L.G. Hubert-Pfalzgraf、S. Danièle、R. Papiernik 等 7 位作者1997-01-01Journal of Materials Chemistry
The reactions between Ti(OR) 4 (R=Et, Pr i ) or [Zr(OPr i ) 4 (Pr i OH)] 2 and various lead oxide precursors [anhydrous Pb(OAc) 2 , alkoxides or oxoalkoxides] have been investigated in different experimental conditions (solvent, temperature). Various mixed-metal species have been isolated in high yields and characteri…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisInorganic Chemistry and Materials
Jun‐ichi Tateiwa、Akihiko Kimura、Masaaki Takasuka 等 4 位作者1997-01-01Journal of the Chemical Society Perkin Transactions 1
Metal cation-exchanged montmorillonite (M n+ -mont) works in acetonitrile at 80 °C as a Lewis acid catalyst for the intermolecular carbonyl-ene reaction of α-methylstyrenes with paraformaldehyde to give the corresponding homoallylic alcohols, Zr 4+ -mont being the most effective of the many M n+ -mont catalysts examin…
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsSynthetic Organic Chemistry Methods
Matthias Epple、Oliver Herzberg1997-01-01Journal of Materials Chemistry
A method to prepare polyglycolide, the simplest polyester, with defined microstructure by solid-state polymerization of halogenoacetates is presented. By choosing the appropriate halogenoacetate it is possible to obtain polyglycolide with variable porosity. The pore size distribution can be varied by choice of the pre…
biodegradable polymer synthesis and propertiesSilicone and Siloxane Chemistry
Masakazu Iwamoto、Angel Martínez-Hernández、Tetsu Zengyo1997-01-01Chemical Communications
Intermediate addition of reductant (C 2 H 4 ) into an NO+O 2 stream between an oxidation catalyst for NO to NO 2 (Pt-MFI) and a reduction catalyst for NO x to N 2 (In-MFI), a so-called IAR method, is shown to be very effective in selectively reducing NO to N 2 in the presence of excess oxygen.
Catalytic Processes in Materials Science
Suk Bong Hong、Miguel Á. Camblor、Mark E. Davis1997-01-01Journal of the American Chemical Society
Four sodalite materials with Si/Al ratios of ∞, 23.0, 11.0, and 5.7 are synthesized from essentially nonaqueous media in which ethylene glycol is acting both as a solvent and as a structure-directing agent. Elemental and thermal analyses, X-ray powder diffraction, multinuclear MAS NMR, and vibrational spectroscopies a…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisClay minerals and soil interactions
Michael Rowe、Gao Min、S.G.K. Williams 等 7 位作者1997-01-01OpenAlex
The use of waste heat as an energy source for thermoelectric generation largely removes the constraint for the wide scale application of this technology imposed by its relatively low conversion efficiency (typically about 5%). Paradoxically, in some parasitic applications, a low conversion efficiency can be viewed as…
Advanced Thermoelectric Materials and DevicesEnvironmental Education and SustainabilityInnovative Energy Harvesting Technologies
Derek J. Chadwick、Janice A. Good、Francesco Ramirez1997-01-01Wiley eBooks
Partial table of contents: Molecular Biophysics of Elastin Structure, Function and Pathology (D. Urry, et al.). Ultrastructure of Elastin (I. Pasquali-Ronchetti, et al.). GENERAL DISCUSSION I: HYDROXYLATION OF THE PENTAPEPTIDE VGVPG IN OVINE ELASTIN. Structure of the Elastin Gene (J. Rosenbloom, et al.). Catalytic Pro…
Collagen: Extraction and Characterization
M. J. Mcvicar、W.J. Graves1997-01-01Canadian Society of Forensic Science Journal
In this preliminary study, the authors have developed a soil analysis method based on the automated particle search and classification capabilities of a scanning electron microscope equipped with an energy dispersive x-ray spectrometer (SEM-EDX). Innovative sample preparation maximized dispersion and density of soil p…
X-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis
Atsushi Yamamoto、Junpei Kawada、Toshifumi Yui 等 4 位作者1997-01-01Bioscience Biotechnology and Biochemistry
A well-defined X-ray fiber pattern of chitosan acetate was obtained by immersing a tendon chitosan, prepared from a crab tendon chitin by a solid-state N-deacetylation, in an aqueous acetic acid-isopropanol solution at 110°C. This pattern was very similar to that of chitosan salts with some inorganic acids, such as HF…
Nanocomposite Films for Food PackagingPolymer Surface Interaction Studies
Bertrand Donnio、Duncan W. Bruce1997-01-01Journal of the Chemical Society Dalton Transactions
Liquid-crystalline complexes of palladium and platinum are formed when the metals are complexed to stilbazoles (4-styrylpyridines) bearing either two or three alkoxy chains. The complexes, termed polycatenar, show smectic C mesophases for most 3,4-disubstituted ligands, while the use of trisubstituted ligands leads to…
Liquid Crystal Research AdvancementsPhotochemistry and Electron Transfer StudiesMolecular spectroscopy and chirality
Michaël S. Deleuze、Lorenz S. Cederbaum1997-01-01International Journal of Quantum Chemistry
The x-ray photoemission spectra of the ethylene, butadiene, and hexatriene compounds were investigated using one-particle Green's function calculations which are exact up to third order in correlation. This study points to the importance of initial-state correlation and cross-section effects for a consistent reproduct…
Advanced Chemical Physics StudiesCatalysis and Oxidation ReactionsElectron and X-Ray Spectroscopy Techniques
Ching S. Chang、Jian Gao1997-01-01Journal of Engineering Mechanics
Based on a microstructural approach, granular material can be represented by an equivalent continuum of the high-gradient type. The high-gradient model is used in this paper to study the effect of microstructure on the propagation of waves in granular material. The constitutive coefficients of the high-gradient contin…
Rock Mechanics and ModelingNonlocal and gradient elasticity in micro/nano structuresGeotechnical and Geomechanical Engineering
N. Essayem、R. Fréty、G. Coudurier 等 4 位作者1997-01-01Journal of the Chemical Society Faraday Transactions
Ammonia thermodesorption using a thermal conductivity detector does not allow an unambiguous study of the acidic properties of strong solid acids such as heteropolycompounds and sulfated zirconia. As a matter of fact, these strong acids release compounds other than NH 3 during TPD experiments which obviously involves…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions
Sarah Foley、Gurnos Jones、Raffaelle Liuzzi 等 6 位作者1997-01-01Journal of the Chemical Society Perkin Transactions 2
The synthesis, photophysical properties and singlet oxygen yields of a range of polyether substituted metallo and free-base phthalocyanines are reported and discussed in the context of the potential use of these compounds as alternatives to haematoporphyrin derivatives (HpD) in the photodynamic therapy (PDT) of cancer…
Nanoplatforms for cancer theranosticsPorphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research Studies
Katsumasa Suzuki、Yoshihiro Saito、Yoshikazu Tokuoka 等 5 位作者1997-01-01Journal of the American Oil Chemists Society
Abstract The volatility behavior of perfume compounds in poly(ethylene oxide)/poly(propylene oxide)/poly(ethylene oxide) copolymer was investigated by means of dynamic and static headspace analyses. Suppression of the volatility of perfume compounds by EO 105 PO 27 EO 105 copolymer was markedly greater than by polyeth…
Flame retardant materials and propertiesSilicone and Siloxane ChemistryPolymer Science and PVC
Christopher J. Chang、Donald W. Low、Harry B. Gray1997-01-01Inorganic Chemistry
Nitrogen atom transfer from salen-derived nitridomanganese(V) to manganese(III) Schiff-base complexes occurs under aerobic conditions in solution at room temperature. A mechanism involving chloride dissociation followed by the formation and decay of a binuclear μ-nitrido-activated complex accounts satisfactorily for t…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
W. H. Southwell1997-01-01Applied Optics
Optical interference coatings have been designed by using combinations of wavelets (fully apodized sine-wave refractive index groups). Like a single-line rugate filter, a single wavelet produces a stop band without harmonics and, in addition, has no sidelobes. The rules for combining wavelet refractive index structure…
Advanced Fiber Optic SensorsOptical Coatings and GratingsSurface Roughness and Optical Measurements
Herman le Roux、Leslie Glasser1997-01-01Journal of Materials Chemistry
Transferable potentials have been derived by computer modelling of the series of higher titanium oxides, from Ti 2 O 3 (with Ti 3+ ions) to TiO 2 (with Ti 4+ ions), and including the lower members of the series of phases, Ti n O 2n-1 , which have mixed oxidation states; some of these are described as crystallographic…
Inorganic and Organometallic ChemistryThermal and Kinetic AnalysisAdvanced Materials Characterization Techniques
Jean‐François Létard、S. Montant、Philippe Guionneau 等 9 位作者1997-01-01Chemical Communications
The first example of a spin-crossover iron(II) compound with a large negative third-order polarizability, associated with an instantaneous electronic response, is reported; magnetic measurements show that this compound, cis-bis(thio-cyanato)bis[N-(2-pyridylmethylene)aminobip henyl]iron(II), characterized by X-ray stru…
Magnetism in coordination complexesNonlinear Optical Materials ResearchElectron Spin Resonance Studies
Chunming Su、Donald L. Suarez1997-01-01Soil Science Society of America Journal
Abstract To predict B behavior in soils and its influence on plants, it is crucial to understand the mechanisms of B sorption by mineral phases. Because B reacts with clay minerals and Al and Fe oxides, it should also sorb to poorly crystalline aluminosilicates such as allophane. Boron sorption, with and following all…
Plant Micronutrient Interactions and EffectsClay minerals and soil interactionsIron oxide chemistry and applications