Materials Literature
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Abstract Pyrex-filtered photoirradiation with a high-pressure Hg lamp was performed for a thermally inert hydridocobalt(I) CoH[PPh(OEt)2]4 in the presence of some allylic compounds. Allyl benzoate and allyl phenyl ether showed the cleavage of allylic-O bonds to give propene in a stoichiometric quantity to the complex…
Abstract The NH 2 (X̃ 2 B 1 ) radical reactions with saturated hydrocarbons, toluene and acetaldehyde were investigated in an isothermal discharge flow system over the given temperature ranges. The pressure was varied between 2.6 and 7.8 mbar. Helium was used as the main carrier gas. The temperature dependences of the…
The average structure (CI) of a volcanic plagioclase megacryst with composition Ano, from the Hogarth Ranges, Australia, has been determined using three-dimensional, singlecrystal neutron and X-ray diffraction data. Least squaresr efinements, incorporating anisotropic thermal motion of all atoms and an extinction corr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of the cluster complex tris(1-cysteinethiolato)pentacopper(2+) perchlorate monohydrate, a mixed-valence copper-mercaptide speciesParimal K. Bharadwaj, Elizabeth John, Chuan Liang Xie, Dechun Zhang, David N. Hendrickson, Joseph A. Pot…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange interaction through hydrogen-bond bridges and the effect of a single-oxygen bridge. Crystal structures and magnetic susceptibilities of two binuclear copper(II) complexes of 2-amino-2-methyl-1-propanolHeikki MuhonenCite this: Inorg. Chem. 1986, 25, 26, 4692–4698Publ…
When crystals of N,N′,N″-trialkyl-1,3,5-benzenetricarboxamides with alkyl groups from pentyl to octadecyl are heated, viscous birefringent fluids are produced at temperatures between 40 and 120[ddot]C depending upon the alkyl chain length and they are transformed into optically isotropic liquids above 200[ddot]C. Tran…
We investigated populations of the diatom genus Didymosphenia from Lake Baikal, two localities in China, in Lake Karluk, Alaska, and in Lake Superior using quantitative shape analysis. Four different taxa were distinguished in the Lake Baikal material, two belonging to recognized species, and two of uncertain affiniti…
The charge distribution in orthoboric acid, B(OH)3, Mr=61.83, has been investigated experimentally using low-temperature X-ray diffraction data and theoretically by ab initio calculations. Crystal data at 105 K, triclinic, space group P1, a = 7.0187 (14), b = 7.035 (2), c=6.3472 (12) A, a =92.49 (12), /3-- 101.46 (2),…
During the production and usage of HV dc power cables with plastic insulating materials, formation of space charges in the insulating material has become a significant problem. Many studies on the formation of space charge in insulating materials have been conducted and these past and current Japanese studies are revi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleOn the glass transition and viscosity of phosphorus pentoxideS. W. Martin and C. A. AngellCite this: J. Phys. Chem. 1986, 90, 25, 6736–6740Publication Date (Print):December 1, 1986Publication History Published online1 May 2002Published inissue 1 December 1986https://pubs.acs.org…
Abstract Syntheses of ferric smectites were performed at low temperature (75° C by aging coprecipitated gels of silica and Fe 2+ -sulphate under initially reducing then oxidizing conditions. Under strictly reducing conditions only nuclei of a trioctahedral ferrous stevensite were observed and crystal growth did not ta…
Abstract Expanding and non-expanding layers of interstratified clay minerals have been examined by high-resolution transmission electron microscopy. Permanent expansion of swelling layers under the electron beam was achieved by intercalation of n -alkylammonium ions, especially the octadecylammonium ion. Oriented flak…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and Mechanism of the NOx Reduction with NH3 on V2O5 - WO3-TiO2 CatalystGerard Tuenter, Wlm F. van Leeuwen, and Leo SnepvangersCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 4, 633–636Publication Date (Print):December 1, 1986Publication History Published online…
Convergent beam diffraction patterns from a bcc blue-phase (I) monocrystal in an electric field applied in the [110] direction show this twofold axis transforming through an orthorhombic distortion to become, at a critical field, the fourfold axis of a tetragonal crystal. The implication on structures of blue phase I…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlatinum-titanium alloy formation from high-temperature reduction of a titania-impregnated platinum catalyst: implications for strong metal-support interactionBruce C. Beard and Philip N. RossCite this: J. Phys. Chem. 1986, 90, 26, 6811–6817Publication Date (Print):December…
Very fine fibers of 3,4,9,10-perylenetetracarboxylicdianhydride heated above 520 °C in argon (Ar) or argon/hydrogen (Ar/H2) gas were grown on pressed pellets. The fibers synthesized in Ar had a rectangular cross section of about 0.1–0.4 μm on a side with lengths up to 10 mm. By contrast, the fibers synthesized in Ar/H…
We consider the motion of the flattened bubbles which form when air is injected into a viscous fluid contained in the narrow gap between two flat, parallel plates which make up a conventional Hele-Shaw cell, inclined at an angle x to the horizontal. We present a number of qualitative observations on the formation and…
The lattice expansion of Pd during the absorption of hydrogen has been investigated with a combined technique in which the length changes and hydrogen concentration were measured simultaneously and on the same sample in the single-phase region of the PdH c phase diagram above the critical point. For atomic ratios up t…
In light of our high-resolution and almost simultaneous measurements of the tilt angle and polarization in the chiral-smectic-C phase of p-(n-decyloxybenzylidene)-p-amino-(2-methylbutyl)- cinnamate (DOBAMBC), we have proposed a generalized mean-field model to describe the important features related to the smectic-A--c…
Miorocrystalline cellulose stabilized emulsions (o/w) were evaluated by means of brightfield and polarized light microscopy, freeze-etch electron microscopy, droplet size analyses and rheologic measurements. These studies indicated that miorocrystalline cellulose (Avicel RC591 ) forms a network around emulsified oil d…