Materials Literature
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The largest discrete iodocuprate(I) ion observed so far has been identified in the compound (pyH) 2 [Cu 3 I 5 ]. 36 CuI tetrahedra are linked through common edges to form a highly symmetrical polyanion [Cu 36 I 56 ] 20⊖ with the extremely rare symmetry 432 (O).
We obtained forces on 3.0 and 6.0 CRH, ogival-nosed projectiles penetrating a simulated geological target. A gas gun and a powder gun accelerated foundry core targets (a simulated soft sandstone) to steady velocities between 0.6–2.1 km/s, and the targets subsequently impacted 20.6 mm diameter penetrators. Rigid-body m…
Abstract Earlier studies by differential scanning calorimetry showed anomalous behavior of T g with varying amounts of dioctyl phthalate, while by dynamic mechanical analysis 2 T g 's were found over a limited concentration range. In this study, two adjacent T g 's were found over the complete range of concentrations…
Abstract The dehydration temperature of K-montmorillonite, obtained by ion exchange of a Na-mont-morillonite, was determined at pressures to 2 kbar, using high-pressure differential thermal analysis. Dehydration reactions were found at about 50° and 100°C above the liquid-vapor curve of water. At pressures above the c…
In order to investigate the microscopical aspects of the SMSI state in catalysts we performed photoemission experiments on samples consisting of submonolayer Pt deposits on a Ti(0001) surface and on a TiO2 thin film. Annealing Pt/TiO2 samples at ∼500 °C caused a change in the electronic structure of Pt atoms which was…
Samples in the (Ni x Cu 1‐x )O system, 0.5 ≤ x ≤ 1.0, have been examined using powder X‐ray diffraction and high‐temperature Solution calorimetry. According to the X‐ray characterization samples form a one‐phase rock salt solid solution up to x = 0.30, and crystallize with a tetragonal structure at x = 0.35. The entha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacroporous gels. 1. Polymerization of trimethylolpropane trimethacrylate in tolueneJ. E. Rosenberg and P. FlodinCite this: Macromolecules 1986, 19, 6, 1543–1546Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 June 1986ht…
ABSTRACT The mechanism of the formation of a rigid foam structure during whipping of reconstituted whipping cream was investigated. The rheological properties of whipped cream were estimated from an analysis of shear creep curves by a four element model. The values of each element increased exponentially during the pr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElucidation of the mechanism and kinetics of the silicon, aluminum ordering process in synthetic magnesium cordierite by silicon-29 magic angle spinning NMR spectroscopyColin A. Fyfe, Gian C. Gobbi, and Andrew. PutnisCite this: J. Am. Chem. Soc. 1986, 108, 12, 3218–3223Publi…
Abstract Resonance Raman, ESR and visible absorption spectra have been observed at room temperature for the 4, 4′‐bipyridine radical anion in tetrahydrofuran and for 4, 4′‐bipyridine adsorbed on metallic potassium. Based on the quinoid structure of the radical anion, as predicted by the MO theory, a normal coordinate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the reduction of ketones by trialkylsilane. Hydride transfer, SET-hydrogen atom abstraction, or free radical additionD. Yang and D. D. TannerCite this: J. Org. Chem. 1986, 51, 12, 2267–2270Publication Date (Print):June 1, 1986Publication History Published online…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexanuclear tungsten cluster structures: tetradecachlorohexatungstate(2-), tetradecabromohexatungstate(2-), and tetradecaiodohexatungstate(2-) relevance to unusual emissive behaviorThomas C. Zietlow, William P. Schaefer, Behzad Sadeghi, Nhi Hua, and Harry B. GrayCite this: I…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPalladium-lanthanum catalysts for automotive emission controlHideaki Muraki, Hirofumi Shinjoh, Hideo Sobukawa, Kohji Yokota, and Yoshiyasu FujitaniCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 2, 202–208Publication Date (Print):June 1, 1986Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactivity of rhodium and iridium octaethylporphyrin hydrides toward carbon monoxide: thermodynamic studies of the rhodium formyl and iridium hydrido carbonyl complexesMaria D. Farnos, Bruce A. Woods, and Bradford B. WaylandCite this: J. Am. Chem. Soc. 1986, 108, 13, 3659–36…
Dislocation mobilities in quasicrystals are calculated from recently developed hydrodynamic equations. The mobilities are expressed in terms of vacancy diffusion constants for the quasicrystal. Estimates of these diffusion constants based on their values in conventional crystals lead to far smaller dislocation mobilit…
Elevated NA fluoride optical fibers having minimum losses of less than 1 dB/km have been prepared using a dry processing technique. NA ranging from 0.19 to 0.24 has been obtained by substituting LiF and/or ZrF 4 in basic core and cladding glasses consisting of ZrF 4 –BaF 2 –LaF 3 –YF 3 –AlF 3 –LiF by NaF and/or HfF 4…
SUMMARY Samples of two soils were incubated at 60°C for 24 h with several levels of either calcium carbonate or hydrochloric acid. Zinc retention was then measured on subsamples of the treated soil over 24 h at 25°C. The results were compared with published experiments (Bar‐Yosef, 1979; Harter, 1983) in which zinc ret…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure and redox mechanism of dodecamolybdophosphateHiroshi Taketa, Sinichi Katsuki, Koichi Eguchi, Tetsuro Seiyama, and Noboru YamazoeCite this: J. Phys. Chem. 1986, 90, 13, 2959–2962Publication Date (Print):June 1, 1986Publication History Published online1 Ma…
Etude par diffraction de neutrons sur 7 composes Ba x (M 3+ Ti 4+ ) 8 O 16 . Influence des ions trivalents tels que Al, Fe, Ga sur les variations de l'environnement des sites tunnel et la nature de la transformation monoclinique-quadratique dans les hollandites
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous catalytic photochemical functionalization of alkanes by polyoxometalatesRoman F. Renneke and Craig L. HillCite this: J. Am. Chem. Soc. 1986, 108, 12, 3528–3529Publication Date (Print):June 1, 1986Publication History Published online1 May 2002Published inissue 1 J…