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Submit scientific paper, scientific publications, International Research Journal | Meždunarodnyj naučno-issledovatel’skij žurnal

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ПИ № ФС 77 - 51217

EFFECTS OF CUT-OUT ION VOLUME AND OVERSCREENING OF DIELECTRIC FUNCTION OF THE SOLVENT IN THE NONLOCAL ELECTROSTATICS SOLVATION THEORY

Posted in 2016, CHEMISTRY, Issue November 2016 | 0 comments

The article considers the development of nonlocal electrostatic theory of ion solvation in the case when taken into account the effect of cut-out the ion volume from solvent and the overscreening of dielectric function of solvent. The calculated energy of ion solvation in this model is compared with the calculation on theory (J. Chem. Phys., 1996), which does not take into account this effect. The theory developed explains the difference in solvation energies of alkali metal cations and anions of halogens of the same radius.

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THE SYNTHESIS OF NEW ORGANOSELENIUM COMPOUNDS BASED ON CATECHOL AND SELENIUM

Posted in 2017, CHEMISTRY, Issue № 1(55) January 2017 | 0 comments

Convenient method for preparation of 2-(allyloxy)phenol from catechol and allylbromide permitting to obtain the product in high purity has been developed. The reaction of selenium dibromide with 2-(allyloxy)phenol leading to the formation of linear Markovnikov product, bis[2-bromo-3-(2-hydroxyphenoxy)propyl]selenide in 97% yield has been studied. The action of a base (K2CO3) on this compound led to a number of products including the target compound bis(2,3-dihydro-1,4-benzodioxin-2-ylmethyl)selenide – the result of intramolecular substitution with the formation of two 2,3-dihydro-1,4-benzodioxine cycles. The major product is 2-(allyloxy)phenol as a result of elimination of selenium dibromide from bis[2-bromo-3-(2-hydroxyphenoxy)propyl]selenide.

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PURIFICATION OF WATER FROM DIESEL FUEL

Posted in 2016, CHEMISTRY, Issue December 2016 | 0 comments

The conditions for efficient separation of dissolved diesel fuel using an ionic surfactant – sodium dodecyl sulfate and gelatine solution were determined. Reduction of dissolved hydrocarbons correlates with a decrease in the interfacial tension at the interface of the aqueous solution / diesel fuel and is determined by the weight ratio of gelatine and surfactant. Most steady foam, containing a diesel fuel, is got from the solution of 2 ·10-3 mol/l SLS +0,1% gelatine. The maximal (on 91, 3%) decline of cut-in diesel fuel was looked after at the use of foam of the indicated composition.

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STABILITY OF LITHIUM-CONDUCTING POLYMER ELECTROLYTES VERSUS AQUEOUS SOLUTIONS OF ACIDS AND ALKALIS

Posted in 2016, CHEMISTRY, Issue October 2016 | 0 comments

The article considers data of stability of lithium-conducting polymer films based on fluoropolymer F-62 and lithium perchlorate as ionogenic salt versus aqueous solutions of acids and alkalis – hydrochloric acid and lithium hydroxide in pH range 1÷13. Both chemical composition change and conductivity shifts of samples are investigated under exposure in water solutions. The research is aimed to estimate the applicability of polymer electrolytes as lithium metal protection from water in lithium-air power sources.

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ABOUT TWO GENERATIONS OF AN ACTIVE FURNACE BRANDS CARBON BLACK FOR ELASTOMERS AND PLASTICS

Posted in 2016, CHEMISTRY, Issue August 2016 | 0 comments

The analysis of features of the stove technology and structure, strengthening properties and prospects of application of smooth and macroporosity series of brands of active техуглерода is Given. Influence of structuralness and macroporosity of carbon black is investigational on a structure and properties of standard rubber mixtures. Influence of strengthening of vulcanizing group is investigational on a structure and properties of compositions with the critical filling with NR smooth and macroporosity carbon black.

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DEFINITION OF QUALITY OF ESSENTIAL OILS

Posted in 2016, CHEMISTRY, Issue July 2016 | 0 comments

Essential oils have many beneficial properties, so are in great demand in the international market. Many manufacturers go to lengths to increase the production of the final product. The problem of falsification of today is particularly relevant. Use of counterfeit essential oils adversely affects the health. Today’s society is experiencing an unprecedented surge of interest in alternative and traditional medicine. The value of essential oils increases when worsens psychological atmosphere, the ecological situation and geomagnetic conditions.

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