Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure determinations of halotetrakis(tert-butyl isocyanide)((N,N'-di-tert-butyldiamino)acetylene)molybdenum(II) complexesPeter W. R. Corfield, Laima M. Baltusis, and Stephen J. LippardCite this: Inorg. Chem. 1981, 20, 3, 922–929Publication Date (Print):March 1, 1981Publi…
The response of a spherical bubble in an inviscid compressible liquid is studied for five different bubble models. It is shown that the qualitative behavior of the models is essentially the same, even under intense cavitation conditions. The quantitative behavior is similar, especially for low Mach numbers.
Abstract AgCo 3 H 2 (AsO 4 ) 3 ( 1 ) und AgZn 3 H 2 (AsO 4 ) 3 ( 2 ) wurden durch Erhitzen eines Gemisches von As 2 O 5 , AgNO 3 , CoSO 4 · 7H 2 O bzw. ZnSO 4 · 7H 2 O und Wasser auf 300°C im Autoklaven dargestellt und röntgenographisch untersucht. Beide Verbindungen sind isotyp und kristallisieren in der monoklinen R…
The title compound NEP-TCNQ crystallizes with θ-bonded (TCNQ−-TCNQ−)-dimers. We show by model calculations and ESR spectroscopy, that these bonds can be broken by thermal activation. The reverse reaction occurs spontaneously. The excited states are characterized as quasi immobilized triplet spin excitons (TSE) localiz…
Abstract The X-ray photoelectron spectrum of the powder of Cr2O5 was measured and compared with those of the related chromium compounds. It is concluded that Cr2O5 is a mixed-valence compound having Cr3+ and Cr6+ ions, possibly with the ratio of 1 : 2.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen-17 magnetic resonance and temperature-jump spectrophotometric study of the square planar-octahedral equilibrium in the 1,4,7,10-tetraazacyclododecanenickel(II) systemJohn H. Coates, Dewan A. Hadi, Stephen F. Lincoln, Harold W. Dodgen, and John P. HuntCite this: Inorg.…
In this paper the pseudo-spin-lattice-coupled-mode (PLCM) model has been extended to study the static and the dynamic properties of PbHP${\mathrm{O}}_{4}$ and its deuterated form PbDP${\mathrm{O}}_{4}$. Using a double-time temperature-dependent Green's-function technique, we have derived the expressions for the transi…
Optical, X-ray, and electron metallography have been used to examine the substructures and textures developed in 90–10 brass after rolling reductions from 18 to 96%. The substructures formed in this alloy, which has an intermediate value of stacking fault energy, have been found to be orientation dependent. In some re…
We present a theory for the late-stage spinodal decomposition for two relaxational tricritical models in which the order parameter is nonconserved and the subsidiary order parameter is either conserved or nonconserved. We find that for $d$-dimensional systems (for $d>1$) the characteristic domain size grows in prop…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadical anions of triptycene bis- and tris(quinones)Glen A. Russell, N. K. Suleman, Hiizu Iwamura, and Owen W. WebsterCite this: J. Am. Chem. Soc. 1981, 103, 6, 1560–1561Publication Date (Print):March 1, 1981Publication History Published online1 May 2002Published inissue 1 M…
The structural characteristics of four random network models of B2O3 glass are discussed, and their computed X-ray radial distribution functions are compared with experiment. A random network based on the boroxol ring hypothesis gives marginally the best agreement with the observed distribution function at low interat…
Partial ionic and electronic dc conductivities and compressional creep rate were measured for hot‐pressed poly crystalline AI 2 O 3 made from AI‐isopropoxide (AI 2 O 3 (II)). The undoped material was found to contain 1.5×10 18 cm −3 fixed valency acceptors (Mg). Properties of undoped material and material doped with F…
Abstract Uni‐ and biaxial stretching of poly(ethylene terephthalate) (PET) specimens of appropriate geometry at temperatures near the glass‐rubber transition may lead to non‐uniform deformation unless the draw ratio exceeds a critical value, the natural draw ratio, characteristic of the onset of strain hardening due t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoatropisomerization of "picket-fence" porphyrins and their metal complexesRuth A. Freitag, Janet A. Mercer-Smith, and David G. WhittenCite this: J. Am. Chem. Soc. 1981, 103, 5, 1226–1228Publication Date (Print):March 1, 1981Publication History Published online1 May 2002P…
Abstract The synergism in limiting oxygen index found in BPA carbonate–dimethylsiloxane block polymers (BPAC/DMS) is correlated with a rise in yield of pyrolytic char and an improvement in char oxidation resistance. These changes in turn are related to a peaking of fractional silicon retention in the char at a resin c…
Abstract— The formation of the cation radical of methyl viologen was established when an aqueous solution containing zinc‐meso‐tetraphenylporphyrintrisulfonic acid, methyl viologen and mercaptoethanol was irradiated by visible light. The reduction of methyl viologen has been studied kinetically and the reduction rate…
Abstract Organic compounds containing oxygen and nitrogen like alcohols and pyridine were readily incorporated into the bulk of heteropoly acids, while hydrocarbons such as butenes and benzene were adsorbed only on the surface. It was found in the dehydration of ethanol over H3PW12O40 that ethylene was yielded predomi…
Abstract The limiting oxygen index (LOI) has been determined for each of a large number of silicone‐containing resins, principally dimethylsiloxane (DMS) block polymers varying widely in DMS content and hard block type. A synergistic enhancement in LOI of varying strength is seen in several families of resins. For the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStepwise reduction of carbon monoxide to methane on a triosmium cluster face. Preparation and characterization of undecacarbonyl(methylene)triosmiumGuy R. Steinmetz and Gregory L. GeoffroyCite this: J. Am. Chem. Soc. 1981, 103, 5, 1278–1279Publication Date (Print):March 1, 1…
Two year sea water immersion tests were carried out at four North American sites on a wide range of austenitic stainless steels. Some of these steels were found to be completely free from crevice corrosion at all exposure sites. Immersion of the alloys in FeCl3 in the laboratory provided a more severe test of their cr…