Yu. B. Ivanova
YOU?
Author Swipe
View article: OPTIMAL SEISMIC PROTECTION OF STRUCTURES ON BEARINGS WITH BILINEAR HYSTERETIC CHARACTERISTIC
OPTIMAL SEISMIC PROTECTION OF STRUCTURES ON BEARINGS WITH BILINEAR HYSTERETIC CHARACTERISTIC Open
The design of optimal seismic protection systems on bearings with hysteresis behavior leads to a conditional multidimensional global optimization problem with a nonlinear and non-differentiable objective function. In this paper, bearings w…
View article: Sublimation Thermodynamics of 5,10,15,20–Tetraphenyl-21-X, 23-Y-Heteroporphyrins (X=O or S; Y= N or S). The Molecular structure of 5,10,15,20-Tetraphenyl-21-thiaporphyrin
Sublimation Thermodynamics of 5,10,15,20–Tetraphenyl-21-X, 23-Y-Heteroporphyrins (X=O or S; Y= N or S). The Molecular structure of 5,10,15,20-Tetraphenyl-21-thiaporphyrin Open
Sublimation enthalpies of 10,15,20–tetraphenyl-21-oxa- (I), 5,10,15,20-tetraphenyl-21-thia- (II) and 5,10,15,20-tetraphenyl-21,23-dithia- (III) porphyrines were measured by Knudsen effusion mass spectrometry: ΔHsubl.(T) = 209±2 (561 K), 22…
View article: Spectrophotometric study of basic properties of glycosylated tetraphenylporphin derivatives
Spectrophotometric study of basic properties of glycosylated tetraphenylporphin derivatives Open
The paper presents the results of spectrophotometric study of the basic properties of glycosylated substituted derivatives of 5,10,15,20-tetraphenylporphyrin, namely 5-(4′- O -galactosylphenyl)-10,15,20-tris( N -methylpyridin-3-yl)porphine…
View article: Chemosensoric properties of porphyrin analogues ionized forms by spectrophotometry and quantum chemistry: 5,10,15,20-tetraphenyl-21-thia- and 5,10,15,20-tetraphenyl-21,23-dithiaporphyrins
Chemosensoric properties of porphyrin analogues ionized forms by spectrophotometry and quantum chemistry: 5,10,15,20-tetraphenyl-21-thia- and 5,10,15,20-tetraphenyl-21,23-dithiaporphyrins Open
Modification of porphyrins by a replacement of N atom(s) with a heteroatom(s), resulted in so called heteroporphyrins, exhibits interesting physicochemical properties. In this work, the spectral properties of ions and neutral forms of 5,10…
View article: FORMATION OF J-AGGREGATES OF THE 21-THIA-5,10,15,20-TETRA-(4-SULFONATOPHENYL)-PORPHYRIN IN WATER SOLUTIONS
FORMATION OF J-AGGREGATES OF THE 21-THIA-5,10,15,20-TETRA-(4-SULFONATOPHENYL)-PORPHYRIN IN WATER SOLUTIONS Open
The formation of J-aggregates of 21-thia-5,10,15,20-tetra-(4-sulfonatophenyl)-porphyrin in acidified water solutions is herein revealed for the first time and their spectral-luminescent properties are measured. It is shown that the spectra…
View article: SPECTRAL-LUMINESCENT PROPERTIES OF THE 21-THIA-5,10,15,20-TETRA-(4-SULFONATOPHENYL)-PORPHYRIN: ROLE OF HETEROSUBSTITUTION AND HALOCHROMISM
SPECTRAL-LUMINESCENT PROPERTIES OF THE 21-THIA-5,10,15,20-TETRA-(4-SULFONATOPHENYL)-PORPHYRIN: ROLE OF HETEROSUBSTITUTION AND HALOCHROMISM Open
The comparative study of the spectral-luminescent properties of hydrophilic 21-thia-5,10,15,20-tetra-(4-sulfonatophenyl)-porphyrin and 5,10,15,20-tetra-(4-sulfonatophenyl)-porphyrin is carried out in solutions at 293 K. The peculiarities o…
View article: Synthesis and Acid-Base Properties of TetraphenylporphineDerivatives with Amino Acid “Anchor” Groups
Synthesis and Acid-Base Properties of TetraphenylporphineDerivatives with Amino Acid “Anchor” Groups Open
Asymmetrically substituted 5,10,15,20-tetraphenylporphyrin derivatives such as 5-(4-aminophenyl)10,15,20-triphenylporphine, 5-[4-(tyrosinylamino)phenyl]-10,15,20-triphenylporphine and 5-{4-[(N-tert-butoxycarbonyltyrosinyl)amino]phenyl}-10,…
View article: AGGREGATION OF MS-MONOPYRIDYL-Β-OCTAALKYLPORPHYRINS IN DICHLOROMETHANE IN PRESENCE OF Pd(II)
AGGREGATION OF MS-MONOPYRIDYL-Β-OCTAALKYLPORPHYRINS IN DICHLOROMETHANE IN PRESENCE OF Pd(II) Open
Aggregation of 13,17-diethyl-2,3,7,8,12,18-hexamethyl-5-(pyridin-4-yl) porphyrin (I), 13,17-diethyl-2,3,7,8,12,18-hexamethyl-5-(pyridin-3-yl)porphyrin (II) and 13.17-diethyl-2,3,7,8,12,18-hexamethyl-5-(pyridin-2-yl)porphyrin (III) in the p…
View article: FLUORESCENT PROPERTIES OF PHENYL - CONTAINING ISOMERS OF PALLADIUM COMPLEXES OF OCTAETHYLPORPHIN IN ACETONITRILE
FLUORESCENT PROPERTIES OF PHENYL - CONTAINING ISOMERS OF PALLADIUM COMPLEXES OF OCTAETHYLPORPHIN IN ACETONITRILE Open
The fluorimetric measurements of the acetonitrile solutions of palladium complexes of the octaethylporphyrin, 5,10- biphenyl octaethylporphyrin and 5,15-biphenyl octaethylporphyrin at 293 K were performed. Tetraphenylporfin was used in tol…
View article: THE INFLUENCE OF LASER EXPOSURE ON THE STATE OF HARDENED HIGH-SPEED STEEL Р6М5
THE INFLUENCE OF LASER EXPOSURE ON THE STATE OF HARDENED HIGH-SPEED STEEL Р6М5 Open
ВЛИЯНИЕ ЛАЗЕРНОГО ВОЗДЕЙСТВИЯ НА
View article: Spectral and Acid-Base Properties of Tetra-Meso-Alkyl-and Tetra-Meso-Phenyl Substituted Derivatives of Porphyrin
Spectral and Acid-Base Properties of Tetra-Meso-Alkyl-and Tetra-Meso-Phenyl Substituted Derivatives of Porphyrin Open
Исследованы основные и спектральные свойства серии мезо-замещенных порфиринов с алкильными и арильными заместителями.Квантово-химические расчеты структуры мезо-замещенных порфиринов выполнены в приближении DFT (гибридный функционал B3LYP).…
View article: Synthesis and Acid-base Properties of Isomeric Tetrachlorooctabromo- and Tetrabromooctachlorotetraphenylporphyrins
Synthesis and Acid-base Properties of Isomeric Tetrachlorooctabromo- and Tetrabromooctachlorotetraphenylporphyrins Open
Reactions of Co(II)-5,10,15,20-tetra(4-bromophenyl)porphyrin chlorination with excess of the thionyl chloride and Co (II)-5,10,15,20-tetra(4-chlorophenyl)porphyrin bromination with N-bromosuccinimide were investigated.Co (II)-2,3,7,8,12,13…
View article: Effect of the Structure of the meso-Alkyl Substituent on the Physicochemical and Coordination Properties of the Porphyrin Ligand
Effect of the Structure of the meso-Alkyl Substituent on the Physicochemical and Coordination Properties of the Porphyrin Ligand Open
The acid-base and coordination properties for the series of meso-alkyl substituted porphyrins were studied spectrophotometrically: 5,10,15,20-tetrabutylporphyrin (H 2 (n-Bu) 4 P), 5,10,15,20-tetra-iso-butylporphyrin (H 2 (i-Bu) 4 P), 5,10,…
View article: The influence of hydrothermal activity during the origin of Co-rich manganese crusts of the N-W Pacific
The influence of hydrothermal activity during the origin of Co-rich manganese crusts of the N-W Pacific Open
The distribution of cobalt, vanadium, cadmium and molybdenum in the mineral fractions of the Co-rich manganese crusts (CMC) from Zubov and Govorov Guyots is considered. It is shown that the concentrations of cobalt in the ferrous fraction,…
View article: INFLUENCE OF LIGANDS BASICITY ON COMPLEXATION KINETICS OF 5,10,15,20-TETRA(TRIFLUOROMETHYL)PORPHYN AND 5,10,15,20-TETRA(ISO-BUTYL)PORPHYN WITH COPPER ACETATE
INFLUENCE OF LIGANDS BASICITY ON COMPLEXATION KINETICS OF 5,10,15,20-TETRA(TRIFLUOROMETHYL)PORPHYN AND 5,10,15,20-TETRA(ISO-BUTYL)PORPHYN WITH COPPER ACETATE Open
Spectrophotometric studies of base and complexation properties of 5,10,15,20-tetra(trifluoromethyl)porphine and 5,10,15,20-tetra(iso-butyl)porphine were carried out in systems acetonitrile – HClO4 and CH3COOH – Cu(ОАc)2. It was found that …
View article: SPECTROPHOTOMETRIC STUDY OF ACID-BASE PROPERTIES OF SPATIAL-DISTORTED DERIVATIVES OF PORPHYRINS IN ACETONITRILE
SPECTROPHOTOMETRIC STUDY OF ACID-BASE PROPERTIES OF SPATIAL-DISTORTED DERIVATIVES OF PORPHYRINS IN ACETONITRILE Open
Spectrophotometric titration method was used to study the acidic properties of: 5,10,15,20-tetrakis(thienyl-2-yl)-2,3,7,8,12,13,17,18-octaethylporphyrin (I), 5,10,15,20-tetrakis(4’-t-butylphenyl)-2,3,7,8,12,13,17,18-octaethylporphyrin (II)…
View article: THERMODYNAMICS OF 4-TERT-BUTYLCALIX[4]ARENE COMPLEXATION WITH SOME SOLVENTS
THERMODYNAMICS OF 4-TERT-BUTYLCALIX[4]ARENE COMPLEXATION WITH SOME SOLVENTS Open
In given paper the thermodynamics of 4-tert-butylcalix[4]arene complexation with methanol, ethanol, isopropanol, tert-butanol, n-hexane, dichloromethane, chloroform, carbon tetrachloride, dimethyl sulfoxide and dimethylformamide was studie…
View article: SYNTHESIS, COORDINATION AND ACID-BASE PROPERTIES OF MESO-DINITROSUBSTITUTED DERIVATIVES OF 5,15-DIPHENYL-β-OCTAALKYLPORPHINE
SYNTHESIS, COORDINATION AND ACID-BASE PROPERTIES OF MESO-DINITROSUBSTITUTED DERIVATIVES OF 5,15-DIPHENYL-β-OCTAALKYLPORPHINE Open
Presented work shows results of synthesis and spectrophotometric researches on properties of meso-dinitrosubstituted derivatives of 5,15-diphenyl-β-octaalkylporphyrin nitroderivatives in comparison with 2,8,12,18,3,7,13,17-octaethylporphyr…
View article: Halogenation of b-Positions in Со(II)-Tetraphenylporphyrins
Halogenation of b-Positions in Со(II)-Tetraphenylporphyrins Open
Исследованы реакции бромирования и хлорирования 5,10,15,20-тетрафенилпорфирината Со(II) с помощью N-бромсукцинимида и N-хлорсукцинимида в смеси хлороформ -диметилформамид.Синтезированы β-октаброми октахлорзамещенные порфиринаты Со(II) и Со…
View article: Influence of the Ligand’s Basicity on the Kinetics of Complexation of 5,10,15,20-Tetra(trifluoromethyl) and 5,10,15,20-Tetra(iso-butyl)porphine with Copper Acetate
Influence of the Ligand’s Basicity on the Kinetics of Complexation of 5,10,15,20-Tetra(trifluoromethyl) and 5,10,15,20-Tetra(iso-butyl)porphine with Copper Acetate Open
Проведены спектрофотометрические исследования основных и комплексообразующих свойств 5,10,15,20-тетра(трифторметил)порфина и 5,10,15,20-тетра(изо-бутил)порфина в системах ацетонитрил-HClO 4 и CH 3 COOH-Cu(ОАc) 2 .Установлено, что при титро…
View article: INVESTIGATION OF COORDINATION PROPERTIES OF 5,10,15,20-TETRA(4-OH-PHENYL) PORPHYRIN IN ACETONITRILE AND DIMETHYLFORMAMIDE
INVESTIGATION OF COORDINATION PROPERTIES OF 5,10,15,20-TETRA(4-OH-PHENYL) PORPHYRIN IN ACETONITRILE AND DIMETHYLFORMAMIDE Open
In the present work the reactions of basic interaction of 5,10,15,20-tetra(4-OH-phenyl) porphyrin in acetonitrile with the perchloric acid are studied by the method of spectrophotometric titration. And the chemical kinetics of ligand with …