Flor de Marı́a Ramı́rez、Loı̈c J. Charbonnière、Gilles Muller 等 5 位作者2001-01-01Journal of the Chemical Society Dalton Transactions
The new narrow-rim functionalised receptor 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis[2-(diethylcarbamoylmethoxy)ethoxy]calix[4]arene (A4bL4) has been synthesised. NMR spectra show it to adopt a cone conformation in solution with a time-averaged C4v symmetry. A4bL4 reacts with trivalent lanthanide ions in aceton…
Magnetism in coordination complexesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
Huanyu Wei、Yu Lu、Wenfang Shi 等 5 位作者2001-01-01Journal of Applied Polymer Science
Methacrylated hyperbranched poly(amine ester)s as oligomers in radiation curing resins have a lower viscosity and a higher cure speed. Their viscosity was reduced sharply when an amount of a monomer was added or the temperature was increased. Their polymerization rate and final conversion of the double bond differ wit…
Epoxy Resin Curing ProcessesDendrimers and Hyperbranched PolymersSynthesis and properties of polymers
Evan T. Powers、Jeffery W. Kelly2001-01-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTMedium-Dependent Self-Assembly of an Amphiphilic Peptide: Direct Observation of Peptide Phase Domains at the Air−Water InterfaceEvan T. Powers and Jeffery W. KellyView Author Information Department of Chemistry and the Skaggs Institute of Chemical Biology, The Scripps…
Advanced biosensing and bioanalysis techniquesSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
Kenji Kobayashi、Hiroyuki Izawa、Naomichi Furukawa 等 5 位作者2001-01-01Chemical Communications
Two types of macrocyclic multi-telluranes with hypervalent Te–O apical linkages in the main chain were prepared by the reaction of a telluronium salt or a cationic ditelluroxane with phthalate via [3 + 3] and [2 + 2] assembly, respectively.
Metal-Organic Frameworks: Synthesis and ApplicationsPorphyrin and Phthalocyanine ChemistryOrganoselenium and organotellurium chemistry
Benoît Coasne、A. Grosman、N. Dupont-Pavlovsky 等 5 位作者2001-01-01Physical Chemistry Chemical Physics
Porous silicon is a network of parallel straight mesopores without lateral interconnection. The adsorption isotherm of nitrogen onto porous silicon exhibits a hysteresis loop of type H2 in the IUPAC classification, similar to those observed for highly interconnected mesoporous media. This shows that it is not possible…
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisSilicon Nanostructures and Photoluminescence
Hiroko Horie、Akira Takagi、Hiroshi Hasebe 等 5 位作者2001-01-01Journal of Materials Chemistry
Two series of bis[1,2-bis(4-n-alkylphenyl)ethane-1,2-dithiolene]nickel, Cn–Ni (n = 1–12), and bis[1,2-bis(4-n-alkoxyphenyl)ethane-1,2-dithiolene]nickel, CnO–Ni(n = 1–12, 14, 16, 18), have been synthesized. Their mesomorphism, thermochromism, supramolecular structures and π-acceptor property have been investigated by u…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence Chemistry
D. I. Khomskiǐ、K. I. Кugel2001-01-01University of Groningen research database (University of Groningen / Centre for Information Technology)
We argue that elastic interactions between ions in different valence states can play an essential role in the stabilization of stripes (or 2D "sheets" ) in doped oxides. These interactions are in general long range and an iso tro pic (attractive in certain directions and repulsive in others). This can naturally give r…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Yanghui Xiang、Wenbin Hu、Xinkuan Liu 等 5 位作者2001-01-01Transactions of the IMF
SUMMARYChanges of the surface state during the pretreatment of electroless nickel plating on magnesium alloys were studied using the weight loss method. scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that due to the formation of Mg(OH), and MgF,films on the surface. a…
Corrosion Behavior and InhibitionElectrodeposition and Electroless Coatings
Hideki Kobayashi、Masato Amaike、Jong Hwa Jung 等 6 位作者2001-01-01Chemical Communications
The combination of boronic acid-appended poly(L-lysine) 1 and sugar-based gelator 2 yields a novel organo-polymer gel, consisting of vesicles held together by polymer molecules.
Glycosylation and Glycoproteins ResearchSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
Edward G. Gillan、Richard B. Kaner2001-01-01Journal of Materials Chemistry
Rapid, exothermic metathesis (exchange) reactions between ZrCl4 and Na2O result in crystalline ZrO2 in seconds. Thermal analysis and in situ reaction temperature measurements show that the reaction initiates near the sublimation point of ZrCl4, rapidly reaches temperatures above 1350 °C, and generates a molten NaCl fl…
Advanced ceramic materials synthesisNuclear Materials and PropertiesInorganic Chemistry and Materials
Li–Chyong Chen、Padmakar Kichambare、Kuei‐Hsien Chen 等 6 位作者2001-01-01Journal of Applied Physics
A series of nanocrystalline diamond films with grain size ranged from 4 nm to a few hundreds of nanometers were grown by microwave plasma enhanced chemical vapor deposition. Effects of the substrate pretreatment and the methane fraction in the source gas on the microstructure, surface roughness, and optical transmitta…
Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchAdvanced materials and composites
Andreas Goessl、Michael D. Garrison、Jean-Benoı̂t Lhoest 等 4 位作者2001-01-01Journal of Biomaterials Science Polymer Edition
Plasma lithography, combining plasma deposition with photolithography, is described as a versatile method to manufacture all-polymeric substrates with thin-film patterns for applications in biomedical engineering. Patterns of a hydrophobic fluorocarbon plasma polymer with feature sizes between 5 and 100 microm were de…
Surface Modification and SuperhydrophobicityPolymer Surface Interaction StudiesNanofabrication and Lithography Techniques
L. A. Utracki、Robert Simha2001-01-01Journal of Polymer Science Part B Polymer Physics
Extrusion foaming of molten polystyrene (PS) with three physical foaming agents (PFAs), carbon dioxide (CO2), 1,1,1,2-tetrafluoroethane, and 1-chloro-1,1-difluoroethane, is considered. The concentration of injected PFA was W = 0–5 wt % for CO2 and W = 0–15 wt % for the other agents. The aim of this work is to connect…
Phase Equilibria and ThermodynamicsInjection Molding Process and PropertiesPolymer Foaming and Composites
Shu-Tuen Tang、Hoi Sing Kwok2001-01-01Journal of Applied Physics
A powerful method for liquid crystal (LC) cell twist angle and retardation measurement is presented. This method is based on the spectroscopic ellipsometry. By varying the polarizer and analyzer angles only, a transmission spectrum containing null transmission at some particular wavelengths can be obtained. Analytical…
Liquid Crystal Research AdvancementsOptical Polarization and Ellipsometry
Zhiyong Xia、Hung‐Jue Sue、Alex J. Hsieh2001-01-01Journal of Applied Polymer Science
The impact fracture behavior of molecularly orientated polycarbonate (PC) sheets was investigated. The molecular orientation was achieved via a newly developed equal channel angular extrusion (ECAE) process. Improvement in impact fracture propagation resistance was observed in the ECAE processed PC sheets. The improve…
Mechanical Behavior of CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Yan Xu、Dunru Zhu、Zijian Guo 等 6 位作者2001-01-01Journal of the Chemical Society Dalton Transactions
Two novel hexadecametal–oxygen cluster compounds, {Ni[(NH2)2(C2H4)2NH]2}3[PMoVI5MoV3VIV8O44]·[(NH2)2(C2H4)2NH]·H2O 1 and {Co[(NH2)2(C2H4)2NH]2}2Na[PMoVI6MoV2VIV8O44]·8H2O 2 are synthesized by a hydrothermal method, and characterized by X-ray crystallography, showing that the anion of 1 has a novel tetra-capping mode,…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Yueping Xiong、Katsuhiko Yamaji、Natsuko Sakai 等 6 位作者2001-01-01Journal of The Electrochemical Society
The temperature and the oxygen partial pressure dependencies of the electronic conductivity of step) solid solutions were measured by dc polarization using a Hebb-Wagner's ion-blocking cell. The main charge carrier was electron for ceria-containing compositions in a whole range of measured oxygen partial pressure to 3…
Advancements in Solid Oxide Fuel CellsCatalysis and Oxidation ReactionsElectronic and Structural Properties of Oxides
Fausto Pedro Garcı́a Márquez、A.E. Palomares、Fernando Rey 等 4 位作者2001-01-01Journal of Materials Chemistry
In situ X-ray photoelectron spectroscopy was used to characterise Cu/Mg/Al mixed oxides derived from hydrotalcites (catalyst used for the NOx removal reaction). The active sites are the copper centres: (i) Cu(0) for NO decomposition and (ii) Cu(0) and/or Cu(I) for NO reduction with a hydrocarbon. The ability of these…
Catalytic Processes in Materials ScienceLayered Double Hydroxides Synthesis and ApplicationsMagnesium Oxide Properties and Applications
Sung‐Min Yoon、Hiroshi Ishiwara2001-01-01IEEE Transactions on Electron Devices
A novel FET-type ferroelectric memory cell with one-transistor, and two-capacitor (1T2C) structure was fabricated and characterized, in which the generation of depolarization field in ferroelectric film during data retention was suppressed by polarizing two ferroelectric capacitors in opposite directions. It was demon…
Ferroelectric and Piezoelectric MaterialsElectronic and Structural Properties of OxidesFerroelectric and Negative Capacitance Devices
Roberto Neagu、Eugen R. Neagu、Ioannis M. Kalogeras 等 4 位作者2001-01-01Materials Research Innovations
The Thermally Stimulated Discharge Current (TSDC) technique is widely used for the study of main and secondary dielectric relaxations in polymers. The TSD current is described by different equations that can be arranged in a unique three-parameters (the activation energy W, A and B) general form. The physical meaning…
Polymer Nanocomposites and PropertiesHigh voltage insulation and dielectric phenomenaDielectric materials and actuators