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[en] The results of studies on the structure and properties of the O2F2, Cl2O2, Br2O2 and I2O2 molecules and the FOO, ClOO and BrOO radicals obtained mainly in the past decade are surveyed. The bibliography includes 173 references.
Journal
Russian Chemical Reviews (Print); ISSN 0036-021X; 
; v. 71(2); p. 85-97
; v. 71(2); p. 85-97
[en] Highlights: • A novel surface regulation strategy is developed to modify BiOBr flowers. • More active imprinting sites are constructed on the surface of BiOBr. • The sugar molecule-regulated BiOBr exhibits an enhanced photocatalytic ability. -- Abstract: Bismuth oxybromide (BiOBr) is a representative bismuth photocatalytic material that has been extensively investigated and applied in photodegradation and photoelectrochemistry due to its unique layered structure. However, poor oxidative ability of photoexcited holes from BiOBr causes low degradation rate of refractory pollutants, such as phenol. Thus, developing a general strategy for regulating surface band structure and obtaining photoexcited holes with strong oxidative ability is necessary in BiOBr. We developed a novel surface regulation strategy of BiOBr in this study to obtain active imprinting sites for improving its photocatalytic activity. Various kinds of sugars are selected to regulate surface structures for obtaining the positive-surface valence band maximum of BiOBr and active hydroxyl imprinting sites and then improving photooxidative activities toward organic pollutants and strong photoelectric responses. Among them, maltose-regulated BiOBr with additional hydroxyl active sites exhibits the maximum photodegradation rate of phenol and methylene blue. The valence band of BiOBr was maximally increased after the surface recombination of sugar. This novel surface regulation strategy is a facile, general, and effective approach for improving the photocatalytic activity of BiOBr flowers to provide a new route for modifying surface structure of other photocatalysts and improving their activity.
Journal
[en] Extraction behaviour of rhenium (6) oxotetrabromides is studied. Aliphatic non-polar hydrocarbons are the best extractants of rhenium oxotetrabromide. Extraction behaviour of rhenium oxotetrabromide is discussed in the frameworks of hypothesis on the optimum electron structure of the compound extracted
[ru]
Journal
Zhurnal Neorganicheskoj Khimii; ISSN 0044-457X; ; v. 27(2); p. 457-461
; v. 27(2); p. 457-461
[en] Based on the analysis of the results of measurement of excitation spectra of steady luminescence and phosphorescence of LaOBr-Tb and LaOCl-Tb-phosphors it has been established that the forbidden zone widths of LaOBr and LaOCl are 5.8 and 6.0 eV, respectively. Excitation of the recombination afterglow and thermoluminescence of LaOBr-Tb by quanta with the energy of 3.4-3.5 eV which is especially vividly manifested in compounds obtained with NH4Br as a flux, is due to the stepwise two-quantum process of terbium excitation and ionization possible owing to the long lifetime of the transient excited state
Journal
Zhurnal Prikladnoj Spektroskopii; ISSN 0514-7506; ; v. 35(5); p. 806-811
; v. 35(5); p. 806-811
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