Enrique Colacio、José M. Domı́nguez-Vera、Mustapha Ghazi 等 6 位作者2000-01-01Journal of the Chemical Society Dalton Transactions
Two bimetallic assemblies K[Cu(cyclam)][Fe(CN)6]·4H2O 1 and [Cu(L)][Cu(L1)][Fe(CN)6]·6.5H2O 2 (cyclam = 1,4,8,11-tetraazacyclotetradecane; L = N,N′-bis(2-pyridylmethylene)-1,3-propanediamine and L1 = N-2-pyridylmethylene-1,3-propanediamine) have been prepared from the reaction of [Fe(CN)6]3− and the precursors [Cu(cyc…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Jong‐Sung Yu、Jeong Yeon Kim、Seungho Lee 等 6 位作者2000-01-01Chemical Communications
Alternate adsorption of anionic and cationic polyelectrolytes creates smooth organic films on the walls of template-grown Au nanowires, which can be made chemically reactive on their ends by removal of a sacrificial Ag layer.
Gold and Silver Nanoparticles Synthesis and ApplicationsPolymer Surface Interaction StudiesBlock Copolymer Self-Assembly
Marco Cavazzini、Amedea Manfredi、Fernando Montanari 等 5 位作者2000-01-01Chemical Communications
Sterically hindered chiral (salen)manganese complexes bearing long perfluoroalkyl substituents are synthesized and successfully employed as catalysts in the enantioselective (ee = 50–87%) epoxidation of alkenes under fluorous biphasic conditions.
Porphyrin and Phthalocyanine ChemistrySynthetic Organic Chemistry MethodsMetal-Catalyzed Oxygenation Mechanisms
T.G. Leighton、Ben Cox、A.D. Phelps2000-01-01The Journal of the Acoustical Society of America
Key to the dynamics of the type of bubble collapse which is associated with such phenomena as sonoluminescence and the emission of strong rebound pressures into the liquid is the role of the liquid inertia. Following the initial formulation of the collapse of an empty spherical cavity, such collapses have been termed…
Ultrasound and Hyperthermia ApplicationsUltrasound and Cavitation PhenomenaNuclear Physics and Applications
Shadpour Mallakpour、Abdol‐Reza Hajipour、Mohammad Reza Zamanlou2000-01-01Journal of Polymer Science Part A Polymer Chemistry
3,3′,4,4′-benzophenonetetracarboxylic dianhydride (4,4′-carbonyldiphathalic anhydride) was reacted with L-leucine in a mixture of acetic acid and pyridine (3 : 2), and the resulting imide-acid [N,N′-(4,4′-carbonyldiphthaloyl)-bis-L-leucine diacid] was obtained in quantitative yield. The compound was converted to the N…
Synthetic Organic Chemistry MethodsChemical Synthesis and ReactionsSynthesis and properties of polymers
R.C. Finn、Jon Zubieta2000-01-01Chemical Communications
The hydrothermal reactions of Cu2O, the appropriate polypyridine ligand, Na3VO4, H3PO4 and H2O at 200 °C yield the two-dimensional material [{Cu(bpy)}2(VO)3- (PO4)2(HPO4)2]·2H2 O and the one-dimensional phosphate [{Cu(terpy)}2(VO2)3(PO4 )(HPO4)2], examples of the structure-directing role of secondary metal–ligand subu…
Crystal Structures and PropertiesPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Characterization
Yen-Sheng Su、T. A. Kaplan、S. D. Mahanti 等 4 位作者2000-01-01Physical review. B, Condensed matter
We find that an ab initio electronic structure calculation in the Hartree-Fock approximation (HFA) leads to the experimentally observed magnetic and orbital orderings in ${\mathrm{LaMnO}}_{3},$ as well as its insulating character. While such agreement was also found in density-functional theories (DFT's), there are la…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
T.M. Barclay、Robin G. Hicks、Martin T. Lemaire 等 4 位作者2000-01-01Chemical Communications
Magnetic susceptibility measurements on a structurally characterized nickel(II) complex of a tridentate verdazyl radical indicate very strong ferromagnetic Ni–verdazyl intramolecular exchange interactions (J > +200 cm−1).
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Robert G. Hauser、E. Bauer、E. Gratz 等 10 位作者2000-01-01Physical review. B, Condensed matter
The thermodynamic and transport properties of the ${\mathrm{Er}}_{1\ensuremath{-}x}{\mathrm{Y}}_{x}{\mathrm{Co}}_{2}$ system were studied in the concentration range $0.0<~x<~1.0.$ In this system, the first-order magnetic phase transition observed in ${\mathrm{ErCo}}_{2}$ at ${T}_{\mathrm{C}}=32$ K is related to…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsMagnetic Properties of Alloys
V. John Hindson、P.C.E. Moody、Arthur J. Rowe 等 4 位作者2000-01-01Journal of Biological Chemistry
Equilibrium sedimentation studies show that the serine acetyltransferase (SAT) of Escherichia coli is a hexamer. The results of velocity sedimentation and quasi-elastic light scattering experiments suggest that the identical subunits are loosely packed and/or arranged in an ellipsoidal fashion. Chemical cross-linking…
Enzyme Structure and FunctionAmino Acid Enzymes and MetabolismBiochemical and Molecular Research
Kiyoshi Kanie、Takayasu Yasuda、Takashi Kato 等 4 位作者2000-01-01Chemical Communications
Thermotropic discotic and smectic liquid crystallinity can be induced for folic acid derivatives having octadecyl and undecyl substituents in wide temperatures ranges, respectively; the addition of sodium triflate to smectic liquid-crystalline folic acid leads to a change of the assembled structures from smectic to co…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality
Cengiz Caner、R. J. Hernandez、Melvin A. Pascall2000-01-01Packaging Technology and Science
This study investigated the effects of high pressure processing (HPP) on the barrier properties of eight multilayer films. Pouches made from these films were filled with distilled water, sealed and then pressure processed at 600 and 800 MPa for 5, 10 and 20 min at 45°C. Controls were similarly prepared but exposed to…
Surface Modification and SuperhydrophobicityFlame retardant materials and propertiesTribology and Wear Analysis
C. N. R. Rao、Anupama Ranganathan、V.R. Pedireddi 等 4 位作者2000-01-01Chemical Communications
A novel compound of the formula Ag2·CA (CA = cyanuric acid) possessing Ag sheets and hydrogen-bonded CA chains, exhibits anisotropic conductivity and acts as an infinite parallel plate capacitor with a high dielectric constant.
Ionic liquids properties and applicationsMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
Kazunari Yoshizawa、Takashi Yumura、Yoshihito Shiota 等 4 位作者2000-01-01Bulletin of the Chemical Society of Japan
Abstract The so-called ``α-oxygen" on Fe-ZSM-5 zeolite, a surface oxygen species responsible for high reactivity in oxidation of methane and of benzene, has been investigated. We present from density-functional-theory (DFT) calculations how such a reactive surface species is generated upon decomposition of dinitrogen…
Catalytic Processes in Materials ScienceCatalysts for Methane ReformingCatalysis and Oxidation Reactions
Xiaoyi Gong、Liming Dai、Hans J. Griesser 等 4 位作者2000-01-01Journal of Polymer Science Part B Polymer Physics
We covalently immobilized poly(ethylene oxide) (PEO) chains onto a fluorinated ethylene propylene copolymer (FEP) surface. On the FEP surface, aldehyde groups were first deposited by plasma polymerization of acetaldehyde or acrolein. Then, amino-PEO chains were immobilized through Schiff base formation, which was foll…
Surface Modification and SuperhydrophobicityElectrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction Studies
Michael Rajamathi、G. Nataraja、Sharath Ananthamurthy 等 4 位作者2000-01-01Journal of Materials Chemistry
The layered double hydroxide (LDH) of Mg with Al decomposes at 450 °C to yield a mixed metal oxide. The oxide reconstructs back to the parent LDH either on cooling in air or soaking in water. This reversible thermal behaviour was attributed to the formation of an unstable defect rocksalt phase (comprising Al3+ ions pa…
Layered Double Hydroxides Synthesis and ApplicationsThermal Expansion and Ionic ConductivityMagnesium Oxide Properties and Applications
Aijuan Gu、Feng‐Chih Chang2000-01-01Journal of Applied Polymer Science
A novel polyimide (PI)/clay hybrid nanocomposite, designated as PI (PAAS)/CM, has been developed from the poly(amic acid) salt of triethylamine and organomontmorillonite (CM) using a mixture solution of tetrahydrofuran (THF) and methanol (MeOH). For comparison, two other PI/clay hybrids derived from poly(amic acid) an…
Polymer Nanocomposites and PropertiesSynthesis and properties of polymersTribology and Wear Analysis
Mukul Biswas、Suprakas Sinha Ray2000-01-01Journal of Applied Polymer Science
The polymerization of aniline (ANI) in aqueous medium in the presence of (NH4)2S2O8 and montmorillonite (MMT) resulted in the formation of a nanocomposite (PANI–MMT). The inclusion of PANI in the composite was confirmed by FTIR studies. The extent of PANI loading in the composite increased with ANI concentration at a…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Dashun Zhang、Bao‐Qing Ma、Tianzhu Jin 等 6 位作者2000-01-01New Journal of Chemistry
Reaction of Ln(ClO4)3 (Ln=Nd or Gd) with L-serine at pH 6.0 yielded the aqua hexanuclear clusters [Nd6(μ6-O)(μ3-OH)8(H2O)24](ClO4)8·6 H2O (1) and [Gd6(μ6-O)(μ3-OH)8(H2O)24](ClO4)8·6 H2O (2). They are isomorphous and comprised of a regular octahedron of 6 lanthanide ions encapsulating a μ6-O2− anion and capped by a μ3-…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesPolyoxometalates: Synthesis and Applications
Theo M. Nieuwenhuizen2000-01-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A picture for thermodynamics of the glassy state was introduced recently by us [Phys. Rev. Lett. 79, 1317 (1997); 80, 5580 (1998)]. It starts by assuming that one extra parameter, the effective temperature, is needed to describe the glassy state. This approach connects responses of macroscopic observables to a field c…
Material Dynamics and PropertiesTheoretical and Computational PhysicsAdvanced Thermodynamics and Statistical Mechanics