Achim Müller、Samar K. Das、Vladimir P. Fedin 等 8 位作者1999-06-21Zeitschrift für anorganische und allgemeine Chemie
The blue mixed-crystal title compound Na15[MoMoO462H14 (H2O)70]0.5[MoMoO457H14 · (H2O)68]0.5 · ca. 400 H2O ≡ Na15[1 a]0.5[1 b]0.5 · ca. 400 H2O 1, which crystallizes in the triclinic space group P 1 (a = 30.785(2), b = 32.958(2), c = 47.318(3) Å, α = 90.53(1), β = 89.86(1), γ = 96.85(1)°, V = 47665(6) Å3, Z = 2, Dcalc…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsInorganic Chemistry and Materials
Amir A. Farajian、Keivan Esfarjani、Yoshiyuki Kawazoe1999-06-21Physical Review Letters
The electronic and phase-coherent transport properties of doped carbon nanotube junctions are studied. It is shown that there are regions of negative differential resistance in the $I\ensuremath{-}V$ characteristic of small radius metallic tubes, which are not seen for semiconducting tubes. Their origin, as discussed,…
Carbon Nanotubes in CompositesGraphene research and applicationsMolecular Junctions and Nanostructures
A. de Andrés、M. Garcı́a-Hernández、J. L. Martı́nez 等 4 位作者1999-06-21Applied Physics Letters
We have performed magnetic and transport measurements on La0.7Ca0.3MnO3 polycrystalline pellets and thin films. We propose a model that reproduces very well the low-field and high-field magnetoresistance at low temperature. The decrease of the resistance at high fields is modeled by the opening of new conduction chann…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Claudio Donati、Sharon C. Glotzer、Peter H. Poole1999-06-21Physical Review Letters
We define a correlation function that quantifies the spatial correlation of single-particle displacements in liquids and amorphous materials. We show that for an equilibrium liquid this function is related to fluctuations in a bulk dynamical variable. We evaluate this function using computer simulations of an equilibr…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesTheoretical and Computational Physics
Natalie Pavlenko1999-06-21arXiv
Peierls-type instabilities in quarter-filled ($\bar{n}=1/2$) and half-filled ($\bar{n}=1$) quantum double-well hydrogen-bonded chain are investigated analytically in the framework of two-stage orientational-tunnelling model with additional inclusion of the interactions of protons with two different optical phonon bran…
Materials Sciencecond-mat.stat-mech
D. A. Walters、Lars M. Ericson、M. J. Casavant 等 7 位作者1999-06-21OpenAlex
We have induced large elastic strains in ropes of single-wall carbon nanotubes, using an atomic force microscope in lateral force mode. Freely suspended ropes were observed to deform as elastic strings with tension proportional to elongation. Ropes were elastically deformed over >10 cycles without showing signs…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsNanotechnology research and applications
Lev D. Gelb、Keith E. Gubbins1999-06-20Molecular Physics
We have prepared a series of model porous glasses using a recently developed molecular dynamics procedure (Gelb, L. D. and Gubbins, K. E., 1998, Langmuir, 14, 2097) that mimics the experimental processes that produce Vycor and controlled pore glasses. Using Grand Canonical Monte Carlo simulations we have measured nitr…
Glass properties and applicationsMesoporous Materials and CatalysisCatalysis and Oxidation Reactions
F. Martinet、J. Guillot1999-06-20Journal of Applied Polymer Science
α-methylstyrene–methyl methacrylate emulsion copolymerizations have been investigated at various temperatures (60, 70, 85°C) on the whole composition range. The kinetic behavior has been studied, such as conversion, particle size, and the average number of radicals per particle (ñ), as well as the following characteri…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationMaterial Dynamics and Properties
Yongqi Feng、Xing Jin1999-06-20Journal of Applied Polymer Science
The effect of self-nucleation on the crystallization and melting behavior of isotactic polypropylene (i-PP) and low ethylene content propylene–ethylene copolymers were investigated. Isothermal crystallization kinetics were studied using the Avrami equation and Lauritzen-Hoffman nucleation theory. It was found that sel…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
J. X. Li、W. L. Cheung1999-06-20Journal of Applied Polymer Science
Monoclinic (α) and hexagonal (β) polypropylene (α- and β-PP) were stained in the vapor of a ruthenium tetroxide solution prepared in situ. The effect of staining on the fusion behavior was investigated using a DSC. A staining duration between 10 and 24 h was found suitable for obtaining a good electron contrast betwee…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Jin Kuk Kim、Jin W. Park1999-06-20Journal of Applied Polymer Science
The disposal of used car tires has become a major environmental problem, especially in densely populated countries that use motor vehicles as the principle means of transportation. Widespread recycling of waste tires has not taken place because it has not proven to be cost effective. Although there are obvious environ…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesLignin and Wood Chemistry
Changwoon Nah、Je Hwan Park、Choon Tack Cho 等 5 位作者1999-06-20Journal of Applied Polymer Science
The specific heats of rubber compounds are very important not only for the thermodynamic calculations in various rubber processings; mixing, extrusion, calendering, and vulcanization, etc., but also for the service life of the final products under repeated stressing conditions. In this study, the specific heats of var…
Polymer crystallization and propertiesMaterial Dynamics and PropertiesPolymer Nanocomposites and Properties
C. Breen、Alexander Moronta1999-06-19The Journal of Physical Chemistry B
SWy-2 (Wyoming), STx-1 (Texas), and SAz-1 (Cheto, Arizona) montmorillonite and Sap-Ca saponite (California) were treated with different amounts of 12 M HCl and 1 M tetramethylammonium (TMA + ) chloride solution at room temperature. The catalytic activity of these hybrid acid-activated organoclays (AAOCs) was directly…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisClay minerals and soil interactions
Simon L. McGurk、Rebecca J. Green、Giles H.W. Sanders 等 7 位作者1999-06-19Langmuir
We have used albumin-modified atomic force microscope (AFM) tips to probe interactions with a range of hydrophilic polymer brush surfaces and protein. Copolymers of poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) (PEO−PPO−PEO) (Pluronics) adsorbed onto polymer interfaces have been shown in previous stu…
Polymer Surface Interaction StudiesMolecular Junctions and NanostructuresForce Microscopy Techniques and Applications
Boris I. Kharisov、L. M. Blanco、Leticia M. Torres‐Martínez 等 4 位作者1999-06-19Industrial & Engineering Chemistry Research
Several methods for the synthesis of metal-free phthalocyanine (Pc or PcH 2 ) and copper phthalocyanine (PcCu) from urea and phthalic anhydride, phthalimide, 1,3-diiminoisoindoline (1,3-D), and phthalonitrile have been studied. The results show that the nature of the solvent is the most important factor in the convent…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsOxidative Organic Chemistry Reactions
Duane A. Friesen、Toru Kajita、Earl Danielson 等 4 位作者1999-06-19Inorganic Chemistry
As pointed out recently for the sulfoxidation of thioethers, 9 the most interesting aspect of oxidations with in situ generated unstable peroxynitrous acid is the short reaction time.Short reaction times may well be a crucial factor in the case of sulfur compounds of pharmaceutical and biological interest, which are n…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Stephan Glaus、Gion Calzaferri1999-06-19The Journal of Physical Chemistry B
Single-crystal or very compact AgCl materials are hardly light sensitive. In presence of adsorbed Ag + ions, AgCl precipitates with their correspondingly large surface area, however, lead to the discovery of photography on paper by Henry Fox Talbot in 1834 and were recently found to act as a catalyst for sustained pho…
Catalytic Processes in Materials ScienceCopper-based nanomaterials and applicationsNanocluster Synthesis and Applications
Darshan Ranganathan、C. Lakshmi、Isabella L. Karle1999-06-19Journal of the American Chemical Society
The design, synthesis, and characterization of amino acid-based cyclic bisureas, a new class of macrocyclic peptides, are described. These cystine-based macrocycles are constructed by a single-step procedure involving condensation of 1,ω-alkane diisocyanate[(CH 2 ) n (NCO) 2; n = 4, 6, 12] with either the simple l -cy…
Luminescence and Fluorescent MaterialsSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
Ryo Tamaki、Yoshiki Chujo1999-06-19Chemistry of Materials
We investigated the synthesis of nanometer scale homogeneous polystyrene and silica gel polymer hybrids utilizing ionic interactions. The partially sulfonated polystyrene (10 mol %) was used as a starting organic polymer and (3-aminopropyl)trimethoxysilane (APTMOS) was used as a countercation as well as the precursor…
Polymer Nanocomposites and PropertiesMesoporous Materials and CatalysisSilicone and Siloxane Chemistry
Andrzej Rajca、Suchada Rajca、Jirawat Wongsriratanakul1999-06-19Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTVery High-Spin Organic Polymer: π-Conjugated Hydrocarbon Network with Average Spin of S ≥ 40Andrzej Rajca, Suchada Rajca, and Jirawat WongsriratanakulView Author Information Department of Chemistry University of Nebraska Lincoln, Nebraska 68588-0304 Cite this: J. Am. C…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLuminescence and Fluorescent Materials