Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolychalcogenide synthesis in molten salts. Novel one-dimensional compounds in the potassium-copper-sulfur system containing exclusively S42- ligandsMercouri G. Kanatzidis and Younbong ParkCite this: J. Am. Chem. Soc. 1989, 111, 10, 3767–3769Publication Date (Print):May 1, 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical aging studies in polymer blends. 2. Enthalpy relaxation as a function of aging temperature in a poly(vinyl methyl ether)/polystyrene blendJohn M. G. Cowie and Roderick FergusonCite this: Macromolecules 1989, 22, 5, 2312–2317Publication Date (Print):May 1, 1989Public…
We present a new method for calculating electrostatic interactions in periodic systems with charged or dipolar particles. The method is appreciably faster than the Ewald summation method used until now in computer simulations of ionic and dipolar systems. The method may also be used for calculating the periodic crysta…
The interaction of oxygen with Pd(110) has been studied by thermal desorption spectroscopy (TDS), work function change (Δφ), and Auger electron spectroscopy (AES) at 100<T<900 K. Thermal desorption spectra reveal three major peaks, a low temperature one (α) being from molecular adsorbates and the other t…
Abstract Electro-optical properties based on light scattering controlled by a.c. electric field were investigated for polymer/(liquid crystal) composite films. Scanning electron microscopic observation for the matrix polymer after extraction of LC with methanol exhibited that LC molecules were continuously embedded in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of order on the photophysical properties of the liquid crystal zinc octakis(.beta.-octoxyethyl)porphyrinBrian A. Gregg, Marye Anne Fox, and Allen J. BardCite this: J. Phys. Chem. 1989, 93, 10, 4227–4234Publication Date (Print):May 1, 1989Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNMR study of acid-base equilibria and other reactions of ammineplatinum complexes with aqua and hydroxo ligandsTrevor G. Appleton, John R. Hall, Stephen F. Ralph, and Craig S. M. ThompsonCite this: Inorg. Chem. 1989, 28, 10, 1989–1993Publication Date (Print):May 1, 1989Publi…
The cellular photosensitivity caused by aluminum phthalocyanines sulfonated to different degrees (AlPcSn) has been investigated. The phototoxic effect increased with decreasing number of sulfonate groups on the macrocycle, with the exception of AlPcS1 which was less phototoxic than AlPcS2 but more phototoxic than AlPc…
The dehalogenation of lindane by a range of hemoproteins, porphyrins, and corrins has been tested under reducing conditions in the presence of dithiothreitol. In addition, a series of porphyrin-metal ion complexes have been prepared and have also been screened for the capacity to dehalogenate lindane. Hemoglobin, hemi…
Trends in interface debonding have been calculated during fiber pullout for composites with interfaces subject to residual tension. The debond behavior is shown to depend sensitively on the thermal expansion mismatch. The results are used as the basis for designing a pullout test specimen suitable for measuring the mi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of strontium analogs of barium yttrium cuprate perovskites via chemical substitutionSteven A. Sunshine, L. F. Schneemeyer, T. Siegrist, D. C. Douglass, J. V. Waszczak, R. J. Cava, E. M. Gyorgy, and D. W. MurphyCite this: Chem. Mater. 1989, 1, 3, 331–335Publicat…
Two series of rigid chain polyesters having flexible linear side chains from 6 to 16 carbon atoms were synthesized and studied by optical microscopy, differential scanning calorimetry, and X-ray diffraction. They were prepared by melt condensation polymerization of 2,5-dialkoxyhydroquinones with terephthalic acid in o…
Current-voltage characteristics have been obtained for various metal contacts formed on boron-doped diamond epitaxial film prepared on synthesized Ib diamond by the microwave plasma-assisted chemical vapor deposition method. Ti contacts and W contacts have exhibited good ohmic and Schottky properties, respectively. Fo…
Plasma emission actinometry has been used to study the mechanism by which small additions of oxygen (∼0.5%) enhance the rate of diamond deposition in a dilute (4%) CH4/H2 discharge at high temperature (900–1300 K). Increasing amounts of CH4 in the feed depress [H], while increasing the O2 concentration, up to ∼5%, pro…
ABSTRACT High-alloy stainless steels and nickelbase alloys offer great potential in revolutionizing well completion design by increasing allowable stress levels, removing corrosion inhibitor systems, and basically making it possible to do operations, not possible using conventional technology. Further, substantial sav…
Abstract Differences in the weathering characteristics of dolomitic limestones have resulted in the formation of Haplustalfs and Calciustolls located in the northwestern Colorado Plateau of Arizona. The establishment of effective porosity in the parent rock has controlled important pedogenic processes such as decalcif…
A general corrosion inhibition scheme for acetylenic alcohols and α, β-unsaturated aldehydes was found to be applicable to the α-alkenylphenone benzoyl allyl alcohol (BAA). The main features of the model are reversible adsorption of the protonated inhibitor and subsequent irreversible polymerization. The corrosion kin…
Fermat's principle of least time has some well-known limitations. It does not, for example, apply to diffraction gratings and holograms, because it does not include the concept of waves. The substitution of least number of waves in flight for least time of flight and the addition of a term that is a function of the gr…
Abstract Linear dichroism and fluorescence depolarization measurements on chlorophyll a and chlorophyll b molecules incorporated into macroscopically oriented multibilayers of the plant lipid digalactosyldiacylglycerol (DGDG) are presented. The results are combined with measurements of fluorescence anisotropy to obtai…
The synthesis of new di-Schiff bases with two non-mesogenic units and a flexible central spacer (‒CH2‒CH2‒) in their structure is reported. The mesomorphic properties of the compounds were investigated by differential scanning calorimetry (DSC) and polarizing microscopy. The Schiff bases derived from the aldehydes wer…