solution calculation in the system Ln32]M3O12 - Ln3[ScyМ2-y]M3O12 (Ln = La-Lu, Y; М = Ga, Al) has been developed. The theoretical model has been confirmed by experimental data.

SYNTHESIS AND PROCESSING OF POLYMERS AND POLYMERIC COMPOSITES

100-102 51
Abstract
The article describes different approaches towards finding solubility parameter of fluorpolymers and also provides comparative analysis of the obtained values.
103-106 71
Abstract
The effect of addition of polymeric blends to spinning solution on fiber diameter and on structure of the electrospun nanofibrous materials is investigated.

MATHEMATICAL METHODS AND INFORMATION SYSTEMS IN CHEMICAL TECHNOLOGY

107-109 59
Abstract
The paper discusses basic principals of thermoelasticity, which derived from the key equations in dynamic approximation.
110-113 56
Abstract
In the framework of the statistical approach the non-linear «structure - melting point» model for pyrazolone derivatives is constructed. Number of topological parameters calculated from the structural formula was used for the quantitative description of the molecular structure. The results of calculation of the melting points for a series of compounds of considered class are reported.


ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)