Yonezo Maeda、Hiroki Oshio、Y. Tanigawa 等 5 位作者1991-05-01Bulletin of the Chemical Society of Japan
Abstract Iron(III) complexes of [FeL]BPh4·acetone containing the hexadentate ligand derived from triethylenetetramine and salicylaldehyde have been synthesized. These complexes were grown in two crystalline forms, monoclinic and the twin crystals. The crystal structure of the monoclinic form was determined at 290 K, a…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
Y. U. Idzerda、G. A. Prinz1991-05-01Physical review. B, Condensed matter
The role of scattering of the incident excitation electrons is examined by use of judiciously chosen scattering geometries that allow for the experimental separation of incident-beam effects and Auger-electron-scattering effects. The scattering of 4-keV incident electrons can result in variations greater than 25% of t…
Advancements in Photolithography TechniquesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Achim Müller、Ralf Rohlfing、Joachim Döring 等 4 位作者1991-05-01Angewandte Chemie
Eine ellipsoidförmige Schale aus 30 verknüpften tetragonalen VO 5 ‐Pyramiden (Strukturbild rechts; gefüllte Kreise V, leere Kreise O), die einen verzerrten {V 4 O 4 }O 4 ‐Kubus umhüllt, liegt in der Titelverbindung vor. Dieser Cluster ist jedoch nicht nur topologisch von Interesse: Seine magnetischen Eigenschaften mac…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Shigeru Tasaka、N. Inagaki、Masaaki Igawa1991-05-01Journal of Polymer Science Part B Polymer Physics
Abstract The permeability of annealed poly ( l ‐(trimethylsilyl)‐ l ‐propyne) was studied from the viewpoint of structural information obtained from x‐ray diffraction and density. The sample cast from benzene solution had low density (0.82 g/cm 3 ) and high permeability, whereas the annealed sample had a higher densit…
Corrosion Behavior and InhibitionPolymer crystallization and propertiesSynthesis and properties of polymers
Jiannian Yao、B.H. Loo、Kazuhito Hashimoto 等 4 位作者1991-05-01Berichte der Bunsengesellschaft für physikalische Chemie
Abstract The photochromic responses of mixed WO 3 – MoO 3 thin films subjecting to UV irradiation were investigated in reducing environments, and they were compared with those of WO 3 and MoO 3 thin films. It was found that the photochromism of mixed 92% WO 8% MoO 3 thin film in ethanol vapor was significantly enhance…
Gas Sensing Nanomaterials and SensorsAdvanced Memory and Neural ComputingTransition Metal Oxide Nanomaterials
Chih‐Yung Chang、R.W. Vook1991-05-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Al films were vapor deposited in high vacuum onto SiO2/Si substrates at various substrate temperatures (T) and deposition rates (R) which ranged, respectively, from 24 to 250 °C and from 2 to 90 Å/s. The films were examined by scanning electron microscopy (SEM) and showed systematic variations in topography. Hillock f…
Metal and Thin Film MechanicsCopper Interconnects and ReliabilityOptical Coatings and Gratings
G. R. Hamed、Junjun Huang1991-05-01Rubber Chemistry and Technology
Abstract The bonding of several black-filled natural rubber vulcanizates to brass-plated steel cord was investigated using the TCAT pullout geometry. Compositions using either cobalt naphthenate or an HR bonding system (hexamethoxymethyl melamine plus RFR) had higher pullout forces than a control without these agents.…
Mechanical Behavior of CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Craig R. Johnson、Colleen M. Jones、Sanford A. Asher 等 4 位作者1991-05-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvaluation of the .pi.-bonding ability of imidazole: structure determination and characterization of catena-(H2O)2(1-CH3im)2Mg(.mu.-CN)(CN)4(1-CH3im)Fe(III).cntdot.H2O (1-CH3im = 1-methylimidazole)Craig R. Johnson, Colleen M. Jones, Sanford A. Asher, and Jaime E. AbolaCite t…
Metal-Organic Frameworks: Synthesis and ApplicationsCorrosion Behavior and InhibitionMagnetism in coordination complexes
T.C. Chou、A. Joshi1991-05-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Interfacial reactions of SiC with selected high temperature metals have been studied at temperatures between 1000 and 1200 °C for various times. The metals include Nb, a strong carbide former, Ni, Co, and stainless steel. Reactions of the metals with SiC in this temperature range were extensive; various metal silicide…
Advanced ceramic materials synthesisSilicon Carbide Semiconductor TechnologiesAluminum Alloys Composites Properties
Takahide Minami、Naoto Tamai、Tomoko Yamazaki 等 4 位作者1991-05-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPicosecond time-resolved fluorescence spectroscopy of the photochromic reaction of spiropyran in Langmuir-Blodgett filmsTakahide Minami, Naoto Tamai, Tomoko Yamazaki, and Iwao YamazakiCite this: J. Phys. Chem. 1991, 95, 10, 3988–3993Publication Date (Print):May 1, 1991Public…
Photochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research
Gordon W. Gribble、Daniel J. Keavy、Erik R. Olson 等 8 位作者1991-05-01Magnetic Resonance in Chemistry
Abstract 19 F chemical shifts are reported for a series of alkyl‐substituted fluoronaphthalenes and related compounds that exhibit steric crowding around the fluorine atom due to the proximity of methyl groups. Comparisons of these chemical shifts with others measured in similar compounds but without the corresponding…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesInorganic Fluorides and Related Compounds
David Guzonas、D. Boils、Michael L. Hair1991-05-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface force measurements of polystyrene-block-poly(ethylene oxide) adsorbed from a nonselective solvent on micaDavid Guzonas, Daniele Boils, and Michael L. HairCite this: Macromolecules 1991, 24, 11, 3383–3387Publication Date (Print):May 1, 1991Publication History Publishe…
Polymer Nanocomposites and PropertiesAnalytical Chemistry and SensorsLubricants and Their Additives
Edward T. Seidl、Henry F. Schaefer1991-05-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new configuration of 12-crown-4Edward T. Seidl and Henry F. Schaefer IIICite this: J. Phys. Chem. 1991, 95, 9, 3589–3590Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/doi/10.1021/j100162a02…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal Complexes
Kuiming Liang、György Bánhegyi、Frank E. Karasz 等 4 位作者1991-05-01Journal of Polymer Science Part B Polymer Physics
Abstract Thermal, dielectric, and mechanical relaxation measurements on miscible blends of polybenzimidazole (PBI) and a polyetherimide (PEI, Ultem 1000) prepared by solution casting from dimethylacetamide (DMAc) reveal a number of structurally related features. Annealing below the glass transition temperature induces…
Polymer Nanocomposites and PropertiesDielectric materials and actuatorsSynthesis and properties of polymers
R. A. M. Hikmet、B. H. Zwerver1991-05-01Molecular crystals and liquid crystals
Two-component liquid crystalline (LC) mixtures containing LC diacrylates and chiral molecules with no reactive groups were made. Upon photopolymerisation of the mixtures, cholesteric networks containing up to 28% w/w chiral molecules which were not chemically attached to the networks were created. Temperature dependen…
Liquid Crystal Research AdvancementsPorphyrin and Phthalocyanine ChemistryNonlinear Optical Materials Research
Armin de Meijere、Frank Jaekel、Arndt Simon 等 7 位作者1991-05-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyclynes. 9. Regioselective coupling of ethynylcyclopropane units: hexaspiro[2.0.2.4.2.0.2.4.2.0.2.4]triaconta-7,9,17,19,27,29-hexayneArmin De Meijere, Frank Jaekel, Arndt Simon, Horst Borrmann, Jurgen Koehler, Dan Johnels, and Lawrence T. ScottCite this: J. Am. Chem. Soc. 1…
Advanced Chemical Physics StudiesPorphyrin and Phthalocyanine ChemistrySynthesis and Properties of Aromatic Compounds
Spencer Knapp、T. G. Murali Dhar、Jennifer Albaneze 等 7 位作者1991-05-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced porphyrin-to-quinone electron transfer across oligospirocyclic spacersSpencer Knapp, T. G. Murali Dhar, Jennifer Albaneze, Steve Gentemann, Joseph A. Potenza, Dewey Holten, and Harvey J. SchugarCite this: J. Am. Chem. Soc. 1991, 113, 10, 4010–4013Publication Dat…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesSurface Chemistry and Catalysis
Jianlin Shi、Jianhua Gao、Zu‐Xiang Lin 等 4 位作者1991-05-01Journal of the American Ceramic Society
Fully agglomerated superfine zirconia powders were prepared with the coprecipitation and spray‐drying method. The compaction of such powders shows no fragmentation of the agglomerates. The sintering behavior of the compacts was studied and two sintering stages were identified: densification within agglomerates at temp…
Advanced ceramic materials synthesisCatalytic Processes in Materials ScienceMaterial Dynamics and Properties
A. Haoudi‐Mazzah、Ahmed Mazzah、Hans‐Georg Schmidt 等 5 位作者1991-05-01Zeitschrift für Naturforschung B
Reaction of (tBu) 2 Si(OH) 2 with TiCl 4 , TiBr 4 , TiI 4 , and ZrCl 4 affords eight-membered rings 2a-2d. The X-ray structural analysis of 2a, 2b and 2d reveals in 2a and 2b tetrahedral and in 2d octahedral coordination at the transition metal atoms. The octahedral geometry in 2d is due to two additional coordinated…
Synthesis and characterization of novel inorganic/organometallic compoundsCarbon dioxide utilization in catalysisSilicone and Siloxane Chemistry
Jeffrey T. Kohli、James E. Shelby1991-05-01Journal of the American Ceramic Society
The present study is a comparison of the properties of rare‐earth aluminogermanate and rare‐earth aluminosilicate glasses. Several properties have been measured, including density, transformation temperature, softening point, thermal expansion, Vickers hardness, magnetic susceptibility, Verdet constant, and IR transmi…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsNuclear materials and radiation effects