Materials Literature
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First-principles full potential nonrelativistic calculations of the total energy of fcc Cu for various deformations of the cubic unit cell give values of the three elastic constants of fcc Cu in good agreement with experiment. Use is made of simple formulas for the strain energy of tetragonal and trigonal deformations…
The carrier-doping (or band-filling) dependence of electronic states has been investigated in the perovskitelike titanate compounds, ${\mathrm{La}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{TiO}}_{3}$ and ${\mathrm{Y}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ca}}_{\mathit{x}}$${…
Im kg‐Maßstab können reine Polypropylenimin‐Dendrimere in einer äußerst einfachen Reaktionssequenz aus Michael‐Addition (primäre Amine an Acrylnitril) und heterogener Hydrierung mit Raney‐Cobalt als Katalysator hergestellt werden. Beide Schritte verlaufen quantitativ und selektiv und können auf viele Kern‐ und Endgrup…
Hetero-metal assemblies, (NBu4=tetra(n-butyl)ammonium ion; ox=oxalate ion; M(II)=Ni(1), Fe(2), Mn(3), Zn(4)) have been synthesized by the use of [Fe(ox)3]3- as the building block. 1 and 2 are ferrimagnets of TN=43 and 28 K, respectively. 3 is an antiferromagnet. 4 shows a paramagnetic behavior.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSodium and silver environments and ion-exchange processes in silicate and aluminosilicate glassesS. N. Houde-Walter, J. M. Inman, A. J. Dent, and G. N. GreavesCite this: J. Phys. Chem. 1993, 97, 37, 9330–9336Publication Date (Print):September 1, 1993Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDouble-decker actinide porphyrins and phthalocyanines. Synthesis and spectroscopic characterization of neutral, oxidized, and reduced homo- and heteroleptic complexesK. M. Kadish, G. Moninot, Y. Hu, D. Dubois, A. Ibnlfassi, J. M. Barbe, and R. GuilardCite this: J. Am. Chem.…
The power of combined quick EXAFS (QuEXAFS) and X-ray diffraction as a structural and kinetic tool in high-temperature solid-state chemistry is exemplified by the study of the conversion of Mg2+-exchanged zeolite B to cordierite, a process facilitated by trace amounts of zinc oxide. With a setup consisting of a positi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and solution properties of hydrophobically modified ethoxylated urethanes with variable oxyethylene spacer lengthsJ. Philip Kaczmarski and J. Edward GlassCite this: Macromolecules 1993, 26, 19, 5149–5156Publication Date (Print):September 1, 1993Publication History…
Interface‐related degradation problems in PbZr x Ti 1 − x O 3 (PZT) thin‐ film nonvolatile memories have led to the search for alternate electrode materials to replace the conventional metal electrodes. In this work, the suitability of ceramic electronic conductors [ e.g. , ruthenium oxide ( RuO 2 ) and indium‐tin‐oxi…
Thin films of (Ba 0.65 Sr 0.35 )TiO 3 (BST) have been prepared by an rf-sputtering method at substrate temperatures of 500 to 700°C. The dielectric constant of these films ranges from 190 to 700 at room temperature. This value changes with the grain size rather than the film thickness. The dielectric constant of about…
This paper concentrates on two areas of information about diffraction gratings for students and instructors of instrumental analysis: the mathematical analysis typically found in books on optics and information that adds interest and a fresh perspective to the study and selection of diffraction gratings: a description…
The title compounds were prepared and characterized by X-ray powder diffraction, scanning electron microscopy, vibrational and electronic spectroscopy, and magnetic susceptibility measurements. Indirect evidence supports polymeric one-dimensional chain structures involving double pyrazolate bridges linking pseudo-tetr…
Metal filled organic and EMI coatings affect the fire performance properties of engineering plastics. Zinc arc spray, zinc/epoxy, and zinc borate/epoxy coatings on modified-polyphenylene oxide (m-PPO) are particu larly effective. The results from non-flaming NBS smoke chamber tests show a dramatic reduction in smoke f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThree novel Zintl phases in the magnesium-lanthanum-antimony system based on intergrowth of LaSb and Mg3Sb2 slabsAshok K. Ganguli, Young Uk Kwon, and John D. CorbettCite this: Inorg. Chem. 1993, 32, 20, 4354–4359Publication Date (Print):September 1, 1993Publication History P…
Abstract (NH 4 ) 3 [La(CH 3 COO) 6 ] · 1/2 H 2 O erhält man in Form von Einkristallen durch Erhitzen von La 2 O 3 bzw. La(CH 3 COO) 3 · 1,5 H 2 O mit einem Überschuß von Ammoniumacetat in Methanol. Die Röntgenstrukturanalyse (trigonal, R 3 , Z = 6, a = 1 365,0(3) pm, a = 2 360(1) pm, R = 0,088, R w = 0,061 zeigt, daß…
Abstract Einkristalle der wasserfreien Seltenerd‐Acetate mit Lutetium (Typ 1) und Holmium (Typ 2) wurden aus den verdünnt essigsauren Lösungen ihrer Oxide durch Aussalzen mit Caesiumacetat bei ca. 120°C erhalten. Die Kristallstrukturen [Lu(CH 3 COO) 3 : orthorhombisch, a = 825,85(8), b = 1 398,1(2), c = 823,9(1) pm, V…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColored merocyanine aggregates: long-lived crystals of large size (10-100 .mu.m) and deaggregation of small aggregates in solutionsYoshiyuki Onai, Michiko Mamiya, Toshio Kiyokawa, Kenichi Okuwa, Makoto Kobayashi, Hisanori Shinohara, and Hiroyasu SatoCite this: J. Phys. Chem.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFactors governing the charge density wave patterns of layered transition-metal compounds of octahedral coordination with d2 and d3 electron countsCarme Rovira and Myung Hwan WhangboCite this: Inorg. Chem. 1993, 32, 19, 4094–4097Publication Date (Print):September 1, 1993Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleDecacyclene: a molecular propeller with helical crystalsDouglas M. Ho and Robert A. Pascal, Jr.Cite this: Chem. Mater. 1993, 5, 9, 1358–1361Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.acs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStrength of incompatible amorphous polymer interfacesJulious L. Willett and Richard P. WoolCite this: Macromolecules 1993, 26, 20, 5336–5349Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.…