Yukinari Sunatsuki、Hiromitsu Shimada、T. Matsuo 等 7 位作者1998-09-26Inorganic Chemistry
The manganese(III) complex K[MnL(py)(2)].py (H(4)L = 1,2-bis(2-hydroxybenzamido)benzene, py = pyridine) reacted as a ligand complex at the two phenoxo oxygen atoms with metal(II) ion and 2,2'-bipyridine to give a series of heterometal complexes [Mn(MeOH)L(OH)M(bpy)](2) (M(II) = Zn (1); Cu (2); Ni (3); Mn (4)). X-ray s…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
T. Buffeteau、F. Lagugné Labarthet、Michel Pézolet 等 4 位作者1998-09-26Macromolecules
In situ dynamical study of the photoinduced orientation of the DR1 azobenzene derivative in a doped PMMA matrix and in p(DR1A- co -MMA) copolymers was carried out using real-time visible and infrared spectroscopies. The different mechanisms occurring during the photoisomerization cycles were highlighted by following t…
Liquid Crystal Research AdvancementsPhotochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistry
Hatsuo Ishida、Hong Yee Low1998-09-26Journal of Applied Polymer Science
A silane coupling agent with a benzoxazine functional group has been synthesized. A series of nonpolar solvents is found to favor benzoxazine monomer formation. Employing these nonpolar solvents, a high-purity benzoxazine functional silane coupling agent is obtained. The effectiveness of this silane coupling agent is…
Advanced Fiber Optic SensorsEpoxy Resin Curing ProcessesSynthesis and properties of polymers
Yoshihiko Misumi、Toshio Masuda1998-09-26Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorLiving Polymerization of Phenylacetylene by Novel Rhodium Catalysts. Quantitative Initiation and Introduction of Functional Groups at the Initiating Chain EndYoshihiko Misumi and Toshio MasudaView Author Information Department of Polyme…
Synthesis and Properties of Aromatic CompoundsSupramolecular Self-Assembly in MaterialsSurface Chemistry and Catalysis
O. I. Mićić、K. M. Jones、Andrew F. Cahill 等 4 位作者1998-09-26The Journal of Physical Chemistry B
Solid films consisting of close-packed arrays of InP quantum dots have been prepared by slowly evaporating colloidal solutions of InP quantum dots. The diameters of the quantum dots were controlled to be between about 30 to 60 Å; size-selective precipitation yielded a size distribution of about 10% about the mean diam…
Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Ekaterina B. Zhulina、Oleg V. Borisov1998-09-25Macromolecules
We have developed an analytical theory which describes the equilibrium structure of a polyelectrolyte brush interacting with oppositely charged sublayer. We consider sparsely grafted polyions with quenched charges that are immersed in a salt-free solution and form a brush of thickness H . An oppositely charged sublaye…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsElectrostatics and Colloid Interactions
David A. Langlois、Brian C. Benicewicz、Elliot P. Douglas1998-09-25Chemistry of Materials
A series of rigid-rod bispropargyl thermoset monomers have been synthesized. These monomers were examined by differential scanning calorimetry (DSC) and hot stage polarized optical microscopy. Enantiotropic or monotropic nematic liquid crystalline phases were observed for all but two monomers. Partial curing of these…
Liquid Crystal Research AdvancementsAdvanced Polymer Synthesis and CharacterizationPhotopolymerization techniques and applications
Biswajit Choudhury、Alan C. Weedon、James R. Bolton1998-09-25Langmuir
The photoelectrochemistry of two new groups of surfactant carboxyporphyrins is described. The surface active porphyrins deposited onto a SnO 2 semiconductor surface exhibit an unusual photoelectrochemical effect: a substantial and stable photocurrent/photovoltage is generated in modified photoelectrode cells that poss…
Photosynthetic Processes and MechanismsPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Zhaohui Lei、Anand S. Vaidyalingam、Prabir K. Dutta1998-09-25The Journal of Physical Chemistry B
Photochemical studies of molecules in the organized voids of microporous frameworks is an area of considerable research interest. In this study, we have examined the spectroscopy and photochemistry of trans -azobenzene introduced into the 8 Å channels of an aluminophosphate framework, AlPO 4 -5. The acidity of alumino…
Advanced Photocatalysis TechniquesPolyoxometalates: Synthesis and ApplicationsCovalent Organic Framework Applications
Enos A. Axtell、Ju‐Hsiou Liao、Mercouri G. Kanatzidis1998-09-25Inorganic Chemistry
From the reaction of Au with alkali metal polysulfide liquids, LiAuS and NaAuS were discovered. Orange crystals of LiAuS crystallize in the monoclinic space group C2/c, (no. 15), with a = 8.994(2) Å, b = 8.956(2) Å, c = 7.201(3) Å, beta = 128.68(1) degrees, and Z = 8. Light-yellow planks of NaAuS crystallize in the or…
Rare-earth and actinide compoundsIron-based superconductors researchInorganic Chemistry and Materials
J.A. Halfen、Jeffrey J. Bodwin、Vincent L. Pecoraro1998-09-25Inorganic Chemistry
Chiral 12-metallacrown-4 complexes can now be obtained in high yield using resolved β-phenylalanine hydroxamic acids as organic scaffolding. These new copper(II) compounds bear a striking resemblance based on size and shape to Cu(II) tetraphenylporphyrin. This suggests that metallacrowns may be useful alternatives to…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistrySurface Chemistry and Catalysis
G. E. Welsh、D.J. Blundell、Alan H. Windle1998-09-25Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Transient Liquid Crystalline Phase as a Precursor for Crystallization in Random Co-polyester FibersG. E. Welsh, D. J. Blundell, and A. H. WindleView Author Information Department of Materials Science and Metallurgy, University of…
Liquid Crystal Research AdvancementsTextile materials and evaluationsMaterial Properties and Processing
Shiou‐Jyh Hwu1998-09-25Chemistry of Materials
In an attempt to abstract the structural units of widely known silicate, phosphate, and arsenate compounds based on a transition-metal oxide (TM oxide) framework, we have gained some new insight into the study of “nanostructured” materials and their corresponding electronic and magnetic properties. In this review, we…
Luminescence Properties of Advanced MaterialsCrystal Structures and PropertiesAdvanced Condensed Matter Physics
Kazuyuki Ishii、Yoshiharu Hirose、Nagao Kobayashi1998-09-25Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSelective Population from the Excited Multiplet States to the Triplet Ground State in a Phthalocyanine: A New Concept for Controlling Magnetic Properties by PhotoexcitationKazuyuki Ishii, Yoshiharu Hirose, and Nagao KobayashiView Author Information Department of Chemis…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistrySynthesis and Properties of Aromatic Compounds
Brian K. Hubbard、Marjan Koch、David R. J. Palmer 等 5 位作者1998-09-25Biochemistry
The genes encoding the enzymes in the (D)-glucarate/galactarate catabolic pathway have been identified in the Escherichia coli genome. These encode, in three transcriptional units, (D)-glucarate dehydratase (GlucD), galactarate dehydratase, 5-keto-4-deoxy-(D)-glucarate aldolase, tartronate semialdehyde reductase, a gl…
Bacterial Genetics and BiotechnologyEnzyme Structure and FunctionBiochemical and Molecular Research
Johannes Elschner、G. Schmidt1998-09-25Mathematical Methods in the Applied Sciences
The aim of the paper is to provide the mathematical foundation of effective numerical algorithms for the optimal design of periodic binary gratings. Special attention is paid to reliable methods for the computation of diffraction efficiencies and of the gradients of certain functionals with respect to the parameters o…
Electromagnetic Scattering and AnalysisElectromagnetic Simulation and Numerical MethodsOptical Coatings and Gratings
Christine L. Maupin、David Parker、J. A. Gareth Williams 等 4 位作者1998-09-25Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCircularly Polarized Luminescence from Chiral Octadentate Complexes of Yb(III) in the Near-InfraredChristine L. Maupin, David Parker, J. A. Gareth Williams, and James P. RiehlView Author Information Department of Chemistry Michigan Technological University 1400 Townsen…
Magnetism in coordination complexesLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes
Loong‐Tak Lim、Yoshinori Mine、Marvin A. Tung1998-09-25Journal of Agricultural and Food Chemistry
A methodology for preparing biodegradable films from egg white proteins was developed in this study. Film formation was based on the partial denaturation of egg white proteins by a preheating treatment at pH 10.5, followed by enzymatic polymerization of the proteins at 50 °C, pH 8.2, using a Ca 2+ -independent microbi…
Proteins in Food SystemsNanocomposite Films for Food PackagingMicroencapsulation and Drying Processes
Arjen Boersma、J. van Turnhout、Michael Wübbenhorst1998-09-25Macromolecules
Dielectric relaxation analysis was carried out on the main chain thermotropic liquid crystalline copolyesteramide Vectra B950. The dielectric spectra of Vectra B950 show four relaxations, instead of three as cited in the literature. These correspond, from high to low temperature, to the glass transition, the rotation…
Liquid Crystal Research AdvancementsNonlinear Optical Materials ResearchMolecular spectroscopy and chirality
A. Hucht、K. D. Usadel1998-09-25arXiv
The reorientation transition of the magnetization of ferromagnetic films is studied on a microscopic basis within Heisenberg spin models. Analytic expressions for the temperature dependent anisotropy are derived from which it is seen that the reduced magnetization in the film surface at finite temperatures plays a cru…
Materials Sciencecond-mat.stat-mech