Physics of a high-frequency electrodeless discharge in argon at atmospheric pressure

Electron concentration, excitation temperature, and ionization temperature are determined as functions of radius for a cylindrical discharge. The results are compared with published data for inductively coupled discharges.     

Principles of the Construction of Polymer Structures,Heteronuclear (13C, 15N) CP-MAS NMR,and Thermal Behavior of Heteroleptic Bismuth(III) Complexes of the General Composition [Bi(S2CNR2)2X] (X = NO3, Cl)

Russian Journal of Coordination Chemistry - The crystalline heteroleptic bismuth(III) complexes, [Bi{S2CN(iso-C4H9)2}2(NO3)] (I) and [Bi{S2CN(C3H7)2}2Cl] (II), are isolated in preparative yields....     

Exact low-order classical moments in collision-induced bands by linear rotors: CO2-CO2

Exact and general analytic expressions are reported for the integrated intensity and the width of collision-induced absorption (CIA) and collision-induced scattering (CIS) bands by gases of centrosymmetric linear molecules. These expressions provide significant insight and allow assignment of partial second moments to the degrees of freedom of the colliding molecules. The expressions are applied to ambient CO(2), whose collisional spectra are reputed to be useful probes for terrestrial and planetary atmospheres. Compelling evidence of the substantial role of hitherto missing polarization and polarizability mechanisms is provided and is in remarkable agreement with experimental observation. Our findings allow the long-overdue simple interpretation of CIA and CIS by CO(2)-CO(2) without the need to resort to short-range interactions to offset the discrepancies between theory and experiment.     

Phase Equilibria of Three-Component Reciprocal System Na,K║I,MoO<Subscript>4</Subscript>

The three-component reciprocal system Na,K║I,MoO₄ has been studied by differential thermal analysis (DTA). The compositions and melting temperatures have been determined, and the enthalpies of melting of eutectic mixtures measured. Phase equilibria in the system are described, and phase fields are demarcated.     

Photoswitchable Phosphonate–Fullerene Hybrids with Cholinesterase Activity

Modern progress in photopharmocology calls for new generation of compounds joining bioactivity, photoswitchable properties and high selectivity of response to light wavelength. Introduced here, phosphonate–fullerene hybrids are the first representatives of such compounds. Phosphonate–fullerene hybrids were synthesized on a base of fullerene C₆₀ and organophosphates with the function of photoswitchable cholinesterase activity—phosphorylated thiazolotriazole and aminomalonate compounds and studied with FTIR, UV–VIS spectroscopy and IPC-micro neurotoxin amperometric analysis. As a result of spectroscopic and bioactivity characterization, it was not only demonstrated butyrylcholinesterase (BuChE) inhibition increase in phosphonate–fullerene hybrids compared with pure phosphonates but also pronounced response of inhibition degree to laser irradiation of hybrids. It was found opposite behavior of hybrids as a result of laser irradiation—BuChE inhibition drop-off for thiazolotriazole–fullerene and pronounced growth for aminomalonate–fullerene. The other remarkable peculiarity of presented phosphonate–fullerene hybrids is high selectivity of inhibition change degree to laser wavelength (266 or 325 nm).     

Which Metals are Green for Catalysis? Comparison of the Toxicities of Ni,Cu, Fe,Pd, Pt,Rh, and Au Salts

Environmental profiles for the selected metals were compiled on the basis of available data on their biological activities. Analysis of the profiles suggests that the concept of toxic heavy metals and safe nontoxic alternatives based on lighter metals should be re‐evaluated. Comparison of the toxicological data indicates that palladium, platinum, and gold compounds, often considered heavy and toxic, may in fact be not so dangerous, whereas complexes of nickel and copper, typically assumed to be green and sustainable alternatives, may possess significant toxicities, which is also greatly affected by the solubility in water and biological fluids. It appears that the development of new catalysts and novel applications should not rely on the existing assumptions concerning toxicity/nontoxicity. Overall, the available experimental data seem insufficient for accurate evaluation of biological activity of these metals and its modulation by the ligands. Without dedicated experimental measurements for particular metal/ligand frameworks, toxicity should not be used as a “selling point” when describing new catalysts.     

Analysis of the Crystallogeometry of Tetragonal Martensite in Indium‒Cadmium Alloys by the Method of Electron Back-Scattering Diffraction

Doklady Physics - Electron back-scattering diffraction shows that a package structure consisting of colonies of tetragonal lamella plates is formed when cooled below the temperature of the...     

Synthesis of substituted 3,4-dihydrofuro[2,3-d]pyrimidines from 3-arylmethylidenefuran-2(3H)-ones

Russian Journal of Organic Chemistry -     

Dependence of electron beam generation in an open discharge on the discharge gap configuration and gas pressure

Experimental investigation into an electron beam generator based on an open continuous discharge is carried out at different pressures of air and helium. The current-voltage characteristics of the discharge are taken at different geometrical parameters of the discharge gap.