V. Calderón、Gert Schwarz、Félix C. García 等 7 位作者2006-09-20Journal of Polymer Science Part A Polymer Chemistry
Abstract We report the synthesis and characterization of 10 novel polyamides containing the benzo‐18‐crown‐6 subunit and its dipodal counterpart, along with their properties, and a comparison with homologous polyamides bearing benzo‐12‐crown‐4, benzo‐15‐crown‐5, and the corresponding dipodal systems. The anomalous pol…
Supramolecular Chemistry and ComplexesSynthetic Organic Chemistry MethodsSynthesis and properties of polymers
Sudhakar Balijepalli、Jerold M. Schultz2006-09-20Macromolecules
It is shown that crystalline/crystalline and crystalline/noncrystalline blends can crystallize from the melt such that both components reside in the same spherulite. The observed morphology of such systems is that of growth arms of one component separated by regions rich in the other component. For crystalline/crystal…
Polymer crystallization and propertiesMaterial Dynamics and PropertiesRheology and Fluid Dynamics Studies
Giovanni Barcaro、Alessandro Fortunelli2006-09-20The Journal of Physical Chemistry B
The interaction of small gold clusters (Au(n), n = 1-4, 20) and a gold monolayer with the MgO (100) surface surrounding a neutral oxygen vacancy (F(s) center) is investigated using density-functional (DF) calculations. It is found that the presence of the defect modifies the interaction of gold not only with the vacan…
Advanced Chemical Physics StudiesCatalytic Processes in Materials Sciencenanoparticles nucleation surface interactions
Xiangdong Ding、Tetsuro Suzuki、Xiaobing Ren 等 5 位作者2006-09-20Physical Review B
Precursor phenomena are critical issues for martensitic transformation, as they provide important clues for understanding the origin of the transformation and the structure of the transformation products. Prior to temperature-induced martensitic transformation, it has been recognized for a long time that the basal pla…
High-pressure geophysics and materialsMetallic Glasses and Amorphous AlloysShape Memory Alloy Transformations
Ding Wang、Zhiju Zheng、Chun‐Yan Hong 等 5 位作者2006-09-20Journal of Polymer Science Part A Polymer Chemistry
Abstract Novel hyperbranched poly(amido amine)s containing tertiary amines on the backbones and acryl or secondary amines as the surface groups were successfully synthesized via the Michael addition polymerizations of a triacrylamide [1,3,5‐triacryloylhexahydro‐1,3,5‐triazine (TT)] and a difunctional amine [ n ‐butyla…
RNA Interference and Gene DeliveryChemical Synthesis and AnalysisDendrimers and Hyperbranched Polymers
Haiyun Liu、Jian Xu、Yanfang Li 等 6 位作者2006-09-20Macromolecular Rapid Communications
Abstract Summary: A simple method for the fabrication of a chemical composition gradient from organic to inorganic by the pyrolysis of a polymethylsilsesquioxane (PMSQ) thin film in a gradient temperature field is reported. The resultant chemical gradient surface demonstrates gradual changes in wettability, and slight…
Surface Modification and SuperhydrophobicityPolymer Surface Interaction StudiesSilicone and Siloxane Chemistry
Timothy J. Boyle、L.J. Tribby、S.D. Bunge2006-09-20European Journal of Inorganic Chemistry
Abstract A series of cerium alkoxides were synthesized from the reaction of Ce{N[Si(CH 3 ) 3 ] 2 } 3 and the appropriate alcohol: neopentyl alcohol [H–OCH 2 C(CH 3 ) 3 = H‐ONep], tert ‐butyl alcohol [H–OC(CH 3 ) 3 = H‐O t Bu], o ‐( tert ‐butyl)phenol {H–OC 6 H 4 [C(CH 3 ) 3 ]‐2 = H‐ o BP}, 2,6‐dimethylphenol [H–OC 6 H…
Catalytic Processes in Materials ScienceLanthanide and Transition Metal ComplexesPolyoxometalates: Synthesis and Applications
Sebastian Günther、Ling Zhou、Michael Hävecker 等 7 位作者2006-09-20The Journal of Chemical Physics
The adsorbate species present during partial oxidation of methanol on a Cu(110) surface have been investigated in the 10(-5) mbar range with in situ x-ray photoelectron spectroscopy and rate measurements. Two reaction intermediates were identified, methoxy with a C 1s binding energy (BE) of 285.4 eV and formate with a…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
R.P. Bontchev、May Nyman2006-09-20Angewandte Chemie
Eine neue Geometrie für Polyoxoniobate findet sich in {Nb24O72H9}15−, dem größten bislang bekannten Isopolyoxoniobat-Clusteranion. Die Entwicklung seiner Struktur von isolierten Lindqvist-Anionen [Nb6O19]8− und der cyclischen Pyrochloreinheit [Nb6O30] hin zum komplexen Dimer [({Nb24O72H9}{Cu(en)2(H2O)}2{Cu(en)2})2]18−…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions
Feng Wang、Sung‐Kwan Mo、J. W. Allen 等 10 位作者2006-09-20Physical Review B
Angle-resolved photoemission spectroscopy (ARPES) has been performed on quasi-one-dimensional ${\mathrm{Li}}_{0.9}{\mathrm{Mo}}_{6}{\mathrm{O}}_{17}$ using photon energy $h\ensuremath{\nu}=500\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$. Measured band dispersions are in agreement with those from both low-photon-energy meas…
Physics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Guohua Hui、Lili Wu、Min Pan 等 6 位作者2006-09-20Measurement Science and Technology
In this paper, we propose a novel gas-ionization sensor based on aligned multi-walled carbon nanotubes (MWNT) at normal temperature and pressure. It consists of an Al plate electrode, a plastic thin film and a MWNT electrode. Breakdown voltages and discharge currents are recorded through a peripheral detecting circuit…
Carbon Nanotubes in CompositesGas Sensing Nanomaterials and SensorsMechanical and Optical Resonators
Markus Niederberger、Helmut Coelfen2006-09-20ChemInform
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Crystallography and molecular interactionsCrystallization and Solubility StudiesX-ray Diffraction in Crystallography
Sang-Eun Park2006-09-20Bulletin of the Korean Chemical Society
An electrostatic interaction is responsible for the attachment of gold seeds of 1-3 nm onto APTMS (3-aminopropyl trimethoxysilane)-coated silica cores in the formation of gold clusters. A surface plasmon resonance and morphology of gold clusters were significantly affected by the pH of gold colloids prepared by THPC r…
Gold and Silver Nanoparticles Synthesis and ApplicationsPolymer Surface Interaction StudiesNanocluster Synthesis and Applications
Yeon Sil Park、Dohyung Kim、Hoosung Lee 等 4 位作者2006-09-20Organic Letters
[structure: see text] A new liquid crystalline material having an ethylenedioxythiophene-pyridazine-ethylenedioxythiophene (EDOT-PDZ-EDOT) core with two peripheral long alkyl chains was prepared. The designated donor-acceptor-donor (D-A-D)-type core structure induced a distinct smectic liquid crystalline phase due to…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsPhotochromic and Fluorescence Chemistry
Li Yang、Paul May、Lei Yin 等 5 位作者2006-09-20Chemistry of Materials
The novel technique of liquid-phase pulsed laser ablation has been used to obtain unique, highly ordered nanostructures of crystalline carbon nitride (C 3 N 4 ) via ablation of a graphite target submerged in aqueous ammonia solution. Transmission electron microscopy (TEM) analysis shows that the morphology of the carb…
Diamond and Carbon-based Materials ResearchLaser-induced spectroscopy and plasmaLaser-Ablation Synthesis of Nanoparticles
Chunxu Liu、Junye Liu、Kai Dou2006-09-20The Journal of Physical Chemistry B
Three nonequivalent centers of Cs (A, B, and C) in monoclinic phase and C2 and S6 centers in cubic phase were identified in the Gd2O3:Eu3+ nanocrystals with spectral techniques. Size dependence in the spectra indicated that the excitations from both host and charge-transfer band (CTB) for the 5D0 --> 7F2 transition of…
Luminescence Properties of Advanced MaterialsQuantum Dots Synthesis And PropertiesLanthanide and Transition Metal Complexes
Jason Gruber、Ning Ma、Y Wang 等 5 位作者2006-09-20Modelling and Simulation in Materials Science and Engineering
The concepts of sparse data structures and related algorithms for phase field simulations are discussed. Simulations of polycrystalline grain growth with a conventional phase field method and with sparse data structures are compared. It is shown that memory usage and simulation time scale with the number of nodes but…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMagnetic Properties and Applications
Emmanuel Bourgeois、E. Bustarret、P. Achatz 等 5 位作者2006-09-20Physical Review B
On the basis of first-principles calculations and experimental secondary ion mass spectroscopy, electrical transport, and Raman measurements performed on homoepitaxial diamond, we find that at high concentrations boron atoms tend to segregate in dimers. The study of the electronic, vibrational, and electron-phonon cou…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
Yifeng Zhou、Miao Xu、Tao Yi 等 7 位作者2006-09-20Langmuir
Photoresponsive C3-symmetrical trisurea self-assembling building blocks containing three azobenzene groups (LC10 and LC4) at the rim were designed and synthesized. By introducing a trisamide gelator (G18), which can self-aggregate through hydrogen bonds of acylamino moieties to form a fibrous network, the mixture of L…
Supramolecular Self-Assembly in MaterialsPhotochromic and Fluorescence ChemistryPolydiacetylene-based materials and applications
Bryce S. Richards、Keith R. McIntosh2006-09-20Progress in Photovoltaics Research and Applications
Abstract The short‐wavelength response of cadmium sulfide/cadmium telluride (CdS/CdTe) photovoltaic (PV) modules can be improved by the application of a luminescent down‐shifting (LDS) layer to the PV module. The LDS layer contains a mixture of fluorescent organic dyes that are able to absorb short‐wavelength light of…
TiO2 Photocatalysis and Solar CellsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films