Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptimized synthesis, structure, and solution dynamics of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylenephosphonic acid) (H8DOTP)Istvan Lazar, Duane C. Hrncir, Won Dae Kim, Garry E. Kiefer, and A. Dean SherryCite this: Inorg. Chem. 1992, 31, 21, 4422–4424Publicati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMordenite acidity: dependence on the silicon/aluminum ratio and the framework aluminum topology. 2. Acidity investigationsHelmut Stach, Jochen Jaenchen, Hans Georg Jerschkewitz, Ursula Lohse, Barbara Parlitz, and Michael HungerCite this: J. Phys. Chem. 1992, 96, 21, 8480–848…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA stable dinitrogen complex of a ruthenium cofacial diporphyrinJames P. Collman, James E. Hutchison, Michel Angel Lopez, and Roger GuilardCite this: J. Am. Chem. Soc. 1992, 114, 21, 8066–8073Publication Date (Print):October 1, 1992Publication History Published online1 May 20…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Eero Noponen, Jari Turunen, and Antti Vasara, "Parametric optimization of multilevel diffractive optical elements by electromagnetic theory," Appl. Opt…
Abstract Non‐planar conformational distortions have recently been implicated in the biological activity of porphyrins and related tetrapyrroles in proteins, and several studies have used highly substituted porphyrins to model these nonplanar conformational distortions. Several aspects of non‐planarity in the highly su…
Abstract Unsymmetrical phthalocanines ( 5–7 ) with a single macrocyclic substituent are synthesized by the reaction of the boron complex of phthalonitrile ( 1 ) with the iminoisoindoline derivatives 2–4 of macrocyclic compounds, i.e. 15‐crown‐5, monoaza‐15‐crown‐5, and tetraazacyclotetradecane. The monomacrocycle‐subs…
A systematic study of the dielectric relaxation phenomenon has been carried out for ceramics with compositions derived from barium titanate in the frequency and temperature ranges 1 MHz–1 GHz and 250–500 K, respectively. Whatever the composition may be, a minimum of the relaxation frequency and a maximum of the dielec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and properties of molybdenum(IV,V) arenethiolates with a neighboring amide group. Significant contribution of NH.cntdot..cntdot..cntdot.S hydrogen bond to the positive shift of redox potential of Mo(V)/Mo(IV)Norikazu Ueyama, Takaaki Okamura, and Akira NakamuraCite…
This paper introduces a new solid oxide fuel cell system using a tubular cell. We have developed a computer program for a tubular solid oxide fuel cell incorporating an inner reforming process. This program enables us to estimate the distribution of the output current density, the gas density, and the temperature dist…
An electric field-temperature ( E-T ) phase diagram has been drawn for several binary mixtures of antiferroelectric liquid crystals using conoscopic observation. All the possible phases are SmA-SmC α * -SmC * -new antiferroelectric phase-new ferrielectric phase-SmC γ * -new ferrielectric phase-SmC A * , some of which…
The mole fractions of H, H2, CH3, CH4, and C2H2 that were generated in a microwave plasma under conditions typical for diamond deposition are reported. When the methane percentage in the feed gas was <1%, the measured concentrations were surprisingly similar to those reported for a hot-filament system operated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular chemistry of manganese complex [Mn(CO)3(.mu.3-OH)]4: assembly of a cubic hydrogen-bonded diamondoid network with 1,2-diaminoethaneSteven B. Copp, S. Subramanian, and Michael J. ZaworotkoCite this: J. Am. Chem. Soc. 1992, 114, 22, 8719–8720Publication Date (Pri…
Abstract Exothermic reactions of some self igniting fuel‐HNO 3 systems have been examined by the rapid‐scan FIR/thermal profiling technique. A sudden rise in temperature is observed when the liquid oxidizer is dropped onto the solid fuel. Simultaneous monitoring of the gas products of the reaction occurring between p‐…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spin resonance and electron spin echo modulation studies of copper(II) ions in the aluminosilicate chabazite: a comparison of copper(II) cation location and adsorbate interaction with isostructural silicoaluminophosphate-34Maggie Zamadics and Larry KevanCite this: J…
Abstract The modeling of the viscoelastic properties of semicrystalline polymeric matrix composites is discussed. Different mathematical models are applied to describe the development of the storage modulus, measured by dynamic mechanical analysis, as a function of the crystalline content during isothermal crystalliza…
The crystallographic and magnetic properties of the series of R2Fe17CNx, where R=Y, Sm, Gd, Tb, Dy, and Er have been investigated in comparison with those of R2Fe17C and R2Fe17N3−δ. The results indicate that Sm2Fe17CNx, which possesses a higher Curie temperature, a larger saturation magnetization, and a stronger aniso…
The resistance of commercial austenitic, ferritic, and duplex alloys to stress corrosion cracking in a 5% NaOH–2% Na2S–2% Na2CO3–0.2% Na2SO4–0.1% NaCl solution at 150°C has been studied by immersion tests and electrochemical measurements. The effects of alloy composition, solution composition, and test temperature on…
The electrical conductivity of high‐purity, single‐crystal alumina is determined parallel to and perpendicular to the c ‐axis. The mean conductivity of four samples of each orientation is a factor 3.3 higher parallel to the c ‐axis than perpendicular to it. The conductivity as a function of temperature is attributed t…
The 3s and 3p photoelectrons have been measured in pure and Cr-doped ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$, in the antiferromagnetic insulator, paramagnetic metal, and paramagnetic insulator phases. It is found that 3s photoemission provides us with information about local magnetic moments created by 3d electrons in th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing-opening isomerization polymerization of cyclic iminocarbonatesMasatoshi Miyamoto, Keigo Aoi, Masao Morimoto, Yoshiki Chujo, and Takeo SaegusaCite this: Macromolecules 1992, 25, 22, 5878–5885Publication Date (Print):October 1, 1992Publication History Published online1 Ma…