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Toward an Accurate Determination of 195Pt Chemical Shifts by Density Functional Computations: The Importance of Unspecific Solvent Effects and the Dependence of Pt Magnetic Shielding Constants on Structural Parameters

Mariusz Sterzel、Jochen Autschbach2006-03-25Inorganic Chemistry

Density functional theory using the zero-order regular approximate two-component relativistic Hamiltonian has been applied to calculate the 195Pt chemical shifts for the complexes [PtCl6]2-, [PtCl4]2-, and [Pt2(NH3)2Cl2((CH3)3CCONH)2(CH2COCH3)]Cl. It is demonstrated that, in contrast to recent findings by other author…

Metal complexes synthesis and propertiesMagnetism in coordination complexesMolecular spectroscopy and chirality

Micelle Directed Synthesis of Polyoxometalate Nanoparticles and Their Improved Catalytic Activity for the Aerobic Oxidation of Sulfides

Galia Maayan、Ronit Popovitz‐Biro、Ronny Neumann2006-03-25Journal of the American Chemical Society

Micelle directed polyoxometalate nanoparticles were synthesized by depositing H3+xPVxMo12-xO40 (x = 0, 2) by precipitation on micelles prepared from cesium dodecyl sulfate. The cryo-TEM image showed particles of about approximately 10 nm roughly consistent with the particle size computed from an idealized model. HRTEM…

Catalytic Processes in Materials SciencePolyoxometalates: Synthesis and ApplicationsCatalysis and Hydrodesulfurization Studies

Effect of TiO2 Crystalline Phase Composition on the Physicochemical and Catalytic Properties of Pd/TiO2 in Selective Acetylene Hydrogenation

Joongjai Panpranot、Kunyaluck Kontapakdee、Piyasan Praserthdam2006-03-25The Journal of Physical Chemistry B

Pd/TiO(2) catalysts have been prepared using TiO(2) supports consisting of various rutile/anatase crystalline phase compositions. Increasing percentages of rutile phase in the TiO(2) resulted in a decrease in Brunauer-Emmett-Teller surface areas, fewer Ti(3+) sites, and lower Pd dispersion. While acetylene conversions…

Catalytic Processes in Materials ScienceCatalysis for Biomass ConversionCatalysis and Hydrodesulfurization Studies

Advanced Drug Delivery Systems That Target The Vascular Endothelium

Bi‐Sen Ding2006-03-25Molecular Interventions

Targeted drug delivery to endothelial cells lining the vascular lumen will provide effective, precise and safe therapeutic interventions for treatment of diverse disease conditions. Rational design of such drug delivery systems (DDS) includes the following intertwined tasks: 1) selection of proper target determinants…

Nanoparticle-Based Drug DeliveryRNA Interference and Gene DeliveryCell Adhesion Molecules Research

Dependence of Copper Species on the Nature of the Support for Dispersed CuO Catalysts

Antonella Gervasini、Maela Manzoli、Gianmario Martra 等 7 位作者2006-03-25The Journal of Physical Chemistry B

Copper catalysts prepared by chemisorption-hydrolysis technique over silica (Cu/Si) and silica-alumina (Cu/SiAl) supports were studied to understand the role of the support on the nature and surface properties of the copper species stabilized on their surfaces. The morphological and surface properties of the copper ph…

Catalytic Processes in Materials ScienceCopper-based nanomaterials and applicationsNanomaterials for catalytic reactions

Amphiphilic Gold Nanoparticles with V-Shaped Arms

Eugene R. Zubarev、Jun Xu、Arshad Sayyad 等 4 位作者2006-03-25Journal of the American Chemical Society

Here we describe a very efficient method to produce well-defined amphiphilic gold nanoparticles (Au NPs) with an equal number of hydrophobic and hydrophilic arms which are distributed along the surface of a 2-nm gold core in an alternating fashion. The strategy involves direct coupling of V-shaped block copolymer amph…

Gold and Silver Nanoparticles Synthesis and ApplicationsDendrimers and Hyperbranched PolymersNanomaterials for catalytic reactions

Mn L3,2 X-ray absorption and magnetic circular dichroism inferromagnetic Ga1-xMnxP

Peter Stone、Michael A. Scarpulla、Rouin Farshchi 等 11 位作者2006-03-25University of North Texas Digital Library (University of North Texas)

We have measured the X-ray absorption and X-ray magnetic circular dichroism (XMCD) at the Mn L{sub 3,2} edges in ferromagnetic Ga{sub 1-x}Mn{sub x}P for 0.018 {le} x {le} 0.042. Large XMCD asymmetries at the L{sub 3} edge indicate significant spin-polarization of the density of states at the Fermi energy. The temperat…

Magnetic properties of thin filmsZnO doping and propertiesHeusler alloys: electronic and magnetic properties

Formation of Polyphenylene Films on Metal Electrodes by Electrochemical Reduction of Benzenediazonium Salts

Alain Adenier、Catherine Combellas、Frédéric Kanoufi 等 5 位作者2006-03-25Chemistry of Materials

It is possible to form micrometer thick polyphenylene (PP) films by electrochemical reduction of benzenediazonium tetrafluoroborate on metals in acetonitrile. The electrochemical behavior of the PP film is characterized by different electrochemical transient methods and is surprisingly different from that observed wit…

Electrocatalysts for Energy ConversionConducting polymers and applicationsMolecular Junctions and Nanostructures

Low Temperature Catalytic Pyrolysis for the Synthesis of High Surface Area, Nanostructured Graphitic Carbon

An‐Hui Lu、Wen‐Cui Li、Elena-Lorena Salabas 等 5 位作者2006-03-25Chemistry of Materials

High surface area graphitic carbons are of great interest in emerging applications including catalysis and energy storage because of the well-developed crystalline structure, high electronic conductivity and thermal stability, and satisfactory oxidation resistance at low temperature. We have developed the synthesis of…

Advancements in Battery MaterialsGraphene research and applicationsSupercapacitor Materials and Fabrication

Blending Chitosan with Polycaprolactone: Effects on Physicochemical and Antibacterial Properties

Aparna R. Sarasam、Raj Krishnaswamy、Sundararajan V. Madihally2006-03-25Biomacromolecules

Chitosan is a well sought-after polysaccharide in biomedical applications and has been blended with various macromolecules to mitigate undesirable properties. However, the effects of blending on the unique antibacterial activity of chitosan as well as changes in fatigue and degradation properties are not well understo…

Nanocomposite Films for Food PackagingPolymer Surface Interaction StudiesAntimicrobial agents and applications

Honeycomb-Structured Porous Films from Polypyrrole-Containing Block Copolymers Prepared via RAFT Polymerization as a Scaffold for Cell Growth

Danelle Beattie、Kok Hou Wong、CHARLES MALLORY WILLIAMS 等 7 位作者2006-03-25Biomacromolecules

Honeycomb-structured porous films were prepared using customized amphiphilic block copolymers, synthesized by RAFT polymerization. Pyrrole was templated along an amphiphilic block copolymer, composed of polystyrene and poly(acrylic acid). Subsequent oxidation of pyrrol to polypyrrole, resulted in the formation of a so…

Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyCovalent Organic Framework Applications

Pore Architecture of Diatom Frustules: Potential Nanostructured Membranes for Molecular and Particle Separations

Dušan Lošić、Gary Rosengarten、James G. Mitchell 等 4 位作者2006-03-25Journal of Nanoscience and Nanotechnology

Diatoms produce diverse three-dimensional regular silica structures with nanometer to micrometer dimensions and hold considerable promise for biological and biomimetic fabrication of nanostructured materials and devices. In the present work, we describe the ultrastructural characterization of porous structures in diat…

Analytical Chemistry and SensorsDiatoms and Algae ResearchWater Quality Monitoring and Analysis

Biodegradable Polylactide/Chitosan Blend Membranes

Ying Wan、Hua Wu、Aixi Yu 等 4 位作者2006-03-25Biomacromolecules

Biodegradable blend membranes based on polylactide and chitosan with various compositions were prepared via a two-step processing pathway. In the first step, solutions of each component were properly mixed and cast into a gelatinous membrane, and in the second step, the obtained membrane was immersed into a mixed solu…

Nanocomposite Films for Food Packagingbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution

84% Catalyst Activity of Water-Assisted Growth of Single Walled Carbon Nanotube Forest Characterization by a Statistical and Macroscopic Approach

Don N. Futaba、Kenji Hata、Tatsunori Namai 等 8 位作者2006-03-25The Journal of Physical Chemistry B

We propose a statistical and macroscopic analysis to estimate the catalyst activity of water-assisted growth (super-growth) of single-walled nanotubes (SWNT) and to characterize SWNT forests. The catalyst activity was estimated to be 84% (+/-6%), the highest ever reported. The SWNT forest was found to be a very sparse…

Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications

Organic and polymer transistors for electronics

Ananth Dodabalapur2006-03-25OpenAlex

Some of the major application areas for organic and polymeric transistors are reviewed. Organic complementary devices are promising on account of their lower power dissipation and ease of circuit design. The first organic large-scale integrated circuits have been implemented with this circuit approach. Organic transis…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsAnalytical Chemistry and Sensors

PNIPAM Chain Collapse Depends on the Molecular Weight and Grafting Density

Kyle N. Plunkett、Zhu Xi、Jeffrey S. Moore 等 4 位作者2006-03-25OpenAlex

This study demonstrates that the thermally induced collapse of end-grafted poly(N-isopropylacrylamide) (PNIPAM) above the lower critical solution temperature (LCST) of 32 degrees C depends on the chain grafting density and molecular weight. The polymer was grafted from the surface of a self-assembled monolayer contain…

Nanoparticle-Based Drug DeliveryPolymer Surface Interaction StudiesGraphene and Nanomaterials Applications

Microscopic model for high-spin versus low-spin ground state in[Ni2M(CN)8](M=MoV,WV,NbIV)magnetic clusters

Rajamani Raghunathan、Jean‐Pascal Sutter、Laurent Ducasse 等 5 位作者2006-03-24Physical Review B

Conventional superexchange rules predict ferromagnetic exchange interaction between $\mathrm{Ni}(\mathrm{II})$ and $M(M={\mathrm{Mo}}^{\mathrm{V}},\phantom{\rule{0.3em}{0ex}}{\mathrm{W}}^{\mathrm{V}},\phantom{\rule{0.3em}{0ex}}{\mathrm{Nb}}^{\mathrm{IV}})$. Recent experiments show that in some systems this superexchan…

Magnetism in coordination complexesOrganic and Molecular Conductors ResearchInorganic Chemistry and Materials

Acid-Catalyzed Cyclization of Anthracenol Derivatives to Homotriptycenes

Chunmei Gao、Derong Cao、Sheyang Xu 等 4 位作者2006-03-24The Journal of Organic Chemistry

10-Benzyl-9,10-dihydroanthracen-9-ols, having high electron densities in the benzene ring, exhibit in the presence of acid a transannular ring closure to the corresponding homotriptycenes in almost quantitative yields. Since the starting compounds are easily accessible from 9(10H)-anthracenone, this process represents…

Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistrySynthetic Organic Chemistry Methods

Broadband Dielectric and Resistivity Spectroscopy of WO3·H2O in the Range of 103−1010 Hz: Particle Size Effect

L. Beluze、Jean‐Claude Badot、Raphaël Weil 等 4 位作者2006-03-24The Journal of Physical Chemistry B

The interest in studying the electrical properties of WO(3) x H(2)O powders is made absolutely necessary because their infrared modulation properties depend on their morphologies and electronic populations. Broadband dielectric and resistivity spectra of WO(3) x H(2)O powders were recorded in a frequency range of 10(3…

Gas Sensing Nanomaterials and SensorsGlass properties and applicationsTransition Metal Oxide Nanomaterials

A Monte Carlo study of the mesophases formed by polar bent-shaped molecules

Silvia Orlandi、Roberto Berardi、Joachim Steltzer 等 4 位作者2006-03-24The Journal of Chemical Physics

Liquid crystal phases formed by bent-shaped (or "banana") molecules are currently of great interest. Here we investigate by Monte Carlo computer simulations the phases formed by rigid banana molecules modeled combining three Gay-Berne sites and containing either one central or two lateral and transversal dipoles. We s…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPlant Reproductive Biology