Materials Literature
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The glass transition studied for suspensions of colloidal particles through dynamical light-scattering experiments is analyzed within the mode-coupling theory for the supercooled liquid dynamics. These suspensions are treated as simple atomic systems with a hard-sphere interaction. The scaling properties predicted by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of electron transfer rates on donor-acceptor angle in bis-porphyrin adductsAnna Helms, David Heiler, and George McLendonCite this: J. Am. Chem. Soc. 1991, 113, 11, 4325–4327Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published…
Scanning tunneling microscopy (STM) observation was performed for the surface of diamond epitaxial film which was grown on a diamond (001) substrate by microwave plasma-assisted chemical vapor deposition (CVD). The surface was stable even in air, and it showed a reflection high-energy electron diffraction (RHEED) patt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransfer energetics of tetraalkylammonium picrates in an aqueous ionic cosolvent system and the salt effect on hydrophobic hydrationHimansu Talukdar and Kiron Kumar KunduCite this: J. Phys. Chem. 1991, 95, 9, 3796–3800Publication Date (Print):May 1, 1991Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural characterization of decaselenidoheptamercurate(4-) and [Hg7Se9]n4n-: novel metal-chalcogenide frameworksKang Woo Kim and Mercouri G. KanatzidisCite this: Inorg. Chem. 1991, 30, 9, 1966–1969Publication Date (Print):May 1, 1991Publication History Publi…
This review includes new developments in aromatic sulfide and sulfone thermoplastics, electroconductive and electrooptical polymers, polymeric sulfur cements and coatings, sulfonated polymers, and rubber vulcanizing agents. New agrochemicals include sulfonylurea herbicides, and tetrathiocarbonate soil fumigants. A new…
Upon hydrogenation of magnesium in THF using homogeneous magnesium‐anthracene transition‐metal halide catalysts in the presence of small amounts of MgCl 2 and solubilizing agents L, a dissolved form of magnesium hydride (MgH' 2 ) is produced. The preferred L's are quinuclidine (QC) or organomagnesium compounds; howeve…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Eudesmanolides from Sphaeranthus indicusMohammed Saleh Shekhani, Pir Muazzam Shah, Khalid Mohammed Khan, and Atta-ur-RahmanCite this: J. Nat. Prod. 1991, 54, 3, 882–885Publication Date (Print):May 1, 1991Publication History Published online1 July 2004Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry of (octaethylporphinato)cobalt(II), (OEP)Co, under a carbon monoxide atmosphere. Electrogeneration and characterization of [(OEP)CoIII(CO)]+Y. Hu, B. C. Han, L. Y. Bao, X. H. Mu, and K. M. KadishCite this: Inorg. Chem. 1991, 30, 10, 2444–2446Publication Date…
Abstract Instrumented impact testing of linear low density polyethylene (LLDPE I) (ethylene and 1‐octene copolymer) was carried out using a Rheometrics Drop‐Weight Tester (RDT‐5000). A method of partial penetration at controlled impact energy was used and developed. The set impact speed was raised step by step in smal…
Abstract The measurement of parison swell is difficult because swell is a time‐dependent phenomenon and because, for a parison, two independent swell ratios must be determined. A new technique has been developed that makes use of a video camera focused on the end of the parison. Unlike previous techniques designed to…
Abstract MoO 3 thin films after irradiated with a UV light showed enhancement in electrochromism when compared to the non‐irradiated ones. It was found that the change in absorbance for the irradiated portion was as large as six times that of the non‐irradiated portion of a sample. This enhancement in electrochromism…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of microstructure in poly[(p-hydroxybenzoic acid)-co-(ethylene terephthalate)] using nuclear magnetic resonance spectroscopyKarl R. Amundson, Jeffrey A. Reimer, and Morton M. DennCite this: Macromolecules 1991, 24, 11, 3250–3260Publication Date (Print):May 1, 1…
The cold-rolled and recrystallization textures of Fe-Cr-Co-Mo permanent magnet alloys are described. The studied composition is Fe-30%Cr-15%Co-3%Mo (in wt.%). The cold-rolled texture can be considered to be [111], [111], [100], and [211], while the recrystallization texture can be considered to be [111], [110], [211],…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix infrared study of the neodymium-doped yttrium aluminum garnet laser depolymerization products of solid phosphorus oxide (P4O10)Matthew McCluskey and Lester AndrewsCite this: J. Phys. Chem. 1991, 95, 9, 3545–3549Publication Date (Print):May 1, 1991Publication History P…
The standard split‐Hopkinson bar data reduction procedure assumes uniform conditions exist over the length of the specimen allowing the average stress‐strain response to be computed. When the stress wave enters the specimen, a gradient is established along its longitudinial axis. To use the standard analysis, approxim…
Abstract Gel fraction and equilibrium elastic modulus of networks formed from α, ω‐dihydroxypoly(oxypropylene) and bis(4‐isocyanatophenyl)methane (MDI) as a result of side reactions were compared with theoretical predictions based on the theory of branching processes (Macromolecules, 23, 1774 (1990)). If isocyanate is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton-assisted photoinduced electron transfer from porphyrin to quinone: a photo-CIDNP and laser flash photolysis studyDevens Gust, Thomas A. Moore, Ana L. Moore, Xiaochun C. Ma, Ronald A. Nieman, Gilbert R. Seely, Robert E. Belford, and Jeffery E. LewisCite this: J. Phys.…
In view of the observation that a CHCl3-soluble fraction of the MeOH extract of Chrysosplenium grayanum has shown cytotoxic activity in the KB cell in vitro system, the fraction has been further fractionated to furnish five known flavonoids (chrysosplenols B, D, and E, retusin, and brickellin), 3,5-dihydroxy-4-methoxy…
Anionic copolymerization of elemental sulfur (S8) with cyclic monosulfides (thiiranes) is shortly reviewed. More recent work on homopolymerization of cyclic trisulfides (1,2,3-trithiolanes) and their copolymerization with S8 is discussed in more detail. Anionic homopolymerization of cyclic trisulfides is a living, hig…