Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Analysis: X-ray Photoelectron Spectroscopy and Auger Electron SpectroscopyNoel H. Turner and John A. SchreifelsCite this: Anal. Chem. 1994, 66, 12, 163–185Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb Initio Crystal Structure Determination of VO(H2PO2)2.cntdot.H2O from X-ray and Neutron Powder Diffraction Data. A Monodimensional Vanadium(IV) HypophosphiteA. Le Bail, M. D. Marcos, and P. AmorosCite this: Inorg. Chem. 1994, 33, 12, 2607–2613Publication Date (Print):June…
Abstract Poly( N ‐vinyl‐2‐pyrrolidone) (PVP) was blended with poly[styrene‐ co ‐(4‐hydroxytyrene)] (PSH) which was obtained from the random copolymer poly[styrene‐ co ‐(4‐acetoxystyrene)] (PSA). The miscibility of PVP/PSH blends in a composition 1 : 1 by weight was evaluated by differential scanning calorimetry (DSC),…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Percolation View of Novolak Dissolution. 3. Dissolution InhibitionHsiao-Yi Shih, Tung-Feng Yeh, Arnost Reiser, Ralph R. Dammel, Hans J. Merrem, and Gerhard PawlowskiCite this: Macromolecules 1994, 27, 12, 3330–3336Publication Date (Print):June 1, 1994Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of .alpha.- and .beta.-Silicon Atoms on the Free Energies of C-H Homolysis and HeterolysisM. J. Bausch and Yong GongCite this: J. Am. Chem. Soc. 1994, 116, 13, 5963–5964Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published iniss…
The 0.02M strontium chloride (SrCl2) and 0.05M citric acid solution (Sr‐citrate) was developed for the simultaneous determination of availability indices for plant nutrients from soils. The objective of this study was to compare the Sr‐citrate extracting solution with water, 0.002M SrCl2, 0.1M barium chloride (BaCl2),…
A new figure-of-merit function for full-profile fitting of powder patterns has been tested using the neutron diffraction data file for PbSO4, distributed during the first part of the Rietveld Refinement Round Robin organized by the Commission on Powder Diffraction of the International Union of Crystallography, and the…
The mechanics of impact by a high-speed liquid jet onto a solid surface covered by a liquid layer is described. After the liquid jet contacts the liquid layer, a shock wave is generated, which moves toward the solid surface. The shock wave is followed by the liquid jet penetrating through the layer. The influence of t…
The protective effect of oxide scales is strongly linked with their behaviour under mechanical loading. Scale cracking may occur at relatively low strains and a decisive part is played by the process of scale crack healing due to ongoing oxidation. It can even be maintained that many technical high temperature materia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIron(III) Porphyrin Complexes with Axial Alkyl and Acyl Ligands. Structures and Reactivity of the Acyl Complex toward DioxygenAlan L. Balch, Marilyn M. Olmstead, Nasser Safari, and Tamara N. St. ClaireCite this: Inorg. Chem. 1994, 33, 13, 2815–2822Publication Date (Print):Ju…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of Heat treatment on Properties of Poly(3-alkylthiophene)Masahiro Nakazono, Tsuyoshi Kawai, and Katsumi YoshinoCite this: Chem. Mater. 1994, 6, 6, 864–870Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994h…
Abstract A novel type of block copolymers comprising both side‐chain and main‐chain liquid‐crystalline (LC) blocks in the same macromolecular structure was synthesized and studied. The former block was either one of two LC polymethacrylates containing an azobenzene mesogen with different substituents (block A), and th…
For large deformations, the governing equations of elastic-plastic flow may lose their hyperbolicity and become ill posed at some critical values of the hardening modulus. This ill-posedness is characterized by uncontrolled growth of the amplitude of plane wave solutions in certain directions. To capture post-critical…
PbS microcrystallites show strong quantum confinement effects on account of the fact that the particle size is much smaller than the exciton Bohr radius, leading to large blue shifts of the optical absorption edge and the transverse optical phonon frequencies. In addition, femtosecond pump-probe experiments find a tra…
Motivated by difficulties in understanding the magnetism of the insulating parent of high-${\mathit{T}}_{\mathit{c}}$ supeconductors, we have studied the less covalent, and thus simpler, antiferromagnetic (AF) insulators NiO and ${\mathrm{KNiF}}_{3}$. We also consider the apparently covalent material ${\mathrm{La}}_{2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of Metal-meso-Octaethylporphyrinogen Complexes Leading to Novel Oxidized Forms of Porphyrinogen Other than Porphyrins. 2. The Redox Chemistry of Iron(II- and Cobalt(II)-meso-Octaethylporphyrinogen Complexes Occurring with the Formation and Cleavage of Two Cycloprop…
Femtosecond pump-probe experiments performed on squaraines demonstrate strong couplings between the first excited state and high-lying two-photon states. The experimental data agree well with our earlier quantum many-electron calculations based on multiple-excited configuration interactions. We show that high-lying tw…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Structure of the New Gold Polytelluride Anion [Au2Te12]4-Sandeep S. Dhingra and Robert C. HaushalterCite this: Inorg. Chem. 1994, 33, 13, 2735–2737Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994ht…
The kinetics of the reaction of directionally solidified eutec‐tics of yttrium‐aluminum perovskite and alumina to yttrium‐aluminum garnet were measured between 1150° and 1550°C for times as long as 20 000 min. Deformation from the 11 vol% increase was observed. Samples were characterized by optical microscopy, SEM, an…
Liquid crystalline properties of the four families with the general formula: where X = NO2, Cl, Br, F, have been investigated. Among these compounds nematic, smectic A and smectic B mesophases were found. These phase situations are compared with the isomeric families with the reversed -N=CH- central group.