CHEMICAL PROBLEMS

Abstract The effect of the third components α, α'-dipyridyl (α, α'-dip), ethylene diamine (Ed) and phenontroline (Phen) on the complexation of nickel (II) with 1-phenyl–2-(2-hydroxy–4- nitrophenylhydrozo)butanedione-1,3 was studied. NiR and mixed ligand (NiRα, α'-dip, NiREd and NiRPhen) complex compounds are formed at pH 6, 5, 4.5 and 5, respectively.The ratio of the reacting components in […]

Abstract The constant of electron exchange rate (kex.) in the system of sym. octamethylferrocene/sym. octamethylferricinium hexafluorophosphate [(СН3)4С5Н]2Fe/(СН3)4С5Н]2Fe+PF6 ] (hereinafter are denoted as Ме8Fс+/0) was determined by method of 1H NMR line broadening. The appearance of eight methyl groups in each reagent of the redox-system of Ме8Fс+/0 increases the constant of exchange rate approximately 4.8 times, […]

Abstract The proposed review is dedicated to the latest achievements in the field of magnetron deposition of thin-film anode functional layers (AFLs)for solid oxide fuel cells (SOFCs) of various designs (electrolyte-supported, anode-supported and micro-SOFC). Manufacturing of SOFCs components remains nowadays a key point for the industrial development of this electrochemical conversion device. Formation of thin […]

Abstract Metal-containing nanocomposites based on high-density polyethylene (PE) were obtained by a mechanical-chemical method without using organic solvents by high-speed thermal decomposition of organic acid salts in terms of high shear deformations. The phase composition and structure of the obtained nanocomposites were studied by the method of X-ray phase analysis (XRD). XRD diffraction patterns confirm […]

Abstract Permanent improvement of metal structures of up-to-date diesel engines actualizes creation of new, higher quality analogues of motor oils. For some time past the goal-oriented studies into application of multifunctional alkylphenolate additives АКİ (С8-С12) series as calcium salts of formaldehyde condensation with various amines ended in the creation of new lubricants of M-10Г2k и […]

Abstract The NdAs2Se4-Nd2Se3 system was investigated by methods of differential thermal (DTA), X- ray phase (XRF), microstructural (MSA) analysis, as well as microhardness and density measurements, and a T-x phase diagram was constructed. It has been established that this system is a non-quasi-binary section of the ternary Nd-As-Se system. Above the solidus temperature (6750C) the […]

Abstract The inhibition activities of 2-hydroxy-5-methylacetophenone thiosemicarbazone (1), (Z)-2-(((E)-1-(2-hydroxy-5-methylphenyl)ethylidene)hydrazono)thiazolidin-4-one (2), (E)-3-(2- hydroxy-5-((E)-phenyldiazenyl)phenyl)-1-phenylprop-2-en-1-one (3), (E)-1-(4-bromophenyl)-3- (2-hydroxy-5-((E)-phenyldiazenyl)phenyl)prop-2-en-1-one (4), (E)-5-(2-hydroxy-5- (phenyldiazenyl)phenyl)-3-phenyl-4,5-dihydro-1H-pyrazole-1-carbothioamide (5), (E)-3-(4-bro- mophenyl)-5-(2-hydroxy-5-(phenyldiazenyl)phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide (6), 2,2'-((1E,1'E)-(ethane-1,2-diylbis(azanylylidene))bis(methanylylidene))bis(4-((E)- phenyldiazenyl)phenol (7) and 2-((Z)-2-hydroxy-5-((E)-phenyldiazenyl)benzylidene)hydrazine-1- carbothioamide (8) were explored by means of weight loss measurements for mild St-3 specimen in brine-kerosene solution. The corrosion rates of the St-3 drops as the inhibitor concentration […]