Formation and Properties of Electron- and Ion-Conducting Layers of N-Substituted PVC Derivatives Grafted onto Active Carbon

Protection of Metals and Physical Chemistry of Surfaces - A systematization is presented of studies of carbon sorbent functionalization based on chemical modification of the active carbon surface...     

Photoelectrocatalytic Oxidation of Formic Acid in the Visible Spectral Region on Films of Nanocrystalline Titanium Oxide Doped by Bismuth

Protection of Metals and Physical Chemistry of Surfaces - A method of formation of film coatings of titanium dioxide doped by bismuth ions (Bi3+) is developed on the basis of sol–gel...     

One‐Step Synthesis of Chiral Azamacrocycles via Palladium‐Catalyzed Enantioselective Amination of 1,5‐Dichloroanthraquinone and 1,5‐Dichloroanthracene

Asymmetric amination of 1,5‐dichloroanthraquinone and 1,5‐dichloroanthracene with di‐ and trioxadiamines catalyzed by palladium complexes with various chiral phosphine ligands gave chiral macrocycles with ee values of up to 60%. The dependence of the chemical yields and enantiomeric excess on the nature of the starting compounds and the phosphine ligands employed was demonstrated. An unexpected spontaneous resolution upon crystallization of the macrocycle comprising anthraquinone and dioxadiamine moieties was observed while in the case of the macrocycle with a trioxadiamine linker racemic monocrystals were obtained. Crystallization of the enantiomerically enriched mixtures afforded chiral macrocycles with 88–99% ee.     

The Deuterium attack of titanium electrodes under electric discharge conditions

Electrochemical and electrophysical investigations methods of TiD₂, LiD(_v)-LiD(_m)-Me systems with subsequent structure and metallographic testing of the titanium electrodes were carried out. Electrophysical properties of a system depend upon metallic (liquid) cathode emission properties. TiD₂ content was shown to be higher in Ti anodes with significant surface changes (nondeep cracks creation) after testing and Ti-cathodes show deep cracks. The maximal hardened material was observed at the crack creation zone.     

Correlated single-electron tunneling via mesoscopic metal particles: Effects of the energy quantization

The existing theory of correlated single-electron tunneling in the double normalmetal tunnel junction is extended to the case of an ultrasmall central electrode of the structure. It is shown that the form of theI–V curve of such a system depends on the energy relaxation rate in this electrode. For realistic values of the relaxation rate, the large-scale shape of the dcI–V curve, which is associated with Coulomb correlations, is close to that following from the earlier theory. However, theI–V curve should also exhibit small-scale singularities reflecting the structure of the energy spectrum of the central electrode.     

Estimates of the electron temperature of a micropinch-discharge plasma by attenuation of the X-ray flux in a photoemulsion

A study has been performed on the Zona-2 high-current pulsed micropinch installation. The spatial structure and the spectral distribution of X rays emitted by the plasma have been investigated with the use of a three-channel pinhole camera and a set of absorbing filters. The behavior of attenuation curves points to the presence of two groups of electrons having different energies in the micropinch region and, accordingly, to values of thermal electron temperature T _e and epithermal electron temperature T _ep (T _e ≈ 1.9 ± 0.7 keV and T _ep ≈ 20 ± 8 keV). A detector based on a plastic scintillator has been used for studying the spectrum dynamics. Two crystal spectrographs have been used to obtain spectra of multiply charged ions. It has been found that changes in the electrode surface affect the development of the discharge.