Konstantinos Chondroudis、Timothy J. McCarthy、Mercouri G. Kanatzidis1996-01-01Inorganic Chemistry
The reaction of Pb and Eu with a molten mixture of A(2)Se/P(2)Se(5)/Se produced the quaternary compounds APbPSe(4), A(4)Pb(PSe(4))(2) (A = Rb,Cs), and K(4)Eu(PSe(4))(2). The red crystals of APbPSe(4) are stable in air and water. The orange crystals of A(4)Pb(PSe(4))(2) and K(4)Eu(PSe(4))(2) disintegrate in water and o…
Crystal Structures and PropertiesInorganic Chemistry and MaterialsX-ray Diffraction in Crystallography
Xiaojun Wang1996-01-01Journal of Biomedical Optics
The group refractive index and physical thickness of dry and hydrated type I collagen films are measured using optical low-coherence reflectometry. The average value for the group refractive index of dry and fully hydrated collagen films at lo = 850 nm is, respectively, 1.53 6 0.02, and 1.43 6 0.02. The physical thick…
Tendon Structure and TreatmentOptical Coherence Tomography ApplicationsCollagen: Extraction and Characterization
Marcus Müller、M. Schick1996-01-01Macromolecules
We study spatially ordered phases in a rod−coil diblock copolymer melt. In the weak segregation limit, we solve the self-consistent field equations by a partial numerical evaluation of the single chain partition function. In the strong segregation limit, we resort to a brushlike approximation. The structural asymmetry…
Theoretical and Computational PhysicsRheology and Fluid Dynamics StudiesBlock Copolymer Self-Assembly
Tomoko Yoshida、Tsunehiro Tanaka、Hisao Yoshida 等 5 位作者1996-01-01The Journal of Physical Chemistry
NiO−MgO samples (Ni x Mg 1- x O: x = moles of Ni/(moles of Ni + moles of Mg)) were prepared by impregnation of MgO powder with an aqueous solution of Ni(NO 3 ) 2, followed by calcination at 773 K. The dispersion of Ni ions in these samples has been studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (…
ZnO doping and propertiesMagnetic Properties and Synthesis of FerritesElectron and X-Ray Spectroscopy Techniques
Timothy J. Mason、E. Cordemans1996-01-01Pure (Coventry University)
Chemical activation and process intensification is provided through ultrasonically-induced cavitation in a liquid medium, a process often described as sonochemistry. Examples are chosen from a number of fields which illustrate the wide ranging applicability of this technology in the chemical and processing industries.…
Ultrasound and Cavitation Phenomena
Heiko Weiner、John D. Aiken、Richard G. Finke1996-01-01Inorganic Chemistry
An improved synthesis of the prototype polyoxoanion−organometallic-support system, P 2 W 15 Nb 3 O 62 9 -, as its organic solvent-soluble all-[( n -C 4 H 9 ) 4 N] + salt is described. The improvements result in a 30% faster procedure which also provides a 60% increase in yield of [( n -C 4 H 9 ) 4 N] 9 P 2 W 15 Nb 3 O…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions
Miroslaw Trznadel、Małgorzata Zagórska、Mieczysław Łapkowski 等 6 位作者1996-01-01Journal of the Chemical Society Faraday Transactions
Spectroelectrochemical behaviour of regioregular poly(3-octylthiophene) has been investigated using UV–VIS–NIR and Raman spectroscopies. Static and dynamic UV–VIS–NIR spectroelectrochemical experiments combined with cyclic voltammetry show that oxidative doping of the regioregular polymer is a two-step process in whic…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsElectrochemical Analysis and Applications
Yasushi Yokoyama、Soichi Uchida、Yayoi Yokoyama 等 5 位作者1996-01-01Journal of the American Chemical Society
Two new thermally irreversible photochromic ( R )-binaphthol-condensed indolylfulgides (with a 1-(1,2-dimethyl-3-indolyl)-2-methylpropylidene group and with a 1-(1,2-dimethyl-3-indolyl)butylidene group, 6 and 7, respectively) were synthesized. Because of rapid thermal equilibration between the conformational isomers o…
Photochromic and Fluorescence ChemistryBioactive Compounds and Antitumor AgentsSynthesis of Indole Derivatives
Lynne Katsikas、M. Gutiérrez、A. Henglein1996-01-01The Journal of Physical Chemistry
Mercury ions, Hg 2+, are radiolytically reduced in an aqueous silver sol. The plasmon absorption band of silver is blue-shifted, which is explained by the formation of a solid mercury layer around the silver particles. The metal deposition stops when the silver particles carry about two monolayers of mercury and the a…
Gold and Silver Nanoparticles Synthesis and Applications
María A. Grela、A. J. Colussi1996-01-01The Journal of Physical Chemistry
We report stochastic calculations in compact 2-D lattices modeling the competition between electron−hole recombination and reactive processes on the surface of illuminated TiO 2 colloidal particles. Computer simulations in which holes perform unbiased random walks, react with oxidizable donors, or neutralize stationar…
TiO2 Photocatalysis and Solar CellsQuantum Dots Synthesis And PropertiesElectrochemical Analysis and Applications
C. Labrèche、Isabelle Lévesque、J. Prud’homme1996-01-01Macromolecules
Tetraethylsulfamide (TESA), (CH 3 CH 2 ) 2 NSO 2 N(CH 2 CH 3 ) 2, is a nonvolatile liquid of moderate permittivity (ε = 29) that exhibits a good stability toward reducing agents. This glass-forming liquid ( T g = −111 °C) is compared to propylene carbonate (PC, ε = 65, T g = −110 °C) as diluent for PEO−LiN(CF 3 SO 2 )…
Advanced Battery Materials and TechnologiesPolymer Nanocomposites and PropertiesSynthesis and properties of polymers
Mitsuru Ueda、Tomonari Nakayama1996-01-01Macromolecules
A negative working photosensitive polyimide based on poly(hydroxyimide) (PHI), 2,6-bis(hydroxymethyl)-4-methylphenol (BHMP) as cross-linker, and photoacid generator diphenyliodonium 9,10-dimethoxyanthracene-2-sulfonate (DIAS) has been developed. The PHI was prepared by the ring-opening polyaddition of 4,4‘-hexafluoroi…
Synthesis and properties of polymersSilicone and Siloxane ChemistryPhotopolymerization techniques and applications
Claudio De Rosa、Finizia Auriemma、Paolo Corradini1996-01-01Macromolecules
The crystal structure of the stable crystalline form of syndiotactic polypropylene (s-PP) may be taken, only as a first approximation, as body-centered orthorhombic and described in the space group Ibca (in which the chains maintain their full, ideal 2 1 22 symmetry). Indeed, the splitting of the resonance of the meth…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Noboru Ono、Hideo Hironaga、Kazuo Ôno 等 8 位作者1996-01-01Journal of the Chemical Society Perkin Transactions 1
Pyrroles fused with aromatic rings (isoindole derivatives) have been readily prepared by the reaction of aromatic nitro compounds with ethyl isocyanoacetate in the presence of DBU. The ease of this reaction depends on the aromaticity of the starting nitro aromatics. Polycyclic aromatic nitro compounds such as 1-nitroa…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesLuminescence and Fluorescent Materials
P.J. Iriondo、J. J. Iruin、M. J. Fernández‐Berridi1996-01-01Macromolecules
Blends composed of poly(vinylphenol) (PVPh) and bacterial (tactic) poly(hydroxybutyrate) (PHB) and synthetic (atactic) poly(hydroxybutyrate) (PHBa) have been investigated by FTIR. From quantitative analyses of hydrogen bonded PHB carbonyl groups as a function of temperature and composition, the interassociation consta…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties
Antonino Gulino、Salvatore La Delfa、Ignazio L. Fragalà 等 4 位作者1996-01-01Chemistry of Materials
Low-temperature (400−800 °C) stabilization of tetragonal zirconia, prepared by a hydroxide gel route and low-temperature annealing, has been achieved by partial substitution of Zr 4+ with Bi 3+ . XRD and Raman spectroscopy have been used for characterization of the doped zirconia powders as well as for identification…
Advancements in Solid Oxide Fuel CellsNuclear materials and radiation effectsElectronic and Structural Properties of Oxides
Marina Ruths、Suzi Steinberg、Jacob N. Israelachvili1996-01-01Langmuir
The surface forces apparatus technique was used to measure the normal forces, thin film viscosity, and lateral (frictional) forces between two surfaces interacting across 4‘- n -octyl-4-cyanobiphenyl (8CB), to determine the effects of confinement (film thickness) and shear (sliding velocity) on the ordering of the sme…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsForce Microscopy Techniques and Applications
David D. Graf、John P. Campbell、Larry L. Miller 等 4 位作者1996-01-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSingle-Crystal X-ray Structure of the Cation Radical of 3',4'-Dibutyl-2,5''-diphenyl-2,2':5',2''-terthiophene: Definitive Evidence for π-Stacked Oxidized OligothiophenesDavid D. Graf, John P. Campbell, Larry L. Miller, and Kent R. MannView Author Information Department…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsPhotochromic and Fluorescence Chemistry
Dirk Vanderschueren、Naoki Yoshinaga、Kazuo Koyama1996-01-01ISIJ International
The deformed structure of cold rolled IF steels consists of a large number of α fibre and γ fibre oriented grains and a small number of (110)<110> oriented grains, each with a distinctive grain shape, subgrain structure, hardness and etching appearance. Early nucleation occurs mainly in γ fibre grains and (110)<110> g…
Microstructure and mechanical propertiesMetal and Thin Film MechanicsMicrostructure and Mechanical Properties of Steels
C. Depège、Fatima-Zahrae El Metoui、Claude Forano 等 6 位作者1996-01-01Chemistry of Materials
Layered double hydroxides containing silicate anions have been prepared using either a coprecipitation method or an anionic exchange reaction. The polymerization of the intercalated anions under moderate thermal treatment has been studied by PXRD, FTIR, and solid-state NMR. Grafting processes and layer condensation ha…
Polyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and ApplicationsInorganic Chemistry and Materials