Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIron(III)-porphyrin .pi.-cation radical complexes. Molecular structures and magnetic propertiesGeorges Buisson, Alain Deronzier, Emile Duee, Pierre Gans, Jean Claude Marchon, and Jean Rene RegnardCite this: J. Am. Chem. Soc. 1982, 104, 24, 6793–6796Publication Date (Print):D…
Abstract Azoles such as benzotriazole and benzimidazole are used as corrosion inhibitors, particularly for copper. The purpose of this work is to further illuminate the bonding and film growth for benzimidazole‐like structures. The interaction of imidazole, benzimidazole, 2‐methylbenz‐imidazole and benzotriazole with…
The optical transparency and refractive index were measured over a wide wavelength range from the UV into the infrared for five glasses of potential use for long-wavelength optical fibers. The glasses contain 30-50 mole % Ge0(2) with the addition of Bi(2)O(3), Tl(2)O, PbO, and Sb(2)O(3). Indices were measured with a c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemical reactivity in organized assemblies. 30. Self-sensitized photooxidation of protoporphyrin IX derivatives in aqueous surfactant solutions; product and mechanistic studiesG. Sidney Cox, Marianne Krieg, and David G. WhittenCite this: J. Am. Chem. Soc. 1982, 104, 25…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStable gold hydride complexesH. Lehner, D. Matt, P. S. Pregosin, L. M. Venanzi, and A. AlbinatiCite this: J. Am. Chem. Soc. 1982, 104, 24, 6825–6827Publication Date (Print):December 1, 1982Publication History Published online1 May 2002Published inissue 1 December 1982https:/…
Order in computer-generated binary arrays of hard disks grown from a seed cluster is studied. As the composition and ratio of disk diameters are varied, we find both crystalline and amorphous samples, as well as "hexatic" configurations with short-range translational order but extended orientational correlations. A si…
Suboxide thin films of SbOx, TeOx, MoOx, and GeOx (x is smaller than the stoichiometric value for each component) were found to have the property of showing a critical change in their absorption coefficients and refractive indices at elevated temperatures. The thin-film samples were prepared by evaporating a mixture o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of dimercury through coordination to platinum cluster unitsAlberto Albinati, Alfred Moor, Paul S. Pregosin, and Luigi M. VenanziCite this: J. Am. Chem. Soc. 1982, 104, 26, 7672–7673Publication Date (Print):December 1, 1982Publication History Published online1 M…
Summary Concentrations of dialysable silica in equilibrium with Al 2 O 3 ‐SiO 2 ‐H 2 O sols at pH 4.5–5.0 confirm the formation of a poorly ordered non‐dialysable proto‐imogolite species with an Al : Si ratio near 2, close to that of imogolite. Sols with Al : Si>2 give nearly constant levels of free silica in solut…
Summary Strontium sulfate scale in the Fateh field results from mixing incompatible waters. Precipitation squeezes with phosphonate scale inhibitors were shown to be effective in laboratory studies and field use of precipitation squeezes confirmed this. Continued use has resulted in additional operating and performanc…
Magnetisation in the Pd2MnSn Heusler alloy was observed to be drastically reduced by plastic deformation. The reduction is able to be explained in terms of the dislocation theory with the consideration of ferromagnetic and antiferromagnetic Mn-Mn interactions. Plastic deformation makes Mn atoms on the regular site sub…
The Ross (R) plastic caliper scale (y) systematically overestimates the true thickness (x): y = 1.148 X +0.112, r = 0.999. The Harpenden (H) ealiper scale was accurate.The jaw pressure of the Ross caliper (X± SD = 12.0 ± 0.9 g/mm2) overestimated the Harpenden pressure (7.95 ±0.2 g/mm2), compensating somewhat the scale…
Résumé- Les relations entre ségrégation intergranulaire et fragilisation par I'hydrogène des métaux peuvent s'envisager d'un double point de vue: 1°) L'hydrogène a une forte tendance à ségrêger dans les défauts de struc-ture et en particulier les joints de grains. Cette ségrégation…
Résumé.- Les joints de grains des isolants, des semiconducteurs et des métaux pré-sentent des propriétés électriques très différentes que nous exposons de manière succinte dans le cas des isolants et des semiconducteurs et de manière plus détail-lée dans celui des métaux. Abstract.- The electrical properties of grain…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparative kinetics of axial ligation to ruthenium and iron porphyrin and phthalocyanine complexes. The relationship between spin state and cis- and trans- effectsFrank Pomposo, David Carruthers, and Dennis V. StynesCite this: Inorg. Chem. 1982, 21, 12, 4245–4248Publication…
Development of a special application of hafnium for pressurized water reactor control rods is discussed. A unique feature of the design is the sealing of the hafnium material inside protective stainless steel tubing, whereas in prior applications the hafnium material was exposed directly to the reactor primary coolant…
Abstract. Ecology and morphology of Alcyonium (Parerythropodium) coralloides were studied in different sites of the Eastern Atlantic and the Mediterranean. The species is extremely variable in size, colony shape and colour. In the Mediterranean population, encrusting red colonies are mostly encountered, although lobat…
The electronic states of the V 4+ ions in β-Na 0.33 V 2 O 5 are studied by NMR and EPR measurements. The anomalous temperature dependence of the Knight shift of the 51 V nuclei in site I can be understood by the spin singlet ground state of the electron pairs of the adjacent V 4+ ions (bipolarons). Recent X-ray diffra…
Order-of-magnitude improvement of the quantum efficiency of metal-oxide-metal detectors is achieved in the visible spectrum by fabricating the devices on silica substrates structured with a periodic array of bumps separated by about 0.25 microm. Structuring metallic films affords improved coupling of the detector to v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of .beta.-maltose octaacetate. A model in retrospect for amylose triacetate?F. Brisse, R. H. Marchessault, S. Perez, and P. ZugenmaierCite this: J. Am. Chem. Soc. 1982, 104, 26, 7470–7476Publication Date (Print):December 1, 1982Publication His…