SYNTHESIS AND STRUCTURE OF PALLADACYCLOPENTADIENYL COMPLEX WITH ACENAPHTHENE-1,2-DIIMINE LIGAND

Journal of Structural Chemistry - The organometallic complex [Pd(dpp-bian)(C4(COOMe)4)]·(C2H5)2O (1·(C2H5)2O) is obtained by the interaction of [Pd2(dba)3]...     

The multi-functional aspect of scanning holographic microscopy: a review(Invited Paper)

Recent developments in scanning holographic microscopy that offer the prospects of new quantitative tools and imaging modalities in bio, micro, and nano sciences are reviewed. The versatility of the method is emphasized. Scanning holography can operate in an incoherent mode for fluorescence imaging, in a coherent mode for quantitative phase imaging, or in a tomographic mode for axial sectioning and rejection of the out-of-focus haze. Possible applications are illustrated with examples, and future prospects ...     

On the thermal stability of vacancy-carbon complexes in alpha iron

In this work we have summarized the available ab initio data addressing the interaction of carbon with vacancy defects in bcc Fe and performed additional calculations to extend the available dataset. Using an ab initio based parameterization, we apply object kinetic Monte?Carlo (OKMC) simulations to model the process of isochronal annealing in bcc Fe doped with carbon to compare with experimental data. As a result of this work, we clarify that a binding energy of ～0.65?eV for a vacancy-carbon (V-C) pair fits the available experimental data best. It is found that the V (2)-C complex is less stable than the V-C pair and its dissociation with activation energy of 0.55?+?0.49?eV also rationalizes a number of experimental data where the breakup of V-C complexes was assumed instead. From the summarized ab initio data, the subsequently obtained OKMC results and critical discussion, provided here, we suggest that the twofold interpretation of the V-C binding energy, which is believed to vary between 0.47 and 0.65?eV, depending on the ab initio approximation, should be removed. The stability and mobility of small and presumably immobile SIA clusters formed at stage II is also discussed in the view of experimental data.     

Nanocatalysts for photocatalytic air purification systems

Nanocatalysts containing platinum and palladium clusters have been synthesized on the basis of detonation nanodiamond, cubic silicon carbide, and titanium dioxide. Characteristic size of the Pt cluster was close to 4 nm on both nanodiamond (particle size 5 nm) and β-SiC (particle size 13 nm) supports. The catalysts show high catalytic activity in reactions of CO oxidation and photocatalytic oxidation of ethanol at room temperature and low concentrations (<100 mg m³). They are promising in photocatalytic air purification systems for domestic use.     

Synthesis and properties of a platinum catalyst supported on plasma chemical silicon carbide

A CO oxidation catalyst based on β–SiC and Pt nanoparticles has been synthesized and studied. The average size of Pt clusters on the surface of the plasma-chemical silicon carbide nanoparticles is close to 4 nm. It has been found that the rate of the CO oxidation reaction at low concentrations (100 mg/m³) in air at room temperature over the catalyst based on platinum and silicon carbide nanoparticles is 60–90 times that over a platinum black-based catalyst with a specific surface area of 30 m²/g. The Pt/SiC catalyst containing 12 wt % Pt has been found to provide the maximum CO oxidation rate.     

Electrochemical Regeneration of Polishing Electrolytes of Chromium-Containing Steels

A diaphragm-separated electrolysis method was used for regeneration of spent phosphoric-sulfuric acid solutions for electropolishing of chromium-containing steels (12Cr₁₈Ni₁₀Ti, 40Cr₁₃, and others). The process regime and the cathode materials were optimized.     

Estimates of the stability of the Runge-Kutta method for differential equations with variable operator

Questions of stability of difference schemes approximating differential eqtions with varying operator in a Banach space constructed by the Runge-Kutta method are studied.Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 43, No. 2, pp. 262–265, February, 1991.