Andrzej Ożarowski、Yu Shunzhong、Bruce R. McGarvey 等 5 位作者1991-08-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR and NMR study of the spin-crossover transition in bis(4,4'-bi-1,2,4-triazole)bis(thiocyanato)iron hydrate and bis(4,4'-bi-1,2,4-triazole)bis(selenocyanato)iron hydrate. X-ray structure determination of Fe(4,4'-bi-1,2,4-triazole)2(SeCN)2.cntdot.H2OAndrzej Ozarowski, Yu Sh…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Andréa Caneschi、Fabrizio Ferraro、Dante Gatteschi 等 5 位作者1991-08-01Inorganic Chemistry
A novel compound formed by copper(II) and a nitronyl nitroxide radical of formula [Cu(hfac)2]3(NITpPy)2 (where hfac = hexafluoroacetylacetonato and NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide) was synthesized. It crystallizes in the monoclinic system, space group C2/c, with a 36.540 (9) angstr…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Bernhard Weßling1991-08-01Polymer Engineering and Science
Abstract A new dispersion/flocculation phase transition model for the conductivity jump at the critical volume concentration of a conductive phase in an insulating matrix polymer is discussed. New experimental‐data including: SEM evaluations of the “seam” structure, excess pyrolytic residue analysis, BET measurements…
Polymer Nanocomposites and PropertiesHigh voltage insulation and dielectric phenomenaElectrostatics and Colloid Interactions
Paul W. Brown、Nancy Hocker、S.L. Hoyle1991-08-01Journal of the American Ceramic Society
Both the kinetics and the microstructure of monolithic hydroxyapatite formed by a low‐temperature dissolution and precipitation reaction strongly depend on the conditions in solution during the reaction. The relationships between the molar ratio of the particulate reactants (dicalcium phosphate and tetracalcium phosph…
Crystallization and Solubility StudiesThermal and Kinetic AnalysisX-ray Diffraction in Crystallography
R. C. Tennyson1991-08-01Canadian Journal of Physics
This paper describes the operation and performance of an atomic-oxygen (AO) beam facility developed at the University of Toronto Institute for Aerospace Studies (UTIAS), capable of providing ground-state neutral oxygen atoms at ~ 2.2 eV for flux levels as high as ~ 10 16 atoms (cm 2 s) −1 . Results are presented on th…
Catalytic Processes in Materials SciencePlasma Diagnostics and ApplicationsSilicone and Siloxane Chemistry
C.-T. Chen、B.S. Skerry1991-08-01CORROSION
Four organic coatings of commercial grade (polyurethane, epoxy-polyamide, medium-quality and low-cost alkyds) with an expected range of corrosion protective properties were applied to steel substrates and immersed for up to 4,300 h in 0.6 M NaCl solution. These painted electrodes were assessed by AC impedance in the f…
Corrosion Behavior and InhibitionConcrete Corrosion and DurabilityNon-Destructive Testing Techniques
N. S. Vandamme、Audrey E. Sutherland、Lori Jones 等 5 位作者1991-08-01Journal of the American Ceramic Society
The tetragonal tungsten bronze (TTB) type of Sr x Ba 1− x m Nb 2 O 6 (SBN) (0.5 ≤ x ≤ 0.75) was synthesized by a mixed‐oxide route. Using the two‐step densification process of pressureless sintering followed by oxygen HIPing, transparent ceramics were successfully fabricated. Microstructural, dielectric, optical, and…
Ferroelectric and Piezoelectric MaterialsGlass properties and applicationsPhotorefractive and Nonlinear Optics
Evangelos Dalas、Jannis Kallitsis、Petros G. Koutsoukos1991-08-01Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization of hydroxyapatite on polymersEvangelos Dalas, Jannis K. Kallitsis, and Petros G. KoutsoukosCite this: Langmuir 1991, 7, 8, 1822–1826Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https://pub…
Calcium Carbonate Crystallization and Inhibition
Holger Bengs、O. Karthaus、Helmut Ringsdorf 等 6 位作者1991-08-01Liquid Crystals
The induction of a nematic columnar phase in a discotic hexagonal ordered phase forming system is achieved by mixing hexakispentyloxytriphenylene 1 with a long chain derivative of trinitrofluorenone 3. The difference in chain length has a strong influence on the packing behaviour due to steric effects. The long hydroc…
Liquid Crystal Research AdvancementsMathematics and Applications
Klaüs Praefcke、D. Singer、Bernd Kohne 等 6 位作者1991-08-01Liquid Crystals
Two large pentakis(phenylethynyl)phenyl alkyl ethers, without side chains as is usual for discotic systems, were synthesized in palladium catalysed one pot coupling reactions. These low molecular weight and non-liquid-crystalline electron donor compounds were doped with 2,4,7-trinitrofluorenone under the formation of…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsSynthesis and Properties of Aromatic Compounds
Wolfgang A. Herrmann、Paul Kiprof、Kristin Rypdal 等 9 位作者1991-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultiple bonds between main-group elements and transition metals. 86. Methyltrioxorhenium(VII) and trioxo(.eta.5-pentamethylcyclopentadienyl)rhenium(VII): structures, spectroscopy and electrochemistryWolfgang A. Herrmann, Paul Kiprof, Kristin Rypdal, Janos Tremmel, Richard B…
Corrosion Behavior and InhibitionPolyoxometalates: Synthesis and ApplicationsInorganic and Organometallic Chemistry
Hiroshi Morisaki、F. W. Ping、Hiroshi Ono 等 4 位作者1991-08-01Journal of Applied Physics
Strong photoluminescence with sub-band-gap photon energies has been observed in fine Si particles prepared by the gas-evaporation technique. After surface oxidation, the Si particles show above-band-gap photoluminescence, the band tail covering the visible light region. The amount of the increased apparent band gap (0…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsNear-Field Optical Microscopy
Hiroyuki Mori、Hiroshi Ishiwara1991-08-01Japanese Journal of Applied Physics
A novel epitaxial growth method of SrTiO 3 films on Si(100) substrates is presented in which, in order to reduce the surface oxide layers of the substrates, thin Sr layers are deposited prior to deposition of SrTiO 3 films. It has been shown that the film composition becomes nearly stoichiometric when single-crystalli…
Physics of Superconductivity and MagnetismSemiconductor materials and devicesElectronic and Structural Properties of Oxides
M. R. Fitzsimmons、J. A. Eastman、M. Müller-Stach 等 4 位作者1991-08-01Physical review. B, Condensed matter
Quantitative x-ray-diffraction measurements of ultrafine-grained (nanocrystalline) Pd samples and a coarse-grained polycrystalline reference foil were obtained using synchrotron radiation. The intensity profiles of the Bragg reflections from the nanocrystalline samples were considerably better represented by Lorentzia…
Microstructure and mechanical propertiesMetal and Thin Film MechanicsMetal Alloys Wear and Properties
Pei Yu、Olivier Kahn、Keitaro Nakatani 等 6 位作者1991-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of a molecular-based ferromagnet through polymerization reaction in the solid state of manganeseII copperII molecular units. Crystal structure of MnCu(obze)(H2O)4.cntdot.2H2O (obze = oxamido-N-benzoato-N'-ethanoato)Yu Pei, Olivier Kahn, Keitaro Nakatani, Epiphane Codj…
Metal-Organic Frameworks: Synthesis and ApplicationsMetal complexes synthesis and propertiesMagnetism in coordination complexes
John C. Angus、Yong Wang、Mahendra K. Sunkara1991-08-01Annual Review of Materials Science
This article reviews published data on the mechanical properties of additively manufactured metallic materials. The additive manufacturing techniques utilized to generate samples covered in this review include powder bed fusion (e.g., EBM, SLM, DMLS) and ...Read More
Diamond and Carbon-based Materials ResearchTheoretical and Computational Physics
I Jy Chang、Harry B. Gray、Jay R. Winkler1991-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-driving-force electron transfer in metalloproteins: intramolecular oxidation of ferrocytochrome c by Ru(2,2'-bpy)2(im)(his-33)3+I Jy Chang, Harry B. Gray, and Jay R. WinklerCite this: J. Am. Chem. Soc. 1991, 113, 18, 7056–7057Publication Date (Print):August 1, 1991Publi…
Metal complexes synthesis and propertiesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Chiheng Chu、Mark P. D’Evelyn、Robert H. Hauge 等 4 位作者1991-08-01Journal of Applied Physics
The mechanism of diamond growth by hot-filament chemical vapor deposition (CVD) was investigated on the (100), (111), and (110) crystal faces of natural diamond by competition studies using carbon-13-labeled methane and carbon-12 acetylene. Homoepitaxial growth rates of 0.4, 0.5, and 1.3 μm/h were obtained for growth…
Metal and Thin Film MechanicsHigh-pressure geophysics and materialsDiamond and Carbon-based Materials Research
Th. Fink、J.-P. Dath、R. Imbihl 等 4 位作者1991-08-01The Journal of Chemical Physics
The reaction of NO and CO on Pt(100) exhibits two branches of steady state production of N2 and CO2 and the occurrence of kinetic oscillations. This system was studied under steady flow conditions in the 10−6 mbar total pressure range using low-energy electron diffraction-(LEED), work function measurement, and mass sp…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceNonlinear Dynamics and Pattern Formation
Yoshinori Naruta、Fumito Tani、Nobuo Ishihara 等 4 位作者1991-08-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic and asymmetric epoxidation of olefins with iron complexes of twin-coronet porphyrins. A mechanistic insight into the chiral induction of styrene derivativesYoshinori Naruta, Fumito Tani, Nobuo Ishihara, and Kazuhiro MaruyamaCite this: J. Am. Chem. Soc. 1991, 113, 1…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsOrganic Chemistry Cycloaddition Reactions