Relativistic shift of the linear Zeeman effect

The efficiency with which a magnetic field acts on sublevels of the first and second doublets of a hydrogen-like atom is shown to vary because of relativistic effects by a factor of 1 ? 2γ(l + 1)/(2l + 3) and 1 ? 2γl/(2l ? 1), respectively, where γ is the ratio of the electron binding energy to the rest energy and l is the quantum number of the orbital angular momentum.     

Synthesis of perfluoroheptanal by ozonolysis of perfluoro-1-octene

Perfluoro-1-octene was used as a model for developing a method for the preparative ozonolysis of perfluoro-1-alkenes to the corresponding perfluoro-nor-alkenals. Perfluoroheptanal was synthesized.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1146–1147, June, 1994.     

Lattice rearrangement induced by excitons in cryocrystals

Experiments on permanent lattice-defect formation induced by electronic excitation of rare-gas solids are presented. The creation of triplet excitons Γ(3/2) is found to be the primary process, followed by the exciton self-trapping. Probable models of defect formation are discussed. Fiz. Tverd. Tela (St. Petersburg) 40, 903–906 (May 1998) Published in English in the original Russian journal. Reproduced here with stylistic changes by the Translation Editor.     

Conducting electrically active films obtained by the electrochemical oxidation of aniline in molten electrolytes and concentrated hydrochloric acid

The feasibility of obtaining electrically conducting and active films by the electropolymerization of aniline in butylpyridinium tetrachloroaluminate or hexachlorodialuminate as the medium has been demonstrated. Identical voltamperometric characteristics with a potential peak of 0.5 V were found in these films and the compound formed upon the electrochemical polymerization of aniline in 20% hydrochloric acid.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 212–214, January, 1991.     

Electrophysical and photophysical properties of films made from an azobenzene-functionalized polymeric cobalt complex

Electric conductivity, photoconductivity, and electro-and magneto-optical properties of films from a novel polymeric complex of 4-methacryloyloxy-(4′-carboxy-3′-hydroxy)azobenzene with cobalt were studied. Electric conductivity and visible photoconductivity are determined by the orientation effects of azobenzene groups and by charge-carrier generation and transport in the polymer films. A change in the spatial orientation of the photoinduced dipole moments of azobenzene groups in an external electric or magnetic field is accounted for by the appearance of forces acting on charged magnetic metal ions that are rigidly bound to these fragments.     

Kinetic model ofCO oxidation on nonuniform surface analyzed regardingCOads spillover, 2. homotopic method. Effect ofm1 surface portion

The homotopic method has been used to analyze the kinetic model of three-stageCO oxidation on two nonuniform surface patches conjugated byCO ₂ spillover. Diagrams of steady states depending on the portion of surface patchm ₁ at various temperatures and pressure ratiosP(O ₂)/P(CO) have been constructed. The ratios of different type patches corresponding to the maximum overall reaction rate have been found.     

Self-oscillations in the rate of CO oxidation on Pt(110)

The surface of Pt(110) was found to be metastable under the reaction conditions. The necessary condition for the appearance of self-oscillations in the system is the change of platinum surface properties under the action of reaction medium. Self-oscillations in the rate are maintained due to reversibility of these changes.

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, Pt(110) . .

     

Reaction of <Emphasis Type="Italic">o</Emphasis>-Quinones in Cyclohexane Solutions with Alkyl Radicals Generated by Solution γ-Irradiation

The structures of products formed in reactions of tert-butylated o-quinones with alkyl radicals were determined by ¹H and ¹³C NMR and two-dimensional ¹H-¹H NOESY spectroscopy, and also by gas chromatography-mass spectrometry. The major products formed upon γ-irradiation of deaerated solutions of 4-tert-butyl-1,2-benzoquinone and 3,5-di-tert-butyl-1,2-benzoquinone in cyclohexane are monoalkyl ethers and products of addition to the C=C bond. In the case of 4-tert-butyl-1,2-benzoquinone, these are products of mixed O-C and C-C alkylation; the adduct formed by addition of the cyclohexyl radical to the C=C bond in 3,5-di-tert-butyl-1,2-benzoquinone gives an unsymmetrical dimer whose structure was proved by single-crystal X-ray diffraction.     

Kinetics of CO oxidation on the surface of heterophase catalysts. Modeling by the Monte Carlo method

The Monte Carlo method has been used to simulate CO oxidation on a lattice consisting of various alternating patches: M1, where s(CO)>s(O₂) and M2, where s(CO)2). The reaction is shown to proceed over all the surface at low temperature as CO_ads spillover from M1 to M2 and backwards.     

Kinetic model of CO oxidation on heterophase surface analyzed regarding COads spillover, I. Homotopic method. Effect of temperature and CO pressure

The homotopic method has been used to analyze the kinetic models of CO oxidation on two surface patches conjugated by CO_ads spillover. On each patch reaction proceeds via a three-stage mechanism but with different constants. The stability of steady-states solution has been studied. CO_ads spillover from one patch to another changes substantially the bifurcation picture of steady states and produces islands.