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I. S. Pytskii

Bio: I. S. Pytskii is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Mass spectrometry & Ionization. The author has an hindex of 5, co-authored 27 publications receiving 81 citations.

Papers
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Journal ArticleDOI
TL;DR: It is shown that by controlling the corrosion resistance and the wettability of the superhydrophobic copper substrate, it becomes possible to sustain the bactericidal action of copper substrates for a long time, simultaneously avoiding the excessive corrosive degradation and release of copper ions in the environment.

32 citations

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TL;DR: A series of easy-to-prepare and modular chiral bisdiamidophosphites with oxalamide linkers were synthesized by means of 2D-NMR and confirmed by single-crystal X-ray diffraction as mentioned in this paper.
Abstract: A series of easy-to-prepare and modular chiral bisdiamidophosphites with oxalamide linkers were synthesized. The structures of the novel ligands were elucidated by means of 2D-NMR and confirmed by single-crystal X-ray diffraction. The reactions of such ligands with [Pd(Cod)Cl2] at molar ratios of L/Pd = 1 and 0.5 were studied by 1H, 13C, 13C DEPT, 31P, 1H–13C HSQC, 1H–13C HMBC, 1H–1H COSY, 1H–1H ROESY, 1H–15N HMBC and DOSY spectroscopy, as well as by DFT calculations. Stereoselectors of this type exhibited high enantioselectivities in the Pd-catalyzed allylic substitution reactions of (E)-1,3-diphenylallyl acetate with pTolSO2Na (up to 92% ee), CH2(CO2Me)2 (up to 97% ee), (CH2)4NH (up to 96% ee), (EtO)2P(O)CH2NH2 (up to 96% ee) and (CH2)4N(CCH(CH2)4) (up to 92% ee). ee values of up to 90%, 97% and 83% were obtained in the Pd-mediated allylic alkylation of cinnamyl acetate with ethyl 2-oxocyclohexane-1-carboxylate, allylic amination of cyclohex-2-en-1-yl ethyl carbonate with dibenzylamine and desymmetrization of N,N’-ditosyl-meso-cyclopent-4-ene-1,3-diol biscarbamate, respectively. In addition, ee values of up to >99% were achieved in the Rh-catalyzed asymmetric hydrogenation of methyl esters of unsaturated acids.

18 citations

Journal ArticleDOI
TL;DR: In this paper, surface-assisted laser desorption/ionization mass spectrometry (SALDI) was applied to study the products of 1,1-dimethylhydrazine transformation on the surfaces of construction materials.
Abstract: Surface-assisted laser desorption/ionization mass spectrometry (SALDI) was applied to study the products of 1,1-dimethylhydrazine transformation on the surfaces of construction materials. The approach proposed makes it possible to distinguish the transformation products of 1,1-dimethylhydrazine from the low-molecular-weight compounds and oligomers utilized in the production of construction materials, which undergo different transformations in the course of operational processes.

8 citations

Journal ArticleDOI
TL;DR: In this article, a matrix-enhanced laser desorption/ionization mass spectrometry was used to study Ad-0 and AMg-6 alloy surfaces using matrixenhanced LEM.
Abstract: Ad-0 and AMg-6 alloy surfaces are studied using matrix-enhanced laser desorption/ionization mass spectrometry. Inorganic salts, namely, nickel chloride and silver halides, which form cluster ions at the ionization, were taken as test molecules. Mass spectra revealed a principal difference between the desorption/ionization mechanisms depending on the surface kind and its prehistory. Qualitative and quantitative investigation of the mass spectra led to certain suppositions about the photoionization mechanisms of the cluster structures of inorganic nickel and silver salts. It is shown that, on the studied surfaces, parameters that characterize the surface chemistry can be estimated based on the mass spectra of the salts.

7 citations

Journal ArticleDOI
TL;DR: In this article, the products of conversion of 1,1-dimethylhydrazine after contact with the surface of AMg-6 alloy, which is a model of construction materials that contact with rocket fuel components, were characterized by use of chromatographic and mass-spectrometric methods Alkyl phthalates, the homologues of triphenyl phosphate, and numerous polymerhomologues related to acetone condensation products were detected in acetone extracts taken from the test surfaces
Abstract: The products of conversion of 1,1-dimethylhydrazine after contact with the surface of AMg-6 alloy, which is a model of construction materials that contact with rocket fuel components, were characterized by use of chromatographic and mass-spectrometric methods Alkyl phthalates, the homologues of triphenyl phosphate, and numerous polymer-homologues related to acetone condensation products were detected in acetone extracts taken from the test surfaces The presence of such products makes it possible to identify fuel components that contacted with the construction materials; this is important for the utilization of the detachable parts of launch vehicles

7 citations


Cited by
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01 Jan 1912

1,225 citations

Journal ArticleDOI
TL;DR: In this article, a brief review and perspective study provides an overview about the characteristics, fabrication and recent advances of three types of interfacial materials with special wettability, namely superhydrophobic, superamphiphobic and slippery liquid-infused porous surface (SLIPS) toward anti-corrosion and anti-biofouling applications.
Abstract: Nature-inspired interfacial materials with special wettability have received considerable attention owing to their superior properties and promising multifunctional applications. Owing to the unique interfacial phase contacts and liquid–repellent property, the interfacial materials with special wettability provide a great potential for corrosion inhibition and biofouling suppression. Thus, this brief review and perspective study provides an overview about the characteristics, fabrication and recent advances of three types of interfacial materials with special wettability, namely superhydrophobic, superamphiphobic and slippery liquid-infused porous surface (SLIPS) toward anti-corrosion and anti-biofouling applications. The bottlenecks and future research priorities of the functional interfacial materials with special wettability were pointed out to accelerate the comprehensive understanding and the development of this research field.

42 citations

Journal ArticleDOI
TL;DR: In this paper, a superhydrophobic surface was fabricated on aluminum alloy substrates through ammonia etching followed with 1H,1H, 2H,2H 2H-perfluorodecyltriethoxysilane (PFDTES) modification.

41 citations

Journal ArticleDOI
TL;DR: In this article, a micro-nano-structured super-hydrophobic Ni film with a mean thickness of 4μm was electrodeposited on a Cu substrate via a two-step electrodeposition process at 60°C including 8min of electrodepposition at a constant current density of 20μ/cm2, followed by 1min of electrolydeposition at 50μ/ cm2 and a subsequent chemical modification step in stearic acid solution.
Abstract: The application of hierarchically micro-nano structured superhydrophobic Ni films with increased surface roughness is known as an attractive corrosion protection strategy because the chemically modified film with a low surficial free energy is capable of keeping water molecules and aggressive species away from the coating/electrolyte interface by trapping air pockets within the micro-nano structured layer. Furthermore, corrosion inhibitors are widely used for corrosion mitigation in a broad range of industrial applications. This study tends to investigate the corrosion resistance of electrodeposited superhydrophobic Ni films in the presence of sodium molybdate (0 M, 0.03 M, 0.06 M, 0.1 M) as an inorganic corrosion inhibitor in a 3.5 wt% NaCl solution at 25 °C, up to 120 h. The micro-nano structured superhydrophobic Ni film with a mean thickness of 4 μm was electrodeposited on a Cu substrate via a two-step electrodeposition process at 60 °C including 8 min of electrodeposition at a constant current density of 20 mA/cm2, followed by 1 min of electrodeposition at a constant current density of 50 mA/cm2 and a subsequent chemical modification step in stearic acid solution. Investigation of surface topography of the film by atomic force microscopy technique (AFM) revealed that the root-mean-square of height and the skewness of the film were equal to 14.4 nm and 0.21, respectively. The morphology of the film consisted of micro-nano cones in the size range of 50 to 1000 nm. The superhydrophobic film demonstrated a passivation behavior and a pitting potential. The EIS study identified the Ni film as a non-ideal capacitor and an equivalent circuit model with two parallel time-constants fitted to the EIS data. Upon 120 h of immersion of the superhydrophobic film in the electrolyte in the presence of 0.1 M of sodium molybdate, the corrosion inhibitor efficiency of about 80% was achieved and the Ni film demonstrated the best passivation behavior and the lowest corrosion current density.

37 citations

Journal ArticleDOI
TL;DR: In this article, a set of facile methods involving selective chemical etching using concentrated NaOH, as well as fluorination with perfluoropolyether methyl ester were adopted to fabricate a superhydrophobic surface on basalt scales, having the required rough hierarchical micro-nanotextured and low surface energy.

34 citations