Correlations between electrochemical and spectral properties of alkyl-substituted diphthalocyanine lanthanide complexes

The electrochemical behavior and spectral properties of a series of symmetrical 2,3,9,10,16,17,23,24,2’,3’,9’, 10’,16’,17’,23’,24’-hexadecaalkyl-substituted lanthanide complexes (R₈Pc)₂Ln (R = H, Me, Et, Buⁿ; Ln = Eu, Dy, Lu) were studied. Regularities of changing the parameters under study were established, depending on the nature of lanthanide and substituents in the phthalocyanine macroligands. The position of the intervalence band of the complexes in the near-IR region depends on the effective distance between the macroligands and also on the electronic effect of the substituents. Correlations between the electrochemical and spectral properties of the complexes were found.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 184–189, January, 2005.     

Preparation of Aqueous Colloidal Dispersion of C<Subscript>60</Subscript> Fullerene

A method for preparing aqueous colloidal dispersions of C₆₀ fullerene free of organic solvents is proposed. The size of dispersed particles is determined using the turbidity spectra. A solvatochromic effect is observed upon the addition of a C₆₀ solution in toluene to a water-acetone mixture.__________Translated from Kolloidnyi Zhurnal, Vol. 67, No. 4, 2005, pp. 575–576.Original Russian Text Copyright © 2005 by Tseluikin, Tolstova, Gun’kin, Pankst’yanov.     

Polythermic Section B<Subscript>4</Subscript>C-LaB<Subscript>6</Subscript> in the Ternary System La-B-C

The interaction was studied and the polythermic section B₄C-LaB₆ was constructed for the ternary system La-B-C described by a eutectic phase diagram.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 2, 2005, pp. 338–340.Original Russian Text Copyright © 2005 by Ordan’yan, Yurchenko, Vikhman.     

Interactions in the Silver Selenide-Water System

Interactions in the Ag₂Se-H₂O system in the whole pH range was studied by thermodynamic calculations and polarization measurements. Refined Pourbaix diagrams at 25 and 80°C were constructed.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 1, 2005, pp. 55–58.Original Russian Text Copyright © 2005 by Petrov, Belen’kii.     

Photoinduced Transformations in Low-Temperature Matrices Containing Radical Cations of Organotin Compounds

Charge transfer to matrix molecules was found to be the principal photochemical reaction of the radical cations Me₄Sn^+· and Me₆Sn ₂ ^+· . It was shown that the difference in the localization of positive charge in the ground state of these radical cations (at the Sn-C bond in Me₄Sn^+· and at the Sn-Sn bond in Me₆Sn ₂ ^+· ) did not affect the pathways of their photochemical reactions.__________Translated from Khimiya Vysokikh Energii, Vol. 39, No. 4, 2005, pp. 267–274.Original Russian Text Copyright © 2005 by Belokon’, Pergushov, Tyurin, Egorov, Mel’nikov.     

Synthesis of Amphiphilic <Emphasis Type="Italic">N</Emphasis>-Vinylpyrrolidone and Acrylamide Polymers of Various Structures

Amphiphilic polymers of N-vinylpyrrolidone (M _n = 1100–11 000) and acrylamide (M _n = 2000–8000) with the terminal n-octadecyl group were prepared.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 822–826.Original Russian Text Copyright © 2005 by Kuskov, Shtil’man, Tsatsakis, Torchilin, Yamskov.     

Electrotransport Properties of Ceramics Based on Bi<Subscript>4</Subscript>V<Subscript>2 − <Emphasis Type="Italic">x</Emphasis></Subscript>Fe<Subscript>x</Subscript>O<Subscript>11 − <Emphasis Type="Italic">x</Emphasis></Subscript>

Conditions for the formation of single-phase compounds in the synthesis of solid solutions Bi₄V_{2 − x} Fe_xO_{11 − x} are studied. The sequence of phase transitions is determined. Parameters of unit cells of solid solutions are determined. The net conductance as a function of temperature and composition is studied.__________Translated from Elektrokhimiya, Vol. 41, No. 5, 2005, pp. 607–609.Original Russian Text Copyright © 2005 by Emel’yanova, Buyanova, Zhukovskii.     

Cyclomagnesation of Olefins with Ethylmagnesium Bromide in the Presence of Titanium Complexes

Cyclomagnesation of terminal and cyclic olefins and 1,2-dienes with RMgHlg and R₂Mg in the presence of dichloro(dicyclopentadienyl)titanium(IV) gives non-Grignard cyclic and acyclic organomagnesium compounds. The reaction direction depends on the structure of unsaturated initial compound. The most probable reaction mechanism is discussed.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 3, 2005, pp. 363–368.Original Russian Text Copyright © 2005 by Dzhemilev, D’yakonov, Khafizova, Ibragimov.     

Reaction of the Intermetallic Compound SmFe11Ti with Gaseous Ammonia

The reaction of the intermetallic compound SmFe₁₁Ti with ammonia at the initial NH₃ pressure of 0.6 – 0.8 MPa in the temperature range 150 – 450 °C in the presence of 10 wt % NH₄Cl as activator was studied. Depending on the reaction temperature, SmFe₁₁Ti undergoes both hydrogenation to form a hydride phase of the starting intermetallic compound and disproportionation to form a hydride phase of a new intermetallic compound. The reaction products are finely dispersed powders. The magnetic properties of the products were studied.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 6, 2005, pp. 881–885.Original Russian Text Copyright © 2005 by Fokin, Shul’ga, Tarasov, Fokina, Korobov, Burlakova, Shilkin.     

Reaction of Graphite with Sulfuric Acid in the Presence of KMnO<Subscript>4</Subscript>

The reaction of graphite with sulfuric acid in the presence of KMnO₄ (oxidant : graphite ratio 0.027–0.55) involves consecutive and concurrent reactions: graphite intercalation and direct oxidation of the carbon matrix. The properties of graphite bisulfate and its reaction products are determined by the stage number of the intercalation compound; the decomposition enthalpies of the stage I–IV graphite bisulfate correlate with the enthalpies of graphite intercalation with sulfuric acid.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 2, 2005, pp. 184–191.Original Russian Text Copyright © 2005 by Sorokina, Khaskov, Avdeev, Nikol’skaya.     

Photoinduced Chemiluminescence in 9-Anthrone Solution

Interaction of a photoirradiated anthrone solution in dioxane with an aqueous base solution (0.1 mol l⁻¹ NaHCO₃) was accompanied by chemiluminescence. The product possessing chemiluminescent activity was accumulated in the solution within three hours of continuous UV irradiation (λ_max ∼ 365 nm). It was retained in the solution within several days after irradiation. This product was supposed to be dianthrol. The maximum of the chemiluminescence spectrum is at 540–555 nm, which shows that the chemiluminescence emitter is the anthrol anion.__________Translated from Khimiya Vysokikh Energii, Vol. 39, No. 4, 2005, pp. 255–258.Original Russian Text Copyright © 2005 by Tsaplev, Vasil’ev.     

Effect of Fullerene C60 on Structuring of Toluene

Toluene solutions of fullerene C₆₀ with concentrations of 0.001, 0.01, and 0.2 wt % were studied by small-angle X-ray diffraction analysis. The radii of gyration of scattering elements were determined from the small-angle diffraction patterns plotted in the Guinier coordinates.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 6, 2005, pp. 1047–1049.Original Russian Text Copyright © 2005 by Ginzburg, Tuichiev, Tabarov, Lavrent’ev, Melenevskaya, A. Pozdnyakov, O. Pozdnyakov, Shepelevskii, Shibaev.     

Structure of the Potassium Hydroxide-Dibenzo-18-crown-6 Complex

Dibenzo-18-crown-6 reacts with potassium hydroxide in methanol to give the C₂₀H₂₄O₆ ⋅ KOH ⋅ MeOH complex which was characterized by the ¹H NMR, UV, and IR spectra. Depending on the conditions, the reaction of the same compounds in toluene gave products with the compositions 4 C₂₀H₂₄O₆ ⋅ KOH ⋅ 3 H₂O (3 h, reflux) and 11C₂₀H₂₄O₆ ⋅ KOH (1 h, 80°C, 1 h).__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 4, 2005, pp. 620–625.Original Russian Text Copyright © 2005 by Nosyreva, Mal’kina, Sinegovskaya, Trofimov.     

Macroheterocyclic Compounds with p-Diamines of the Diaryl Series

The reactions of indane-1,3-dione with 4,4′-diaminodiphenyl sulfone, 4,4′-diaminodiphenyl sulfide, and 4,4′-diaminodiphenyl ether were used to synthesize symmetrical macroheterocyclic compounds.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 6, 2005, pp. 1017–1021.Original Russian Text Copyright © 2005 by Berezina, Vorob’ev, Vorob’eva, Sadova.     

Influence of Surfactants on Structuring of Molding Blends Based on ZnO

The correlation between the surfactant sorption and structural mechanical properties of molding blends and granulated sorbents was studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 2, 2005, pp. 240–244.Original Russian Text Copyright © 2005 by Prokof’ev, Il’in, Basova.     

N,N′-Bis(trimethylsilylmethyl)thiocarbamide and N,N′-Bis(trimethylsilylmethyl)-λ6-thiocarbamide S,S-Dioxide

N,N′-Bis(trimethylsilylmethyl)-λ⁶-thiocarbamide S,S-dioxide was synthesized by oxidation of N,N′-bis(trimethylsilylmethyl)thiocarbamide with hydrogen peroxide. The synthesized dioxide is a less active reducing agent than previously studied S,S-dioxides of organosilicon thiocarbamides in which the silicon atom is separated from the thiocarbamide fragment by a -CH₂CH₂CH₂- bridge.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 6, 2005, pp. 912–914.Original Russian Text Copyright © 2005 by Vlasova, Grigor’eva, Voronkov.     

Alkylammonium and Alkylimidazolium Perhaloborates,Phosphates, and Aluminates as Catalysts in the Biginelli Reaction

Tri- and tetraalkylammonium, 1,3-dialkylimidazolium, and 1,2,3-trialkylimidazolium salts with BF ₄ ⁻ , PF ₆ ⁻ , AlCl ₄ ⁻ , and Al₂Cl ₇ ⁻ as counterions catalyze the Biginelli reaction, ensuring preparation of various 3,4-dihydropyrimidin-2(1H)-one and 3,4-dihydropyrimidine-2(1H)-thione derivatives in high yields in the absence of a solvent.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 4, 2005, pp. 524–528.Original Russian Text Copyright © 2005 by Putilova, Kryshtal’, Zhdankina, Troitskii, Zlotin.     

Superacids Based on Zirconium Dioxide

The synthesis of the superacidic materials SO ₄ ²⁻ /ZrO₂ and WO₃/ZrO₂ is examined. The structure of their acidic centers and their activity in the isomerization and acylation of hydrocarbons are discussed.__________Translated from Teoreticheskaya i Eksperimental’naya Khimiya, Vol. 41, No. 3, pp. 156–165, May–June, 2005.     

Phase Transitions,Thermal Desorption of Gases,and Electroconduction in BaCeO<Subscript>3</Subscript>, a Base for High-Temperature Protonic Conductors

Investigations of phase transitions in barium cerate are carried out by methods of dilatometry and differential scanning calorimetry. Thermal desorption of gases and temperature dependences of electroconduction in dry and humid air are studied. Barium cerate exhibits complex polymorphism, undergoing a number of structural conversions at 300– 1300 K. The peaks in the spectra of thermal desorption of CO₂ and H₂O correlate with variations in the crystal lattice. Structural changes in BaCeO₃ affect activation energies for the carrier transport and the shares of partial conductivities.__________Translated from Elektrokhimiya, Vol. 41, No. 5, 2005, pp. 620–626.Original Russian Text Copyright © 2005 by Kuz’min, Gorelov, Vaganov, Korzun, Kazantsev, Aksenova, Khromushin.     

Determination of Esters in Motor and Industrial Oils by IR Spectrometry

IR spectra of mixtures of mineral oil and isopropyl myristate modeling motor oils with different concentrations of esters were studied. A relationship between the absorption band intensities at 1737, 1180, and 1110 cm⁻¹ and the ester concentration in the oil was revealed. A procedure was proposed for the determination of esters in motor oils by IR spectrometry (c _min = 1%; RSD ≤ 8.6%). The procedure was tested on several commercially available samples of lubricants (RSD ≤ 12%).__________Translated from Zhurnal Analiticheskoi Khimii, Vol. 60, No. 8, 2005, pp. 811–814.Original Russian Text Copyright © 2005 by Gol’eva, Rudnev, Pisanov.