Synthesis of 3-Thiopropionyl Derivatives of 1,3,4-Benzothiadiazepine as Potential Vasopeptidase Inhibitors

Russian Journal of General Chemistry - A method of synthesis of 3-thiopropinyl derivatives of 5-oxo-1,3,4-benzothiadiazepine-4-acetic acid, potential antihypertensive drugs, vasopeptidase...     

Synthesis and optical properties of copolymers of 4-aminostyrene with the side styrylquinoline chromophore groups

Successive molecular assembling in polymer chains furnished a series of the comb-shaped copolymers of 4-aminostyrene containing side styrylquinoline chromophore groups. Thermal, thermomechanical, spectroscopic, and luminescent properties of the polymers and low-molecular-weight model chromophores were studied.     

Effect of ultraviolet radiation on a metal/polyamidine system

An increase in the optical transmission in electronic spectra for metal/poly(1,10-decamethylene-acetamidine) systems after UV irradiation is observed, in contrast to polymer and metal films investigated separately where there was no such effect. The increase is explained by changes in the distribution of the electric charge induced by UV irradiation at the metal/polymer interface in a polymer film.     

Effect of electrization on molecular mobility in gold nanocomposites based on arabinogalactan

A correlation is found between the proton spin-spin relaxation times in gold nanocomposites based on arabinogalactan in aqueous solutions and the maximum conducting layer thicknesses of films cast from solutions of composites. The obtained correlation is considered from the viewpoint of electrization’s effect on the mobility of macromolecules of the investigated polymer nanocomposites. The dependence of arabinogalactan mobility on the type of solvent (H₂O or D₂O) is established, and a conclusion is drawn as to the effect of the hydrogen bonds of arabinogalactan with solvent on polymer mobility in solutions.     

Resistance of dielectric polymer films with fillers in metal-polymer-metal systems

The effect of physical factors on the resistance of thin films of nonconjugated polymers was studied. The resistance of polymer films with the metal type of conductivity decreases with an increase in the amount of interchain hydrogen bonds and of metal nanoparticles in the polymer matrix, and also in the presence of a plasticizing additive. Introduction of paramagnetic admixtures and formation of interchain covalent cross-links, on the contrary, increase the resistance of polymer films.     

Synthesis of Mono- and Disaccharide 4-[(ω-Sulfanylalkyl)oxy]benzoylhydrazones as Potential Glycoligands for Noble Metal Nanoparticles

A procedure has been developed for the synthesis of previously unknown aldose 4-[(ω-sulfanylalkyl) oxy]benzoylhydrazones (where alkyl is hexyl or decyl and aldoses are D-glucose, D-galactose, D-maltose, and D-lactose) that a repromising glycoligands for noble metal nanoparticles. According to the ¹H and ¹³C NMR data, 4-[(ω-sulfanylalkyl)oxy]benzoylhydrazones derived from D-glucose, D-maltose, and D-lactose in crystal and in DMSO-d₆ solution have exclusively the cyclic pyranose structure (α- and β-anomers). D-Galactose 4-[(ω-sulfanylalkyl)oxy]benzoylhydrazones in DMSO-d₆ solution exist as tautomeric mixtures of cyclic pyranose and open-chain acylhydrazone structures.

     

Synthesis of the Gold Glyconanoparticles Based on 6-Deoxy- and 2-(Acetylamino)aldoses 3-Thiopropionylhydrazones

Russian Journal of General Chemistry - A method for the synthesis of gold glyconanoparticles with average particle size of 18–21 nm and low polydispersity index based on readily available...     

Synthesis of Gold Glyconanoparticles Based on Thiol-Containing d-Hexose Acylhydrazones and Their Modification by Thiolated Poly(2-deoxy-2-methacryloylamino-D-glucose)

Russian Journal of General Chemistry - A procedure has been developed for the synthesis of gold glyconanoparticles with an average particle size of 15–30 nm and a low polydispersity index on...     

Influence of chemical structure and chain length on conducting properties of dielectric polymers in metal/polymer/metal structures

The influence of weight-average molecular mass M _w on the maximal width of a conducting layer h _max of polysterene, polymethylmethacrylate, and polyamidine films was investigated. It was shown that h _max increases in proportion to M _w ^S for all investigated polymers. It points to the fact that the h _max value is defined by the macromolecular coil size.