Dirk G. Kurth、Pit Lehmann、Dirk Volkmer 等 5 位作者2000-01-01Journal of the Chemical Society Dalton Transactions
A detailed analysis of the supramolecular architecture of the nanoporous surfactant-encapsulated cluster (SEC) with the empirical formula (DODA)40(NH4)2[(H2O)n ⊂ Mo132O372(CH3CO2)30(H2O)72] 1 (n ≈ 50) is presented. The open framework architecture of the Keplerate cluster is investigated by means of small angle neutron…
Polyoxometalates: Synthesis and ApplicationsNanocluster Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis
Ayae Sugawara‐Narutaki、Takashi Kato2000-01-01Chemical Communications
Aragonite thin films of calcium carbonate have been deposited on chitosan matrices by cooperation of chitosan, poly(aspartate) and MgCl2 in CaCO3 solution, and their double layered composite structures are obtained by the alternate operations of chitosan coating and thin-film crystallization.
Bone Tissue Engineering MaterialsCorrosion Behavior and InhibitionCalcium Carbonate Crystallization and Inhibition
В.В. Хартон、Andrei V. Kovalevsky、A.P. Viskup 等 7 位作者2000-01-01Journal of The Electrochemical Society
(CGO) and (LSM) possess similar thermal expansion coefficients and were thus combined in dual‐phase membranes for oxygen separation. Studies of oxygen permeation through CGO‐LSM composite ceramics, containing similar volume fractions of the phases, showed that the oxygen transfer is limited by the bulk ionic conductiv…
Ferroelectric and Piezoelectric MaterialsAdvancements in Solid Oxide Fuel CellsMagnetic and transport properties of perovskites and related materials
Michel Le Bras、Michel Bugajny、Jean‐Marc Lefebvre 等 4 位作者2000-01-01Polymer International
This work deals in the first part, with the fire retardancy of polypropylene (PP)/thermoplastic polyurethane (TPU)/ammonium polyphosphate (APP) intumescent blends, using TPU with different chemical compositions. The influence of the chemical nature of the polyol used in the synthesis of the TPU on the fire resistance…
Polymer Nanocomposites and PropertiesFire dynamics and safety researchFlame retardant materials and properties
Andrew Beeby、Rachel S. Dickins、Simon FitzGerald 等 9 位作者2000-01-01Chemical Communications
A palladium porphyrin has been covalently linked to a chiral lanthanide complex and effectively sensitises near-IR emission from Nd and Yb; sensitisation is enhanced in the absence of oxygen and in the presence of a nucleic acid.
Magnetism in coordination complexesLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes
A.V. Kityk、W. Schranz、Peter Sondergeld 等 6 位作者2000-01-01Physical review. B, Condensed matter
To clarify the inconsistencies in existing elastic constant data of ${\mathrm{SrTiO}}_{3}$ in the vicinity of the 105 K phase transition we have studied the temperature dependence of the Young's modulus of ${\mathrm{SrTiO}}_{3}$ crystals. Dynamic mechanical analysis at 10--140 K and 10--45 Hz has been used for the exp…
Ferroelectric and Piezoelectric MaterialsForce Microscopy Techniques and ApplicationsAcoustic Wave Resonator Technologies
Zoran S. Petrovi、Andrew Guo、Wei Zhang2000-01-01Journal of Polymer Science Part A Polymer Chemistry
Four polyols were prepared by a ring opening of epoxidized soybean oil with HCl, HBr, methanol, and by hydrogenation. Two series of polyurethanes were prepared by reacting the polyols with two commercial isocyanates: PAPI and Isonate 2143L. Generally, the properties of the two series were similar. The crosslinking den…
Polymer composites and self-healingLignin and Wood ChemistryThermal and Kinetic Analysis
Jian‐Hua Yin、Bei Jiang、Wenwu Cao2000-01-01IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
The elastic, piezoelectric, and dielectric properties of a 0.955Pb(Zn(1/3)Nb(2/3))O(3)-0.045PbTiO(3 ) (PZN-4.5%PT) multi-domain single crystal, poled along [001] of the original cubic direction, have been determined experimentally using combined resonance and ultrasonic methods. At room temperature, the PZN-4.5%PT sin…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis
Claudia M. Cardona、Sandra Mendoza、Angel E. Kaifer2000-01-01Chemical Society Reviews
A few examples of molecules containing a redox active core surrounded by an organic sheath have been synthesized recently. The redox nucleus may be attached covalently to the structure’s core or held there by noncovalent forces. This review article surveys the electrochemical behavior of such redox centers, emphasizin…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryElectrochemical Analysis and Applications
Qiang Wang、Qiliang Yan、Paul F. Nealey 等 4 位作者2000-01-01The Journal of Chemical Physics
Thin films of symmetric diblock copolymers confined between two hard, flat and homogeneous surfaces have been investigated by means of Monte Carlo simulations on a simple cubic lattice. For such simulations, the match between bulk lamellar period L0 and the simulation box size is crucial to obtain meaningful results.…
Material Dynamics and PropertiesTheoretical and Computational PhysicsBlock Copolymer Self-Assembly
Baojian Zhang、Sean A. Davis、Stephen Mann 等 4 位作者2000-01-01Chemical Communications
Ordered macroporous zeolite fibres are prepared from the infiltration of swollen bacterial supercellular threads with as-synthesized silicalite nanoparticles.
Mesoporous Materials and CatalysisSupramolecular Self-Assembly in MaterialsDiatoms and Algae Research
Michael Rajamathi、P. Vishnu Kamath、Ram Seshadri2000-01-01Journal of Materials Chemistry
In addition to the well-known α and β modifications, nickel hydroxide is shown to exist in a number of poorly crystalline forms—clearly distinguishable by their signature X-ray powder diffraction patterns. DIFFaX simulations combined with compositional analysis and IR spectral data indicate that these are interstratif…
Layered Double Hydroxides Synthesis and ApplicationsMicrowave Dielectric Ceramics SynthesisMagnesium Oxide Properties and Applications
Matjaž Valant、Peter K. Davies2000-01-01Journal of the American Ceramic Society
The effect of the chemical substitution of Ti, Zr, and Gd cations on the structure and properties of bismuth‐based pyrochlores was investigated for (Bi 1.5 Zn 1.0 Nb 1.5 )O 7 and Bi 2 (Zn 2/3 Nb 4/3 )O 7 . Broad ranges of solid solutions based on cubic (Bi 1.5 Zn 1.0 Nb 1.5 )O 7 were observed for Ti and Zr cations: (B…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisNuclear materials and radiation effects
A. Manceau、V. A. Drits、Bruno Lanson 等 8 位作者2000-01-01American Mineralogist
The crystallochemical structure of reduced Garfield nontronite was studied by X-ray absorption pre-edge and infrared (IR) spectroscopy, powder X-ray diffraction, polarized extended X-ray absorption fine structure (P-EXAFS) spectroscopy, and texture goniometry. Untreated and highly reduced (>99% of total Fe as Fe 2+…
Geological and Geochemical AnalysisConcrete and Cement Materials ResearchClay minerals and soil interactions
Rob G. H. Lammertink、Mark A. Hempenius、J. E. van den Enk 等 6 位作者2000-01-01Advanced Materials
The deposition of thin films of inorganic nanoclusters as a route to one-step lithography has been achieved using block copolymers with inherent inorganic (Fe and Si) components. Nanodomains of the organometallic part are resistant to removal during the subsequent O2 etch, which results in well-ordered and separate do…
Block Copolymer Self-Assembly
Eva Rud、Odrun A. Gederaas、Anders Høgset 等 4 位作者2000-01-01Photochemistry and Photobiology
5-aminolevulinic acid (5-ALA) and its ester derivatives are used in photodynamic therapy as precursors for the formation of photosensitizers. This study relates to the mechanisms by which 5-ALA is transported into cells. The transport of 5-ALA has been studied in a human adenocarcinoma cell line (WiDr) by means of [14…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesPorphyrin Metabolism and Disorders
Alexander Laskin、Hai Wang、Chung K. Law2000-01-01International Journal of Chemical Kinetics
The high-temperature kinetics of 1,3-butadiene oxidation was examined with detailed kinetic modeling. To facilitate model validation, flow reactor experiments were carried out for 1,3-butadiene pyrolysis and oxidation over the temperature range 1035–1185 K and at atmospheric pressure, extending similar experiments fou…
Advanced Combustion Engine TechnologiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
William R. Sanderson2000-01-01Pure and Applied Chemistry
Abstract Recent research progress in catalytic systems for potential use with hydrogen peroxide in industrial chemical synthesis is reviewed, with special focus on work published in the last five years. The main types of chemistry employed are critically appraised regarding their suitability for industrial exploitatio…
Catalytic Processes in Materials SciencePolyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation Reactions
Martin M. Frank、Marcus Bäumer2000-01-01Physical Chemistry Chemical Physics
The properties of metal clusters and nanoparticles are attracting more and more attention in fundamental and applied research. The application of such structures in heterogeneous catalysis is a particularly important area. Nevertheless, there is only limited fundamental knowledge about the dependence of adsorption beh…
Advanced Chemical Physics StudiesCatalytic Processes in Materials Sciencenanoparticles nucleation surface interactions
Sergey Vyazovkin2000-01-01New Journal of Chemistry
Various effects that liquid and solid media produce on the experimental activation energy of a reaction involving a single chemical step are discussed. The effects are experimentally observed as significant variations in the activation energy with temperature or extent of reaction. Since these phenomena are inconsiste…
Polymer crystallization and propertiesThermal and Kinetic AnalysisPhotopolymerization techniques and applications