Anjanapura V. Raghu、Guru S. Gadaginamath、Sheetal S. Jawalkar 等 5 位作者2006-09-13Journal of Polymer Science Part A Polymer Chemistry
Abstract Novel polyurethanes (PUs) based on 2,2′‐[ethane‐1,2‐diylbis(nitrilomethylylidene)]diphenol and 2,2′‐[hexane‐1,6‐diylbis(nitrilomethylylidene)]diphenol as hard segments containing four aromatic diisocyanates (4,4′‐diphenylmethane diisocyanate, toluene 2,4‐diisocyanate, isophorone diisocyanate, and hexamethylen…
Polymer composites and self-healingEpoxy Resin Curing ProcessesSynthesis and properties of polymers
Jonathan L. Sessler、Dong‐Gyu Cho、Marcin Stępień 等 7 位作者2006-09-13Journal of the American Chemical Society
The synthesis of an inverted, methoxylated sapphyrin derivative is described. This system, wherein inversion of pyrrolic nitrogen atoms is configurationally enforced via the use of a 3,3'-bipyrrolic precursor, displays what is best described as "weak aromaticity" as judged from its spectroscopic features and supportin…
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsSynthesis and Properties of Aromatic Compounds
Dong‐Lin Zhao、Hailong Zhang、Xian-Wei Zeng 等 5 位作者2006-09-13Biomedical Materials
The magnetite (Fe(3)O(4)) nanoparticles were prepared by coprecipitation of Fe(3+) and Fe(2+) with an aqueous NaOH solution. The Fe(3)O(4)/polyaniline (PANI) magnetic composite nanoparticles with a core-shell structure with a diameter of 30-50 nm were prepared via an in situ polymerization of aniline in an aqueous sol…
Nanoparticle-Based Drug DeliveryCarbon Nanotubes in CompositesUltrasound and Hyperthermia Applications
Seung Jae Moon、M. W. Kim、K. W. Kim 等 14 位作者2006-09-13Physical Review B
We investigated the electronic structures of the two-dimensional layered perovskite ${\mathrm{Sr}}_{2}M{\mathrm{O}}_{4}$ ($M=4d$ Ru, $4d$ Rh, and $5d$ Ir) using optical spectroscopy and polarization-dependent O $1s$ x-ray absorption spectroscopy. While the ground states of the series of compounds are rather different,…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Xiqu Wang、Lumei Liu、Allan J. Jacobson2006-09-13Angewandte Chemie International Edition
A very good host: The guest acid molecules of hydrothermally synthesized [V(O)(bdc)](H2bdc)0.71 (bdc=benzenedicarboxylate) are removed to give high-quality single crystals of [V(O)(bdc)] (1). On absorption of guest molecules from the liquid phase, 1 undergoes crystal-to-crystal transformations (aniline: 2; thiophene:…
Porphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation Reactions
Andreas Gouloumis、David González‐Rodríguez、Purificación Vázquez 等 9 位作者2006-09-13Journal of the American Chemical Society
We have prepared three isomeric donor-acceptor systems, in which two phthalocyanine (Pc) units have been attached to the 1-,5- (1a), 1-,8- (1b), or 2-,6- (1c) positions of a central anthraquinone (AQ) moiety, leading to packed (1b) or extended (1a and 1c) topologies. The electronic interactions between the donor and t…
Organic Electronics and PhotovoltaicsPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Claus Feldmann、Marcus Roming、Klaus Trampert2006-09-13Small
Glow in the dark: Nanocrystalline CaF2 and CaF2:Ce,Tb particles are produced via a polyol-mediated synthesis. The nanomaterials are 20 nm in size, monodispersed, nonagglomerated, and redispersible. Excitation and emission spectra of CaF2:Ce,Tb illustrate the luminescence of powder samples, and a suspension in diethyle…
ZnO doping and propertiesLuminescence Properties of Advanced MaterialsInorganic Fluorides and Related Compounds
H. A. Fertig、L. Brey2006-09-13Physical Review Letters
We demonstrate that an undoped two-dimensional carbon plane (graphene) whose bulk is in the integer quantum Hall regime supports a nonchiral Luttinger liquid at an armchair edge. This behavior arises due to the unusual dispersion of the noninteracting edge states, causing a crossing of bands with different valley and…
Carbon Nanotubes in CompositesGraphene research and applicationsDiamond and Carbon-based Materials Research
Michael John、Guido Pintacuda、Ah Young Park 等 5 位作者2006-09-13Journal of the American Chemical Society
Rational drug design depends on the knowledge of the three-dimensional (3D) structure of complexes between proteins and lead compounds of low molecular weight. A novel nuclear magnetic resonance (NMR) spectroscopy strategy based on the paramagnetic effects from lanthanide ions allows the rapid determination of the 3D…
Protein Structure and DynamicsEnzyme Structure and FunctionAdvanced NMR Techniques and Applications
Jonathan E. Halpert、Venda J. Porter、John P. Zimmer 等 4 位作者2006-09-13Journal of the American Chemical Society
Synthesis of monodisperse samples of CdSe nanorods with CdTe tips is achieved using the mechanism of rod nucleated growth to form CdSe/CdTe nanobarbells. This synthesis produces a nanocrystal displaying "type-II" behavior with a morphology that is particularly well suited for internal exciton separation and carrier tr…
Perovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Hossein Hojjati、Sohrab Rohani2006-09-13Organic Process Research & Development
An attempt has been made to measure the concentration of paracetamol (98%, Aldrich Chemical Co. Inc., MO) in different solutions using an in situ ATR-FTIR device and chemometrics. A partial least-squares (PLS1) algorithm has been applied to construct two calibration models for paracetamol concentration, water mass per…
Analytical Chemistry and ChromatographyCrystallization and Solubility StudiesChemical and Physical Properties in Aqueous Solutions
Walter M. Weber、Georg S. Duesberg、Andrew P. Graham 等 10 位作者2006-09-13arXiv
Nominally undoped silicon nanowires (NW) were grown by catalytic chemical vapor deposition. The growth process was optimized to control the NWs diameters by using different Au catalyst thicknesses on amorphous SiO2, Si3N4, or crystalline-Si substrates. For SiO2 substrates an Ar plasma treatment was used to homogenize…
Materials Science
T. Kimura、Y. Otani、T. Sato 等 5 位作者2006-09-13arXiv
Reversible spin Hall effect comprising the "direct" and "inverse" spin Hall effects was successfully detected at room temperature. This experimental demonstration proves the fundamental relations called Onsager reciprocal relations between spin and charge currents. A platinum wire with a strong spin-orbit interaction…
Materials Science
T. T. Fister、G. T. Seidler、C. Hamner 等 6 位作者2006-09-13arXiv
We report new measurements and calculations of the non-resonant inelastic x-ray scattering (NRIXS) from Mg and Al for a wide range of momentum transfers, q. Extended oscillations in the dynamic structure factor S(q,w) due to scattering from the 2p and 2s orbitals (i.e. L-edges) are observed out to more than 150 eV pas…
Materials Science
Timo Laaksonen、Päivi Ahonen、Christoffer Johans 等 4 位作者2006-09-13ChemPhysChem
The solubility of charged nanoparticles is critically dependent on pH. However, the concentration range available with bases such as NaOH is quite narrow, since the particles precipitate due to compression of the electric double layer when the ionic strength is increased. The stability of mercaptoundecanoic acid-cappe…
Gold and Silver Nanoparticles Synthesis and ApplicationsElectrochemical Analysis and ApplicationsNanomaterials for catalytic reactions
Jin Zhao、Bin Li、Ken Onda 等 5 位作者2006-09-13Chemical Reviews
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvated Electrons on Metal Oxide SurfacesJin Zhao, Bin Li, Ken Onda, Min Feng, and Hrvoje PetekView Author Information Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 Cite this: Chem. Rev. 2006, 106, 10, 4402–4427Publication Dat…
Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsElectronic and Structural Properties of Oxides
Sara E. Skrabalak、Kenneth S. Suslick2006-09-13Journal of the American Chemical Society
New, thermally robust meso- and macroporous carbon powders were prepared by ultrasonic spray pyrolysis (USP) of aqueous solutions using an inexpensive high-frequency ultrasound generator from a household humidifier. We choose our molecular precursors rationally, so that the expected decomposition pathways produce only…
Supercapacitor Materials and FabricationZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
G. Harikrishnan、T. Umasankar Patro、D. V. Khakhar2006-09-13Industrial & Engineering Chemistry Research
Flexible and rigid polyurethane (PU) foam nanocomposites were synthesized using unmodified and organically modified montmorillonite clays. X-ray diffraction and transmission electron microscopy studies showed that, while the unmodified clays were intercalated, the modified clays were exfoliated in the foams produced.…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingFlame retardant materials and properties
Christine Hiemstra、Zhiyuan Zhong、Liangbin Li 等 5 位作者2006-09-13Biomacromolecules
Eight-arm poly(ethylene glycol)-poly(L-lactide), PEG-(PLLA)(8), and poly(ethylene glycol)-poly(D-lactide), PEG-(PDLA)(8), star block copolymers were synthesized by ring-opening polymerization of either L-lactide or D-lactide at room temperature in the presence of a single-site ethylzinc complex and 8-arm PEG (M(n) = 2…
Hydrogels: synthesis, properties, applicationsAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties
Dennis P. Clougherty2006-09-13arXiv
Using a semiclassical continuum model of an electron in a deformable molecular crystal, some properties of multicomponent generalizations of the polaron--``vector polarons''-- are elucidated. Analytical solutions for the case of two electronic bands coupled to two vibrational modes are given in detail. Within the mode…
Materials Science