Russian Journal of General Chemistry 

About: Russian Journal of General Chemistry is an academic journal published by MAIK Nauka/Interperiodica. The journal publishes majorly in the area(s): Chemistry & Catalysis. It has an ISSN identifier of 1070-3632. Over the lifetime, 9999 publications have been published receiving 34524 citations.

Specific Features of BiFeO3 Formation in a Mixture of Bismuth(III) and Iron(III) Oxides

Abstract: Active formation of BiFeO3 was observed at temperatures exceeding the temperature limit of its stability. The process mechanism was elucidated.

New Reagents for Determination of the Quantum Efficiency of Singlet Oxygen Generation in Aqueous Media

Abstract: Water-soluble anthracene derivatives containing carboxy, dihydroxyphosphinyl, or pyridinium fragments bound via methylene groups to 9- and 10-carbon atoms were prepared, and their spectra, solubility, and reactivity toward singlet oxygen were studied. Using sodium α,α'-(anthracene-9,10-diyl)bis(methyl- malonate) as acceptor, it is possible to determine the quantum efficiency of singlet oxygen generation in aqueous solutions and in microheterogeneous media in the presence of biomacromolecules.

Oxidation of aniline with strong and weak oxidants

Abstract: Oxidative polymerization of aniline by the action of a strong oxidant, ammonium peroxodisulfate, and a weak oxidant, silver nitrate, was studied in media with different acidities. Depending on the reaction conditions, the organic fraction of the products contained either nonconducting aniline oligomers or conducting high-molecular polyaniline. The effect of the oxidation potential on the oxidation process and formation of supramolecular structures by oxidation products was discussed on the basis of analysis of the kinetics and products of aniline oxidation by spectroscopic, conductometric, thermogravimetric, chromatographic (gel permeation), and electron microscopic methods. A relation was revealed between the morphology of composite materials and their electric conductivity.

Generation of singlet oxygen with anionic aluminum phthalocyanines in water

Abstract: The dependence of the quantum yield of photogeneration of singlet oxygen with aluminum sulfophthalocyanines on the degree of their sulfonation was studied. Experiments showed that Fotosens preparation containing, on the average, about three sulfo groups in the macroring in aqueous buffer solution (pH 7.4) exists in the monomeric form and sensitizes singlet oxygen with a quantum yield ϕΔ 0.42±0.06. Aluminum tetra-4-sulfophthalocyanine forms dimers, and correspondingly ϕΔ is lower: 0.22±0.03. Sulfonated aluminum phthalocyanine containing, on the average, about two sulfo groups in the macroring is aggregated to a significant extent. Addition of Triton X-100 detergent results in partial deaggregation of the dye, and ϕΔ increases from ∼0.01 to 0.15±0.02. In the series including previously unknown aluminum phthalocyanines containing residues of phosphonic acids or their esters, and also aluminum and zinc octacarboxyphthalocyanines, the influence of the dye structure on the quantum yield of generation of singlet oxygen suggests participation of axial hydroxy groups in associate formation. These associates are not manifested spectroscopically and generate singlet oxygen inefficiently. The quantum yields ϕΔ for the monomers and associates are 0.3 and 0.1, respectively.

Reaction of Graphite with Sulfuric Acid in the Presence of KMnO4

Abstract: 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.