Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDioxygen complexes of rhodium porphyrinsBradford B. Wayland and Alan R. NewmanCite this: J. Am. Chem. Soc. 1979, 101, 21, 6472–6473Publication Date (Print):October 1, 1979Publication History Published online1 May 2002Published inissue 1 October 1979https://pubs.acs.org/doi/1…
Abstract Crystallinity degrees exert influence on the stability of high molecular weight poly(ethylene oxide)s, POE's, in solid state. It was found that the degradation of these POE's is connected with an increase of crystallinity degrees. Samples being prepared under the terms of the strontium carbonate initiated bul…
Gaseous carbides of uranium, UC, UC2, UC3, UC4, UC5, and UC6 have been observed in a mass spectrometric investigation of the Knudsen cell effusate from a thorium–uranium–rhodium–graphite system at high temperatures. Partial pressures of the carbide molecules were measured as a function of temperature in the 2300–2700°…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of hydrogen transfer from metal hydridesR. J. Klingler, K. Mochida, and J. K. KochiCite this: J. Am. Chem. Soc. 1979, 101, 22, 6626–6637Publication Date (Print):October 1, 1979Publication History Published online1 May 2002Published inissue 1 October 1979https://pub…
A computer program POWLS for refinement of crystal structures and magnetic structures from X-ray or neutron diffraction powder diagrams is reported. The program uses integrated intensities as the observed quantities. It is highly flexible.
Abstract Solid acid catalysts were obtained by exposing Fe(OH)3 or Fe2O3 to 0.1–0.5 N H2SO4 and then calcining in air at 500°C. Fe(OH)3 used was prepared by hydrolyzing FeCl3 or Fe(NO3)3 with ammonia, and Fe2O3 by decomposing Fe(NO3)3 at 200°C. These catalysts were active for the skeletal isomerization of butane at ro…
Developments in Extended X-Ray Absorption Fine Structure Applied to Chemical Systems, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/physchem/30/1/annurev.pc.30.100179.001243-1.gif
Abstract Cretaceous bentonites were collected in outcrop from the Sweetgrass Arch and the Disturbed Belt in Montana. The mixed-layer illite-smectite (I/S) components of the bentonites from the Sweetgrass Arch have from 0 to 25% illite layers and no detectable structurai Fe 2+ , whereas the samples from the Disturbed B…
Abstract A previously developed model of simple penetrant diffusion is extended to encompass complex penetrants of idealized molecular shape, characterized by dimensions of length, width, and thickness. Expressions are obtained for D(0,T) , the diffusion coefficient at zero penetrant concentration ( c ), and the fract…
The identification and distribution of chemical species comprising the native oxides of anodically and thermally grown films have been studied using XPS in conjunction with ion milling and chemical etching. Low angle electron diffraction was used to identity crystalline surface (∼150Å) layers of produced thermally fro…
The specific conductivities of molten N ‐methyl‐, N ‐ethyl‐, N ‐( n ‐propyl)‐, and N ‐( n ‐butyl)pyridinium chlorides and N ‐ethylpyridinium bromide were measured from near the melting points to the thermal decomposition temperatures. Conductivities also were measured from 25° to 125°C for mixtures of each of these co…
Electroluminescence phenomena were observed at the needle tip in polymer samples with a point-plane electrode system under an applied ac voltage at liquid nitrogen temperatures. This luminescence was considered to be caused by the recombination between positive and negative charges injected from the point electrode. T…
The phase transition in ${\mathrm{Pb}}_{1\ensuremath{-}x}{\mathrm{Ge}}_{x}\mathrm{Te}$ ($0<x<0.10$) and ${\mathrm{Pb}}_{1\ensuremath{-}x}{\mathrm{Sn}}_{x}\mathrm{Te}$ has been systematically investigated by the electrical-transport method. The composition dependence of the transition temperature in ${\mathrm{Pb}…
The in situ optical properties of the interface between Si and its thermally grown oxide, deduced over the spectral region between the visible and the near-ultraviolet by analysis of spectroscopic ellipsometric data, are characteristic of a (7\ifmmode\pm\else\textpm\fi{}2)-\AA{} region of atomically mixed Si and O of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of bis(pyrazine)copper(II) perchlorate, Cu(pyz)2(ClO4)2, a two-dimensional Heisenberg antiferromagnetJacques Darriet, Muin S. Haddad, Eileen N. Duesler, and David N. HendricksonCite this: Inorg. Chem. 1979, 18, 10, 2679–2682Publicati…
Static polarizabilities and hyperpolarizabilities for molecules are investigated at the correlated level. The finite-field, coupled Hartree-Fock theory is used as a zeroth-order approximation, with correlation included by using the linked-diagram expansion and many-body perturbation theory, that includes single, doubl…
Fibroblasts migrating from heart explants of chick embryos at first have a high rate of locomotion but lack focal contacts or adhesions and also lack substantial actin-containing bundles. A meshwork of 7-nm filaments is present particularly in submembranous regions and is proposed to be directed towards efficient loco…
Abstract The occurrence in fertilizer materials of small quantities of chemical elements not essential to plants suggests that the soil may become contaminated with these elements due to the use of fertilizers. Two experimental sites: a Nicollet clay loam fertilized with 0, 1,111, 2,222, 4,444, and 8,888 kg/ha of conc…
Abstract The X-ray photoelectron spectra of cobalt(III) complexes in an unusual spin triplet state are reported. The binding energies in the 2P spectral region are somewhat low and the spectra exhibit rather strong satellite structure. The Co 2P 1/2 -CO 2P 3/2 separations and satellite intensities appear to be related…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLattice dynamics and hyperfine interactions in M2FeO4 (M = potassium(1+), rubidium(1+), cesium(1+)) and M'FeO4 (M' = strontium(2+), barium(2+))Rolfe H. Herber and David JohnsonCite this: Inorg. Chem. 1979, 18, 10, 2786–2790Publication Date (Print):October 1, 1979Publication…