Table of contents

Volume 81

Number 9, September 2012

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769

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The features of co-luminescence (sensitized luminescence) of lanthanide ions and dye molecules inserted in nanoparticles of complexes formed by trivalent metals with β-diketones are discussed. The mechanisms of energy transfer in these nanoparticles that lead to sensitization of Ln3+ ion luminescence and dye molecule fluorescence are considered. It is shown that the process of nanoparticle formation and their morphology in aqueous solutions can be studied by analyzing the mechanism of their co-luminescence and co-fluorescence. Examples of chemical, biological and medicinal applications of nanoparticles containing lanthanide ions and dye molecules with enhanced luminescence brightness are given. The bibliography includes 131 references.

790

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The published studies in a quickly developing field of research, gas-phase oxidative pyrolysis (oxidative cracking, oxidative dehydrogenation) of light alkanes, are systematized and analyzed. This process attracts researchers' attention due to the general enhancement of interest in the kinetics of homogeneous-heterogeneous processes of partial oxidation of hydrocarbons and also in view of the prospects for the design of new industrial processes based on light hydrocarbons as raw materials. The bibliography includes 87 references.

823

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More than 250 asymmetric catalytic reactions with enantioselectivity approaching 100% are considered. The dependences of the enantiomeric excess of the product on the symmetries of the initial catalytic complex and the key intermediate that provides the asymmetric induction and on the number of coordinating functional groups in the substrate molecule are analyzed. Based on the catalytic cycles of asymmetric reactions proposed in the literature, two possible mechanisms of asymmetric induction are discussed, consecutive (stepwise) and cooperative (one-step) mechanisms. The bibliography includes 283 references.

855

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The review presents the results of studies on autowave processes of filtration combustion in counterflow systems. Specific features of these processes are described. Considerable attention is paid to mathematical modelling of combustion waves in counterflow systems and to stability analysis of filtration combustion waves. Accompanying processes including pyrolysis, evaporation and condensation of both the initial components and combustion products are considered. The applicability of filtration combustion in counterflow systems in the technologies for energy production from low-grade fuels and various kinds of waste and for extraction of metals from nontraditional sources is discussed. The bibliography includes 129 references.