Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProton and carbon-13 NMR investigations of lead zirconate titanate (Pb(Zr,Ti)O3) thin-film precursor solutionsR. A. Assink and R. W. SchwartzCite this: Chem. Mater. 1993, 5, 4, 511–517Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Publish…
In a number of isostructural sesquioxides M 2 O 3 (M=Sc, In, Y, Yb, Dy, Ho, Sm, Gd) with the bixbyite structure the electric field gradients at substitutional 111 Cd nuclei show a regular and smooth dependence on the lattice constant. The electric field gradients allow the positions of all atoms in the unit cell to be…
Single-crystal structure determinations of the spin crossover compounds [Fe(ptz) 6 ]X 2 , and [Fe(mtz) 6 ]X 2 (ptz=C 3 H 7 N 4 CH, mtz=CH 3 N 4 CH, X=BF 4 , ClO 4 ) have been performed at different temperatures. The temperature dependence of the lattice constants was measured for the two mtz compounds between 300 and…
We examined partial or complete replacement of synthetic sorbents by cotton- containing nonwovens for use in oil spill cleanup. The results indicate that with light crude oil, oil sorption capacities of the needlepunched cotton-containing sorbents were slightly greater than those of sorbents made from 100% polypropyle…
A detailed atomistic approach has been used to investigate the kinematics of plastic deformation in glassy atactic polypropylene to 20% strain. The microstructural stress-strain behaviour was found to consist of smooth reversible portions bounded by irreversible sharp stress drops indicating plastic rearrangement of t…
Structure and Dynamics of Lanthanoid Tetraazacyclododecanetetraacetate DOTA Complexes in Solution In aqueous solution lanthanoid DOTA complexes exist as a mixture of two stereoisomers, and their structures have been determined from the dipolar parts of the observed 1 H‐NMR chemical shifts for EuDOTA and YbDOTA. The re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and ceramic conversion reactions of borazine-modified hydridopolysilazanes: new polymeric precursors to silicon nitride carbide boride (SiNCB) ceramic compositesKai Su, Edward E. Remsen, Gregg A. Zank, and Larry G. SneddonCite this: Chem. Mater.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLateral instabilities in a grafted layer in a poor solventChuck Yeung, Anna C. Balazs, and David JasnowCite this: Macromolecules 1993, 26, 8, 1914–1921Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of the isotropic-nematic-nematic phase separation for a solution of bidisperse rodlike particlesG. J. Vroege and H. N. W. LekkerkerkerCite this: J. Phys. Chem. 1993, 97, 14, 3601–3605Publication Date (Print):April 1, 1993Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBimetallic lanthanide complexes with lanthanide-transition metal bonds. Molecular structure of (C4H8O)(C5H5)2LuRu(CO)2(C5H5). The use of 139La NMR spectroscopyI. P. Beletskaya, A. Z. Voskoboynikov, E. B. Chuklanova, N. I. Kirillova, A. K. Shestakova, I. N. Parshina, A. I. Gu…
Abstract Nanometer sized cadmium sulfide particles were prepared in N,N‐dimethylformamide, using thiourea as the sulfurizing agent and thioglycerine as stabilizer. For particles with diameters of less than 40 Å the size dependent solubility was utilized to separate the particles according to their size. The absorption…
A rigorous modal analysis of lamellar gratings, i.e. gratings having rectangular grooves, in conical mountings is presented. It is an extension of the analysis of Botten et al. which considered non-conical mountings. A key step in the extension is a decomposition of the electromagnetic field in the grating region into…
and , which are known to be excellent proton conductors, are potential candidates as electrolytes in hydrogen concentrators and fuel cells. The anticipated application temperature is in the range of ∼500 to ∼1000°C. Typical synthesis/densification temperature of these cerates using conventional processing methods is ∼…
Twenty-five gram-negative bacteria and one gram-positive bacterium capable of growing on poly(3-hydroxyoctanoic acid) [P(3HO)] as the sole source of carbon and energy were isolated from various soils, lake water, and activated sludge. Most of the isolates degraded only P(3HO) and copolymers of medium-chain-length (MCL…
A dynamic model that computes the flashover voltages of polluted insulators energized with DC voltage is presented. The salient feature of this model is that it takes into account the configuration of the insulator profile at every instant, which plays an important role in the flashover process of the DC polluted insu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and magnetic properties of two nitronyl nitroxide biradicals and of their copper(II) complexesA. Caneschi, P. Chiesi, L. David, F. Ferraro, D. Gatteschi, and R. SessoliCite this: Inorg. Chem. 1993, 32, 8, 1445–1453Publication Date (Print):April 1, 1993Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleCascade polymers. 35. pH dependence of hydrodynamic radii of acid-terminated dendrimersGeorge R. Newkome, James K. Young, Gregory R. Baker, Robert L. Potter, Laurent Audoly, David Cooper, Claus D. Weis, Kevin Morris, and Charles S. Johnson Jr.Cite this: Macromolecules 1993, 26,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-yield epoxidations with hydrogen peroxide and tert-butyl hydroperoxide catalyzed by iron(III) porphyrins: heterolytic cleavage of hydroperoxidesTeddy G. Traylor, Shinji Tsuchiya, Young Seok Byun, and Cheal KimCite this: J. Am. Chem. Soc. 1993, 115, 7, 2775–2781Publicati…
Minimum amounts of SiO 2 and CaO required for inducing abnormal grain growth in alumina were determined using ultrapure alumina (>99.999%) and sintering at 1900°C for 1 h in a contamination‐free condition. The critical concentrations of silicon in cationic mole fractions in alumina were 300 ppm without calcium, 200…
There has been much recent effort in the design of optimal chromophores for second-order nonlinear optical (NLO) applications. Most studies of organic molecules have focused on donor-acceptor π-conjugated molecules containing aromatic groups. We will show that the NLO response of aromatic donor-acceptor chromophores i…