V. V. Lunin

Moscow State Textile University, Moskva, Moscow, Russia

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Publications (364)351.69 Total impact

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    ABSTRACT: Lipids are produced with a 60 wt % yield in terms of dry biomass in the course of fermentation of oleaginous fungi at 27-28A degrees C for 4-5 days. Triglycerides are extracted by supercritical carbon dioxide in a flow regime at 80-100A degrees C and 50 MPa. The fatty acid methyl esters (FAME) are synthesized via a two-step transesterification of triglycerides with a 98% yield. It is demonstrated using a combined method of chromatography-mass spectrometry that the fatty acid composition of the fungal lipids from Cunninghamella echinulata is close to that of rapeseed oil.
    Russian Journal of Physical Chemistry B 12/2015; 8(8):1004-1008. DOI:10.1134/S1990793114080028 · 0.36 Impact Factor
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    ABSTRACT: Electron structure of pivalate heterometallic trinuclear complexes with a triangular structure and varying ligands environment is studied by the XPS method. An effect of substitution of one of the Fe atoms by MMn, Co, Ni on Fe2p and M2p spectra is studied. Redistribution of electron density in an OCO group upon formation of complexes and introduction of donor ligands is discovered. Correlation of the characteristics of photoelectron spectra with the variation of ligands environment is studied. The complexes are assigned to high-spin ones with Fe in oxidation state III, and M, II. A relation is established between Fe2p-spectra characteristics and electron affinity of M ions.
    Journal of Electron Spectroscopy and Related Phenomena 11/2015; 205:1-5. DOI:10.1016/j.elspec.2015.07.002 · 1.44 Impact Factor
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    ABSTRACT: This work systematically studies adsorption properties of carbon nanomaterials that are synthesized through hydrocarbons that is a powerful technique to fabricate different kinds of carbon materials, e.g., nanotubes, nanoshells, onions, including nitrogen substituted. The adsorption properties of the as-synthesized carbons are achieved by low temperature nitrogen adsorption and organic vapors sorption. Heptane, acetonitrile, water, ethanol, benzene and 1-methylimidazole, which are of great importance for development of supercapacitors, are used as substrates. It is discovered that while nitrogen adsorption reveals a high specific surface area, this parameter for most of organic compounds is rather small depending not only on the size of its molecule but also on chemical interactions for a pair adsorbent–adsorbate. The experimental values of heat of adsorption for carbon and N-substituted structures, when Coulomb cross-coupling of nitrogen atoms in adsorbent and adsorbate takes place, confirms this supposition.
    Materials Research Bulletin 09/2015; 69. DOI:10.1016/j.materresbull.2015.01.001 · 2.29 Impact Factor
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    ABSTRACT: Nitrogen doped carbon nanoflakes, which are very important for many electrochemical applications, were synthesized by pyrolysis of nitrogen containing organic compounds over metal oxide template. Acetonitrile, pyridine and butylamine, which are of different volatility were tested as N-containing precursors. Morphology, structure and chemical composition of the as-synthesized materials were investigated by scanning electron microscopy (SEM), high resolution transmission electron microscopy (TEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that materials are highly defective and consist of a few malformed graphene layers. X-ray photoelectron spectra reflect the dominant graphitic and pyridinic N-bonding configuration. It was also noted that specific surface area depends on the duration and temperature of the reaction. Increase in duration and temperature led to decrease of the specific surface area from 1000 to 160 m2/g, 1170 to 210 m2/g and 1180 to 480 m2/g for acetonitrile, butylamine and pyridine precursors, respectively.
    Materials Research Bulletin 09/2015; 69:7-12. DOI:10.1016/j.materresbull.2014.12.057 · 2.29 Impact Factor
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    ABSTRACT: The kinetic curves of ozone absorption by aspen wood were obtained. Processing of wood with peracetic acid gave cellulose samples. The yields of ozonated wood, water-soluble compounds, and cellulose were determined for the samples corresponding to different consumptions of ozone. The IR absorption spectra of wood and cellulose isolated from ozonated wood were analyzed. The supramolecular structure of cellulose can be changed by varying the conditions of wood ozonation.
    Russian Journal of Physical Chemistry 08/2015; 89(8):1458-1463. DOI:10.1134/S003602441508021X · 0.56 Impact Factor
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    ABSTRACT: Abstract The possibility of using mixed oxides of palladium and zirconium obtained with biotemplates (cellulose and wood pulp) as the precursor of catalysts for the hydrodechlorination of chlorobenzene is analyzed. The properties of the samples are studied by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), the Brunauer-Emmet-Teller (BET) method, and temperature-programmed reduction (TPR). They are then compared to the properties of a supported analogue. The biomorphic precursors are characterized by high porosity and include micropores, mesopores, and macropores; the results from TPR reveal the presence in the precursors of several forms of PdO that differ by reduction temperature. It is shown that the distribution of palladium in the catalysts obtained by reducing the precursors with hydrogen depends on the method used in synthesizing the precursor. It is shown that the studied catalysts ensure 100% conversion of chlorobenzene at temperatures of 100 to 250°C. It is established that cyclohexane is the principal product in the presence of the supported catalyst across the range of temperatures, while cyclohexane and benzene are detected among the products in the presence of biomorphous samples at temperatures above 130°C. The effect the presence of an admixture of alkaline and alkaline-earth metals in the catalyst has on the selectivity of the process is noted. It is established that the catalysts operate in a stable manner for at least 27 h of use under experimental conditions.
    Russian Journal of Physical Chemistry 07/2015; 89(7):1163-1172. DOI:10.1134/S0036024415070262 · 0.56 Impact Factor
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    ABSTRACT: Catalytic activity of several graphene- and diamond-based carbon nanomaterials was compared in the reaction of the 1,2-dichloroethane (DCE) conversion using the impulse microcatalytic method. Only nanodiamonds and Ni-doped nanodiamonds were active in the reaction. A comparison of XRD, XPS, DRIFTS, and BET studies suggested that nitrogen or oxygen-containing groups could be responsible for the catalytic activity in the DCE reaction. However, nitrogen-doped carbon nanoflakes, which contain much more nitrogen-containing groups, showed no activity in the DCE conversion; hence, it is unlikely that nitrogen-containing groups of nanodiamond surface are active centers in DCE conversion. The role of oxygen-containing groups was studied in a test reaction of 2-propanol dehydrogenation/dehydration – both nanotubes and nanodiamonds were active in the reaction; however, no activity of carbon nanotubes in the DCE conversion suggests that oxygen-containing groups are not active in the DCE conversion. As a result, we suggest that the carbon surface of nanodiamonds might be catalytically active in the DCE reaction.
    Applied Surface Science 07/2015; 355:74-81. DOI:10.1016/j.apsusc.2015.07.084 · 2.71 Impact Factor
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    ABSTRACT: ENTHALPY VALUES FOR BROMINE IONS’ HYDRATION IN AQUEOUS SOLUTIONS Karpov G. V. , Morozov I. I. , Vasiliev E. S. , Savilov S.V. , Lunin V.V. †Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin str. 4, 119991 Moscow, Russia, Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia, morozov@chph.ras.ru Changes of enthalpy, ΔH, in the course of bromine ions’ hydration with different number of water molecules in aqueous solutions were determined using the mass spectrographic method of electrolyte solutions electrospray in vacuum (ESESv). It was found that the Vant Hoff law holds during the addition of the two first water molecules, whereas addition of the third and fourth water molecules leads to an abrupt decrease of ΔH and violation of the Vant Hoff law. It may be argued that the inner part of the bromine ions’ hydrate shell can contain up to two water molecules. The next water molecules create the outer part of the shell, which is an intermediate structure between the structures of the inner hydrate shell and pure solvent (water). NaBr ↔ Br- + Na+ It is followed by a process of Br- ion hydration: Br−- + nH2O → (Br)− (H2O)n (n = 1,2,3,4,…) In equilibrium condition, hydration and dehydration of negative ions occur in aqueous electrolyte solutions. In our case of the solution of bromine salts, these processes can be described by the equation: Br−(H2O)n + H2O ↔ Br−(H2O)n+1 According to the Vant Hoff law for electrolyte solutions in equilibrium condition, there should be a linear dependence of the logarithm of the ratio of Br−(H2O)n to Br−(H2O)n+1 concentrations on the reciprocal temperature of the solution, T−1. The slope of this dependence determines the value of enthalpy ΔH during the attachment of one more water molecule to bromine ion: ln (In / I(n+1)) = Const + (ΔH / RT), where In and I(n+1) are the intensities of the mass spectral lines corresponding to Br−(H2O)n and Br−(H2O)n+1 ions concentrations, respectively; n is the number of water molecules in the hydrate shell (degree of hydration); and R is the universal gas constant. Results ΔH values for each bromine isotope were determined: Br− + H2O → Br− (H2O) ΔН = (-6,8 ± 0,4) кcаl mоle-1 Br− (Н2О) + H2O → Br− (H2O)2 ΔН = (-5,0 ± 1,0) кcаl mоle-1 Br− (Н2О)2 + H2O → Br− (H2O)3 ΔН = (-1.8 ± 0.8) кcаl mоle-1 Br− (Н2О)3 + H2O → Br− (H2O)4 ΔН = (+2.0 ± 8.8) кcаl mоle-1 The experimental results show the instability of the hydrated ion containing four water molecules. The enthalpy values ΔН at addition of the first and second water molecules to bromine ions are equal to (- 28.5 ± 1.7) and (- 21 ± 4.2) kJ mole-1 respectively. Reference Dunsyuryun, D.H., Karpov, G.V., Morozov, I.I. Chem. Phys. Lett. (1995), 242, 390-394. Karpov, G.V., Chem. Phys. Lett. (2005), 402, 300-305, Karpov, G.V., Russian Journal of Electrochemistry, (2010), Vol. 46, No. 1, pp. 95–99. Sungnam Park, Fayer, M. D., PNAS, (2007), 104, 43, 16731–16738. Sremaniak, L., Perera, L., Berkowitz, M.L., Chem. Phys. Lett. (1994), 218, 377-382.
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    ABSTRACT: The effect the nature of activated carbons prepared from natural renewable resources has on the metal particle size in cobalt- and iron-containing systems that can be used as catalysts in Fischer-Tropsch synthesis (FTS) is studied. The highest dispersity is observed for the Co3O4-WS (wood sawdust) system. The average particle size is 9.5 nm.
    Russian Journal of Physical Chemistry 06/2015; 89(6):1065-1069. DOI:10.1134/S0036024415060229 · 0.56 Impact Factor
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    ABSTRACT: The addition of an antioxidant (2-ethyl-6-methyl-3-hydroxypyridine hydrochloride) to a culture of the fungus Lentinus tigrinus growing on a medium with lignosulfonate inhibited growth and changed the composition of cell phospholipids. The ratio of lipid messengers also changed, the phosphatidic acid level decreased, and the content of phosphatidylinositol dramatically increased. The substitution of lignosulfonate with glucose and the addition of an antioxidant increased the biomass yield of L. tigrinus, as well as that of another fungus, Cunninghamella japonica, which was incapable of biodegrading the biopolymer. The obtained results indicate the specificity of growth processes in the presence of lignosulfonate and confirm the role of free radical oxidation reactions in the biodegradation of this biopolymer by L. tigrinus.
    Applied Biochemistry and Microbiology 05/2015; 51(3):350-354. DOI:10.1134/S0003683815030102 · 0.74 Impact Factor
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    ABSTRACT: The catalytic activity of a detonation nanodiamond and its Ni-containing forms in the conversion of 1,2-dichloroethane is studied and compared with the activity of other carbon and nanocarbon materials: carbon nanotubes, “Dalan” synthetic diamond, and fluorinated graphite. The surface and structure of the carbon materials are characterized using XRD, diffuse reflectance IR spectroscopy, XPS, BET, and TPR. The catalytic properties of the materials are studied using the pulsed microcatalytic method. It is found that the synthetic diamond, the nanodiamond, and its Ni-containing forms are catalysts for dichloroethane conversion in a nitrogen atmosphere, where the main product is ethylene. It is noted that the catalytic activity of deactivated diamond catalysts is restored after hydrogen treatment. It is shown that the carbon structure of the nanodiamond and the “Dalan” synthetic diamond with hydrogen groups located on it plays a key role in the dichloroethane conversion. It is found that the nanodiamond acts simultaneously as a catalyst and an adsorbent of chlorine-containing products of dichloroethane conversion.
    Russian Journal of Physical Chemistry 04/2015; 89(4). DOI:10.1134/S0036024415040251 · 0.56 Impact Factor
  • I. S. Tkachenko · S. N. Tkachenko · V. V. Lunin
    Water Practice & Technology 03/2015; 10(1). DOI:10.2166/wpt.2015.005
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    ABSTRACT: The interaction between ozone and mono-, di-, and trichloroacetic acids are studied using a flow vacuum gas discharge setup in a regime close to stratospheric conditions (in the temperature range of 77 to 250 K, at pressures of 10−3 to 0 Torr, and in the presence of ice). The interaction between ozone and trichloroacetic acid starts at 77 K, while interaction with monochloroacetic acid begins when the temperature is raised to 200 K. The reactions are assumed to proceed via different mechanisms: chlorine oxides of different composition are the reaction products, as is shown using low-temperature IR spectroscopy. Preliminary adsorption of the acids on a surface of ice raises the temperature of interaction to 190 K.
    Russian Journal of Physical Chemistry 01/2015; 89(1). DOI:10.1134/S0036024415010264 · 0.56 Impact Factor
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    ABSTRACT: The transformations of glucose over the Pt/C catalyst in a flow reactor in the temperature range 140-200°C at a pressure of 5.0 MPa have been studied. The main routes of glucose conversion in an aqueous phase in the presence of hydrogen, helium, or air have been considered. A product formation scheme depending on the reaction parameters has been proposed. At 140°C, glucose hydrogenation into sorbitol occurs with a selectivity of 77%. In an oxidizing atmosphere, glucose transforms into gluconic acid (with 73% selectivity at 140°C); here, the formation of sorbitol and mannitol (with a selectivity of 5-7% at 180-200°C) is also possible. Glucose transformation by-products, such as C3-C5 polyatomic alcohols, ketones, acids, and furfural derivatives, have been identified. The degree of glucose reforming in the aqueous solution with the formation of the gaseous products H2 and CO2 is no higher than 10% at 200°C.
    Kinetics and Catalysis 01/2015; 56(1):84-88. DOI:10.1134/S0023158415010073 · 0.76 Impact Factor
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    S.V. Savilov · A.V. Egorov · A.S. Ivanov · V.V. Lunin
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    ABSTRACT: Experiments on absorption of TmCl3 and Tm(NO3)3 from dry acetonitrile and aqueous solutions, respectively, were performed using carboxylated multiwalled carbon nanotubes with conic and cylindrical displacement of graphene layers. Using HAADF TEM imaging and EDX spectroscopy it was found that in the first case the chemisorption with complex compound formation with oxygen from carboxylated MWCNTs takes place while in the later this process is hampered by kinetic factor and side reactions with water. The data obtained are in good agreement with results of thermal-mass spectral and elemental CHNSO analysis. This particularity allows using transmission electron microscopy and related techniques for direct surveying of light atoms-containing groups on the surface of carbon materials. In the case of carboxylated cylindrical and conic MWCNTs it demonstrate that nanotubes in the second case are uniformly covered by functional groups while in the first – near the ends of tubes and the local defects along the surface.
    Procedia Engineering 12/2014; 93. DOI:10.1016/j.proeng.2013.11.038
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    ABSTRACT: Present work deals with the pseudocapacitance of carbon nanomaterials modified by nitrogen heterosubstitution and electroactive polymers taking place in ionic liquids and lithium salts solutions in organic media. It is shown that N-doped materials, where nitrogen atoms are located within grahene layers, due to excess of electrons and variation of specific cooperation demonstrates higher capacitance than non-doped samples in the whole range of voltage applied, restricted by electrochemical stability window of electrolyte. The values were found to mostly depend on correlations of the ions size and pore size in the material. For composites of carbon nanotubes with electroactive polypyrrole, obtained electrochemically in the ionic liquid, the capacitance can increase more than 3 times due to reversible red-ox processes. In case of high purity of components there were no polymer degradation process observed. The possibility of implementation of mixed electrolytes based on solutions of high voltage ionic liquids with symmetrical electrochemical stability window and lithium salts in dry acetonitrile for realization of pseudocapacitance effect together with ion-pore size correlations is proposed.
    Materials Technology 11/2014; 29(A2):A98-A106. DOI:10.1179/1753555714Y.0000000187 · 1.23 Impact Factor
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    ABSTRACT: A mechanism and kinetic model for the synthesis of peroxide radical condensate via the low-temperature interaction of hydrogen atoms with O2 molecules is proposed. The main components of the reaction, hydrogen tetroxide H2O4 and hydrogen peroxide H2O2, are formed in a low-temperature liquid layer formed near the cold surface during synthesis. Molecules of H2O4 and H2O2 are stabilized by transitioning to the solid phase. The dependences of the \(N_{O_2 } /N_{H_2 O_2 }\) ratio on the ratio of concentrations of H and O2 in the gas phase, calculated on the basis of the model, are consistent with the experimental data.
    Russian Journal of Physical Chemistry 09/2014; 88(9). DOI:10.1134/S0036024414090222 · 0.56 Impact Factor
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    ABSTRACT: Heterometallic compounds of general formula [Fe 2 III MIIO(O2CR)6(H2O)3] · 3H2O (R = CH3, M = Co, Ni; R = CCl3, M = Co, Ni) have been studied by XPS. The compounds have been identified as high-spin complexes with metal atoms in oxidation states M(II) and M(III). Analysis of the XPS data revealed the tendency of the XPS pattern and magnetic parameters of molecules to change with a change in the electronic nature of metal atoms. The assignment is based on the degree of covalence of the M-O bond. In chloro-substituted heterocomplexes, electron density delocalization on the metal atoms with metal-to-ligand charge transfer through three bonds (M-O-C-C) is observed. The substitution in terminal groups leads to the change in the electron density distribution between the carboxylate and terminal groups.
    Russian Journal of Inorganic Chemistry 07/2014; 59(7):670-677. DOI:10.1134/S0036023614070067 · 0.49 Impact Factor
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    ABSTRACT: Filamentous ribbon-like structures of highly disordered carbon of thickness 10-100 nm built from merged individual carbon nanofibers were synthesised by chemical vapour deposition from saturated ferrocene-benzene solution at 950 K. The materials obtained were characterized by electron microscopy, x-ray and electron diffraction, Raman spectroscopy and a possible growth mechanism for their formation was proposed and discussed. The synthesis demonstrates the possibility of a template growth of carbon nanomaterials and supports the vapour-solid-solid growth model of carbon materials because the catalysing metal particles are solid under the experimental conditions. Due to the large number of structural defects, filamentous structure, submicrometer thickness and low intraparticle diffusion of the nanomaterials, they can find application in catalysis as catalyst supports and sorbents.
    Applied Surface Science 07/2014; 308:388-395. DOI:10.1016/j.apsusc.2014.04.181 · 2.71 Impact Factor
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    ABSTRACT: During cultivation of the filamentous fungus Lentinus tigrinus on a medium containing lignin, a high oxygen content stimulated the growth of the fungus and contributed to the yield of lipids. A high content of phosphatidic acid and a reduction in the level of phosphatidylethanolamine and phosphatidylserine were first detected in the composition of phospholipids. Changes in the composition of neutral lipids, such as variation in the ratio of esterified and free sterols, have occurred; thus, the amount of sterol esters reduced simultaneously with a decrease in the content of free fatty acids. Based on the obtained results, the possible role of phosphatidic acid as a second messenger in the process of the consumption of lignin by the fungus Lentinus tigrinus is discussed.
    Prikladnaia biokhimiia i mikrobiologiia 05/2014; 50(3):318-323. DOI:10.7868/S0555109914030246

Publication Stats

2k Citations
351.69 Total Impact Points


  • 2015
    • Moscow State Textile University
      Moskva, Moscow, Russia
  • 1992–2015
    • Moscow State Forest University
      Mytishi, MO, Russia
  • 1980–2015
    • Lomonosov Moscow State University
      • • Division of Chemistry
      • • Faculty of Chemistry
      • • Department of Organic Chemistry
      Moskva, Moscow, Russia
  • 2001–2013
    • Russian Academy of Sciences
      • • Kurnakov Institute of General and Inorganic Chemistry
      • • Institute of Laser and Information Technologies
      • • A.V. Topchiev Institute of Petrochemical Synthesis
      Moskva, Moscow, Russia
  • 2010
    • University of Nottingham
      • School of Chemistry
      Nottigham, England, United Kingdom
  • 1998–2008
    • Institute of Petrochemical Synthesis
      Moskva, Moscow, Russia
    • Moscow State University of Fine Chemical Technology
      Moskva, Moscow, Russia
  • 1996–2001
    • Boreskov Institute of Catalysis
      Novo-Nikolaevsk, Novosibirsk, Russia