Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOlefin polymerization by vanadium-containing silsesquioxanes: synthesis of a dialkyl-oxo-vanadium(V) complex that initiates ethylene polymerizationFrank J. Feher and Rusty L. BlanskiCite this: J. Am. Chem. Soc. 1992, 114, 14, 5886–5887Publication Date (Print):July 1, 1992Pub…
R ‐curves for two in‐situ reinforced silicon nitrides A and B of nominally the same composition are characterized using the Griffith equation and indentation fracture mechanics. These R ‐curves are calibrated against fine‐grained silicon nitrides which have a known chevron‐notch (long‐crack) toughness and with a nearl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTESR of the cationic triradical of 1,3,5-tris(diphenylamino)benzeneKazunari Yoshizawa, Akihisa Chano, Akihiro Ito, Kazuyoshi Tanaka, Tokio Yamabe, Hideo Fujita, Jun Yamauchi, and Motoo ShiroCite this: J. Am. Chem. Soc. 1992, 114, 15, 5994–5998Publication Date (Print):July 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of a homonuclear ferromagnetic chain: structures and magnetic properties of oxalato-bridged copper(II) complexes with one-dimensional structuresHiroki Oshio and Umpei NagashimaCite this: Inorg. Chem. 1992, 31, 15, 3295–3301Publication Date (Print):July 1, 1992Publicat…
A cDNA for branched-chain alpha-ketoacid dehydrogenase kinase was cloned from a rat heart cDNA library. The cDNA had an open reading frame encoding a protein of 382 amino acid residues with a calculated molecular weight of 43,280. The clone codes for the branched-chain alpha-ketoacid dehydrogenase kinase based on the…
Cooperative magnetic interactions in molecular materials at room temperature are the goal of much interdisciplinary research. The title compound is shown to have a T c of 18 K and to be of a new structural type which makes it a suitable model for the previously reported, disordered, infusible V(TCNE), which is a room‐…
Experiments are reported on two techniques for melt-texture processing Ba2YCu3O6.5 by directional solidification from a semisolid melt containing particles of BaY2CuO5 and a copper-rich liquid. One of these employs an electric resistance furnace with ambient or oxygen enriched atmosphere; the other is a laser-heated f…
Abstract A quenched ethylene‐hexene copolymer was annealed in the temperature range of 86 to 127°C. The morphological changes were monitored by differential scanning calorimetry (DSC) and density. The slow crack growth resistance tested at 80°C was a maximum at an annealing temperature of 113°C and a minimum of 123°C.…
Abstract The surface and mechanical properties of thin Cr films play an essential role in microphotolithographic processes in which an inorganic photoresist based on vacuum‐evaporated As 2 S 3 is used as a light‐sensitive system. The present paper reports some XPS data about thin chromium layers obtained by thermal ev…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-valent iron porphyrins. NMR evidence for .pi.-anion-radical character in two-electron-reduced iron(III) meso- or .beta.-pyrrole-substituted porphyrinsKazuya Yamaguchi and Isao MorishimaCite this: Inorg. Chem. 1992, 31, 15, 3216–3222Publication Date (Print):July 1, 1992Pu…
Abstract Two common problems and probable solutions in the TG-DTG analysis of unknown elastomer vulcanizates have been discussed. The first problem concerns the difficulty in quantitatively determining the oil and elastomer in compounds where their volatilization temperature ranges overlap. After a review of the publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExactly alternating silarylene-siloxane polymers. 9. Relationships between polymer structure and glass transition temperaturePetar R. Dvornic and Robert W. LenzCite this: Macromolecules 1992, 25, 14, 3769–3778Publication Date (Print):July 1, 1992Publication History Published…
1 MeV electron irradiation has been performed in degenerate, n-type (n≂2×1017 cm−3), molecular beam epitaxial GaAs layers, and Hall effect measurements have been carried out during the irradiation in order to get accurate defect production data. The results have been fitted with statistical models, and are most consis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphological study of phase transition behavior in syndiotactic polystyreneYing Kang Wang, John D. Savage, Decai Yang, and Shaw L. HsuCite this: Macromolecules 1992, 25, 14, 3659–3666Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Publishe…
Abstract Reactive melt processing of different types of diamines with polyethylene containing carboxylic acid groups and polystyrene containing anhydride groups was carried out. The reactivity of primary, secondary, and tertiary diamines with these acid polymers was determined using various techniques. Molecular weigh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction and reactions of triplet CS: matrix infrared and ultraviolet spectra of C2S2Robert B. Bohn, Yacine Hannachi, and Lester AndrewsCite this: J. Am. Chem. Soc. 1992, 114, 16, 6452–6459Publication Date (Print):July 1, 1992Publication History Published online1 May 2002P…
The present study reports the use of monochromatic, high resolution x-ray photoelectron spectroscopy to investigate the evolution of the s and p bands of select metals, and the resulting O(2p) bands of their oxides as the process of oxidation (or reduction) sequentially occurs. Those metals in the groups I B, II B, II…
The intrinsic susceptibility of stainless steels to corrosive attack by barnacles is a widely recognized phenomenon. Corrosion usually manifests itself in crevices, corresponding to the base of the barnacles’ shell. The purpose of this investigation was to elucidate a mechanism for this corrosion phenomenon. Based on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of magnesium sesquicarbideHelmer Fjellvaag and Pavel KarenCite this: Inorg. Chem. 1992, 31, 15, 3260–3263Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July 1992https://pubs.acs.org/doi/10.1021/ic00041…
Abstract The status of advanced nonlinear optical materials is reviewed with regard to the requirements implied by their respective applications. Although many functions utilizing nonlinear optical (NLO) materials have been demonstrated in research laboratories, only a few components have found a place in real systems…