Hitoshi Miyasaka、Farzaneh Fadaei‐Tirani、C.S. Campos-Fernandez 等 4 位作者2001-02-28Inorganic Chemistry
The new metal-metal bonded diruthenium(II,III) compounds [Ru2(O2CCH3)4(mu-L)]infinity (L = N(CN)2-, 1; C(CN)3-, 2) and [[Ru2(O2CCH3)2(mhp)2]2(mu-DM-Dicyd)] (3) (mhp = 2-oxy-6-methylpyridinate, DM-Dicyd = 1,4-dicyanamido-2,5-dimethylbenzene dianion) have been synthesized and fully characterized. Compounds 1 and 2 were…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesInorganic Chemistry and Materials
Dustin J. Maxwell、Steven R. Emory、Shuming Nie2001-02-28Chemistry of Materials
We report the rational design and development of nanostructured thin-film materials that are highly efficient for surface-enhanced optical processes such as surface-enhanced Raman scattering (SERS). These materials consist of fractionated colloidal Ag particles in the size ranges of 30−50, 50−80, 80−100, and >100 nm.…
Protein Interaction Studies and Fluorescence AnalysisQuantum Dots Synthesis And PropertiesGold and Silver Nanoparticles Synthesis and Applications
Tetsuhiro Nemoto、Takashi Ohshima、Kentaro Yamaguchi 等 4 位作者2001-02-28Journal of the American Chemical Society
The catalytic asymmetric epoxidation of enones using the La-BINOL-Ph(3)As=O complex generated from La(O-i-Pr)(3), BINOL, and Ph(3)As=O in a ratio of 1:1:1 is described herein. Using 1-5 mol % of the asymmetric catalyst, a variety of enones, including a dienone and a cis-enone, were found to be epoxidized in a reasonab…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsPolyoxometalates: Synthesis and Applications
Yu. A. Izyumov、Yu. N. Skryabin2001-02-28Physics-Uspekhi
In this review the double exchange (DE) model forming a basis for the description of the physics of colossal magnetoresistance manganites is discussed. For a limiting case of exchange interaction which is large compared with the band width, the effective Hamiltonian of the DE model is derived from that of the sd-excha…
Advanced Condensed Matter PhysicsMagnetic and transport properties of perovskites and related materialsPhysics of Superconductivity and Magnetism
S. Andrieu、C. Chatelain、M. Lemine 等 5 位作者2001-02-28arXiv
In ferromagnetic thin films, the Curie temperature variation with the thickness is always considered as continuous when the thickness is varied from $n$ to $n+1$ atomic planes. We show that it is not the case for Fe in Fe/Ir superlattices. For an integer number of atomic planes, a unique magnetic transition is observe…
Materials Science
Stefano Fabris、Anthony T. Paxton、Michael W. Finnis2001-02-28arXiv
The high-temperature cubic-tetragonal phase transition of pure stoichiometric zirconia is studied by molecular dynamics (MD) simulations and within the framework of the Landau theory of phase transformations. The interatomic forces are calculated using an empirical, self-consistent, orthogonal tight-binding (SC-TB) mo…
Materials Science
E. Saito、T. Taknenobu、T. Ito 等 5 位作者2001-02-28arXiv
High-pressure resistivity experiments were performed on the recently discovered superconductor, MgB2. Tc decreases quasi-linearly with applied pressure to 1.4 GPa at a rate of -2.0(1) K/GPa, which is somewhat larger than that derived from recently-reported ac susceptibility measurements. The reduction of Tc is consist…
Materials Science
James P. Sethna2001-02-28arXiv
In this paper, we'll answer several abstract, formal questions about the nature of crack growth and nucleation. Bringing a field theory point of view to fracture illuminates things in what I hope will be an entertaining way. Formally, what is the crack nucleation rate? Fracture is an instability of elastic theory unde…
Materials Science
V. I. Bukhtiyarov、Mikhail G Slin'ko2001-02-28Russian Chemical Reviews
The reactivities of metallic nanosystems in catalytic processes are considered. The activities of nanoparticles in catalysis are due to their unique microstructures, electronic properties and high specific surfaces of the active centres. The problems of increasing the selectivities of catalytic processes are discussed…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsCatalysis and Hydrodesulfurization Studies
Jui‐Ming Yeh、Shir‐Joe Liou、Chiung-Yu Lai 等 5 位作者2001-02-28OpenAlex
A series of nanocomposite materials that consisted of emeraldine base of polyaniline and layered montmorillonite (MMT) clay were prepared by effectively dispersing the inorganic nanolayers of MMT clay in organic polyaniline matrix via in-situ polymerization. Organic aniline monomers were first intercalated into the in…
Polymer Nanocomposites and PropertiesConducting polymers and applicationsPolymer Nanocomposite Synthesis and Irradiation
U. Senthilkumar、R. Balaji、R. Arun Prasath 等 4 位作者2001-02-27Journal of Macromolecular Science Part A
2-(N-Phthalimido)ethanol (NPE) was prepared by reacting phthalic anhydride with ethanolamine in dimethy formamide medium. The NPE thus obtained was reacted with methacryloyl chloride in the presence of triethylamine to form the monomer, 2-(N-Phthalimido)ethyl methacrylate (NPEMA). Free radical polymerization technique…
Polymer Synthesis and CharacterizationSynthesis and properties of polymersAdvanced Polymer Synthesis and Characterization
Johan Evenäs、Anthony Mittermaier、Daiwen Yang 等 4 位作者2001-02-27Journal of the American Chemical Society
TROSY-based HN(CO)CA 2D and 3D pulse schemes are presented for measurement of (13)C(alpha)-(13)C(beta) dipolar couplings in high molecular weight (15)N,(13)C,(2)H-labeled proteins. In one approach, (13)C(alpha)-(13)C(beta) dipolar couplings are obtained directly from the time modulation of cross-peak intensities in a…
Amino Acid Enzymes and MetabolismEnzyme Structure and FunctionProtein Structure and Dynamics
Baohua Huang、Jon R. Parquette2001-02-27Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTEffect of an Internal Anthranilamide Turn Unit on the Structure and Conformational Stability of Helically Biased Intramolecularly Hydrogen-Bonded DendronsBaohua Huang and Jon R. ParquetteView Author Information Department of Chemistry The Ohio State University Columbus…
Luminescence and Fluorescent MaterialsChemical Synthesis and AnalysisDendrimers and Hyperbranched Polymers
R. Casalini、S. Capaccioli、M. Lucchesi 等 5 位作者2001-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A new equation describing the behavior of the structural relaxation time, tau(T,P), as a function of both pressure and temperature, is discussed. This equation has been derived from the Adam-Gibbs theory by writing the configurational entropy, S(c), in terms of the excess thermal heat capacity and of the molar thermal…
Material Dynamics and PropertiesPhase Equilibria and ThermodynamicsThermodynamic properties of mixtures
Taro Ishikawa、Oleg D. Lavrentovich2001-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
We visualize undulations in layered systems using a cholesteric stripe phase with a macroscopic supramicron periodicity. The wave vector of stripe pattern is in the cell's plane. The undulation is induced by an in-plane magnetic field normal to the stripes. The observed displacement of layers is much larger than the v…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesTheoretical and Computational Physics
V. V. Dudnik、Gleb B. Sukhorukov、Igor L. Radtchenko 等 4 位作者2001-02-27Macromolecules
A method is suggested for the coating of micron-sized particles by polymeric films based on surface-controlled precipitation. Polymer particles were coated by dextran and DNA in a water/ethanol mixture containing multivalent cations. A theoretical model for depositing polymers on colloidal particles is presented using…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesSurface Modification and Superhydrophobicity
Leo Radzihovsky、Erwin Frey、David R. Nelson2001-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
We investigate two-dimensional (2D) melting in the presence of a one-dimensional (1D) periodic potential as, for example, realized in recent experiments on 2D colloids subjected to two interfering laser beams. The topology of the phase diagram is found to depend primarily on two factors: the relative orientation of th…
Theoretical and Computational PhysicsMaterial Dynamics and PropertiesPickering emulsions and particle stabilization
Ulrik Boas、Annika J. Karlsson、Bas F. M. de Waal 等 4 位作者2001-02-27The Journal of Organic Chemistry
Five generations of poly(propylene imine) dendrimers have been modified by palmityl and adamantyl endgroups via a thiourea linkage. The synthesis of the thiourea dendrimers DAB-dendr-(NHCSNHAd)(n) and DAB-dendr-(NHCSNHC(16)H(33))(n) (n = 4, 8, 16, 32, 64) proceeds smoothly via the amino-terminated DAB dendrimer and th…
Luminescence and Fluorescent MaterialsChemical Synthesis and AnalysisDendrimers and Hyperbranched Polymers
Cristiano De Michele、D. Leporini2001-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The transport and relaxation properties of a molecular supercooled liquid on an isobar are studied by molecular dynamics. The molecule is a rigid heteronuclear biatomic system. The diffusivity is fitted over four orders of magnitude by the power law $D\ensuremath{\propto}(T\ensuremath{-}{T}_{c}{)}^{{\ensuremath{\gamma…
Phase Equilibria and ThermodynamicsRheology and Fluid Dynamics StudiesMaterial Dynamics and Properties
Cristiano De Michele、D. Leporini2001-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The rotational dynamics of a supercooled model liquid of rigid A-B dumbbells interacting via a Lennard-Jones potential is investigated along one single isobar. The time-temperature superposition principle, one key prediction of mode-coupling theory (MCT), was studied for the orientational correlation functions C(l). I…
Thermodynamic properties of mixturesMaterial Dynamics and PropertiesPhase Equilibria and Thermodynamics