V. G. Krasovskiy
Russian Academy of Sciences
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Physical Chemistry Chemical Physics | 2009
Alexey Deyko; Kevin R. J. Lovelock; Jo-Anne Corfield; Alasdair W. Taylor; Peter N. Gooden; Ignacio J. Villar-Garcia; Peter Licence; Robert G. Jones; V. G. Krasovskiy; Elena A. Chernikova; L. M. Kustov
We report the enthalpies of vaporisation (measured using temperature programmed desorption by mass spectrometry) of twelve ionic liquids (ILs), covering four imidazolium, [C(m)C(n)Im]+, five pyrrolidinium, [C(n)C(m)Pyrr]+, two pyridinium, [C(n)Py]+, and a dication, [C3(C1Im)2]2+ based IL. These cations were paired with a range of anions: [BF4]-, [FeCl4]-, [N(CN)2]-, [PF3(C2F5)3]- ([FAP]-), [(CF3SO2)2N]- ([Tf2N]-) and [SCN]-. Using these results, plus those for a further eight imidazolium based ILs published earlier (which include the anions [CF3SO3]- ([TfO]-), [PF6]- and [EtSO4]-), we show that the enthalpies of vaporisation can be decomposed into three components. The first component is the Coulombic interaction between the ions, DeltaU(Cou,R), which is a function of the IL molar volume, V(m), and a parameter R(r) which quantifies the relative change in anion-cation distance on evaporation from the liquid phase to the ion pair in the gas phase. The second and third components are the van der Waals contributions from the anion, DeltaH(vdw,A), and the cation, DeltaH(vdw,C). We derive a universal value for R(r), and individual values of DeltaH(vdw,A) and DeltaH(vdw,C) for each of the anions and cations considered in this study. Given the molar volume, it is possible to estimate the enthalpies of vaporisation of ILs composed of any combination of the ions considered here; values for fourteen ILs which have not yet been studied experimentally are given.
Russian Chemical Reviews | 2015
Elena A. Chernikova; L. M. Glukhov; V. G. Krasovskiy; L. M. Kustov; M G Vorobyeva; A. A. Koroteev
The practical aspects and prospects of application of ionic liquids as heat transfer fluids are discussed. The physicochemical properties of ionic liquids (heat capacity, thermal conductivity, thermal and radiation stability, viscosity, density, saturated vapour pressure and corrosion activity) are compared with the properties of some commercial heat transfer fluids. The issues of toxicity of ionic liquids are considered. Much attention is paid to known organosilicon heat transfer fluids, which are considered to have much in common with ionic liquids in the set of properties and are used in the review as reference materials. The bibliography includes 132 references.
Green Chemistry | 2010
Marya Nefedieva; Olga Lebedeva; Dmitry Kultin; L. M. Kustov; Svetlana A. Borisenkova; V. G. Krasovskiy
Two ionic liquids 1-methyl-3-butylimidazolium (BMImBF4) tetrafluoroborate and 1-methyl-3-octylimidazolium (OMImBF4) tetrafluoroborate were studied from the viewpoint of removing aromatic sulfur-containing compounds from hydrocarbon mixtures using transition metal ions as complexing centers. The values of distribution coefficients (D) indicate that OMImBF4 absorbs benzothiophene (BT) and dibenzothiophene (DBT) better than BMImBF4, which corresponds to the increasing absorption ability of the IL due to the presence of a longer hydrocarbon (octyl) chain in the third position of the imidazolium ring. The influence of additives of various complexes of cobalt(II) on the extraction of BT and DBT was studied in the system OMImBF4–heptane. The planar complex of the Na-salt of 4,5-dicarboxyphthalocyanine of cobalt was found to be the most efficient for the extraction of both substances. The electrochemical approach enables one to purify the IL from BT and DBT by electrochemical oxidation or reduction. This result can be used for searching ways to increase the degree of extraction of BT and DBT in hydrocarbon–IL systems.
Russian Chemical Bulletin | 2014
E. D. Finashina; L. M. Kustov; O. P. Tkachenko; V. G. Krasovskiy; E. I. Formenova; I. P. Beletskaya
A possibility of using heterogeneous catalysts with a low silver content for the direct carb-oxylation of phenylacetylene by carbon dioxide was demonstrated. A comparative study of the efficiency of the heterogeneous Ag-containing catalysts on different oxide supports (F-γ-Al2O3, γ-Al2O3, TiO2, SiO2) revealed that phenylpropiolic acid in the highest yield (62.1%) was achieved on the 0.5% Ag/F-Al2O3 catalysts.
Russian Journal of Physical Chemistry A | 2015
L. M. Glukhov; V. G. Krasovskiy; Elena A. Chernikova; G. I. Kapustin; L. M. Kustov; A. A. Koroteev
Five new ionic liquids formed by doubly charged cations containing a siloxane moiety and bis(trifluoromethylsulfonyl) imide anion are synthesized and characterized. Their thermal stability is studied by means of TGA; melting points (glass transition temperatures) and densities are measured. The temperature dependences of kinematic viscosity of the obtained ionic liquids are presented along with their approximations by the Vogel–Tammann–Fulcher equation.
Russian Chemical Bulletin | 2014
Elena A. Chernikova; L. M. Glukhov; V. G. Krasovskiy; L. M. Kustov; A. A. Koroteev
Four novel ionic liquids with siloxane-functionalized cations were synthesized and characterized. Their thermal stability was studied by the TG method; glass transition points, viscosities, and densities were also measured.
Russian Chemical Bulletin | 2017
V. G. Krasovskiy; L. M. Glukhov; Elena A. Chernikova; G. I. Kapustin; O. B. Gorbatsevich; A. A. Koroteev; L. M. Kustov
Dicationic ionic liquids with bis(trifluoromethylsulfonyl)imide anions and dimethylimidazolic moieties linked by the polymeric siloxane chain in the cation structure have been synthesized. Thermal stability of the compounds synthesised was studied by TGA; glass transition temperatures, viscosities and volatility in vacuo were measured. Applicability of these ionic liquids as heat carriers under high dynamic vacuum conditions is shown.
Russian Journal of Organic Chemistry | 2018
V. G. Krasovskiy; Elena A. Chernikova; L. M. Glukhov; G. I. Kapustin; A. A. Koroteev; L. M. Kustov
Hydroxyl-containing ionic liquids were synthesized by quaternization of 1,2-dimethyl-1H-imidazole, N-methylpyrrolidine, and pyridine with 2-chloroethanol or 6-chlorohexan-1-ol, followed by exchange of chloride ion for bis(trifluoromethanesulfonyl)azanide, and their properties were studied.
Physical Chemistry Chemical Physics | 2009
Alexey Deyko; Kevin R. J. Lovelock; Jo-Anne Corfield; Alasdair W. Taylor; Peter N. Gooden; Ignacio J. Villar-Garcia; Peter Licence; Robert G. Jones; V. G. Krasovskiy; Elena A. Chernikova; L. M. Kustov
Physical Chemistry Chemical Physics | 2012
Alexey Deyko; Stephen G. Hessey; Peter Licence; Elena A. Chernikova; V. G. Krasovskiy; L. M. Kustov; Robert G. Jones