Bin Du、E.A. Meyers、Sheldon G. Shore2000-09-14Inorganic Chemistry
The lanthanide−transition-metal complex (H 2 O) 6 (DMF) 6 Ho 2 [Ni(CN) 4 ] 3, 1, was prepared from the reaction of Ho(NO 3 ) 3 ·6.5H 2 O with K 2 [Ni(CN) 4 ] at a 2:3 molar ratio in DMF (DMF = N, N -dimethylformamide). This compound is a model compound for studying the effects of H 2 O ligands on the coordination geom…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials
Nobukatsu Nemoto、Fumio Sanda、Takeshi Endo2000-09-14Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTControlled Cationic Ring-Opening Polymerization of MonothiocarbonateNobukatsu Nemoto, Fumio Sanda, and Takeshi EndoView Author Information Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku,…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesSynthesis and properties of polymers
Stephen E. Rankin、Leo J. Kasehagen、Alon V. McCormick 等 4 位作者2000-09-14Macromolecules
Recent investigations have implicated cagelike precursors in the unusually high gelation conversion (∼82%) of acid-catalyzed tetraethoxysilane. However, the statistical models used so far cannot capture kinetic or composition-dependent features of alkoxysilane polycondensation. Here we take a first step toward unified…
Mesoporous Materials and CatalysisAerogels and thermal insulationSilicone and Siloxane Chemistry
Lee D. Hansen2000-09-14Industrial & Engineering Chemistry Research
A brief review of the application of calorimetry to measurement of the kinetics of slow processes is presented. Processes degrading or otherwise changing the properties of materials often occur too slowly to be readily measured by conventional chemical analyses but can be measured in a relatively short period of time…
Thermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structurethermodynamics and calorimetric analyses
Graham A. Bowmaker、H. Hartl、Victoria Urban2000-09-14Inorganic Chemistry
The new compounds [NBu 4 ][Cu(CN)X] (X = Br ( 1 ), I ( 2 )) and [NBu 4 ][Cu 3 (CN) 4 ]·CH 3 CN ( 3 ) have been prepared by reaction of [NBu 4 ]X with CuCN in acetone ( 1, 2 ) or acetonitrile ( 3 ), and have been characterized by X-ray crystallography and vibrational spectroscopy. Compounds 1 (C 34 H 72 Br 2 Cu 2 N 4,…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials
Michael Diener、Noah Nichelson、J. Michael Alford2000-09-14The Journal of Physical Chemistry B
The synthesis of single-walled carbon nanotubes (SWNTs) in sooting flames is reported. This method offers a viable path towards low-cost large-scale synthesis, which is lacking in arc- and laser-based SWNT synthetic techniques. As with other methods, the growth of the SWNTs in the flame is catalyzed by the presence of…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Young Moo Lee、Jaehoon Kim、Jong Seok Kang 等 4 位作者2000-09-14Macromolecules
The annealing effects of a dilute polyaniline solution on chemical and physical properties were investigated. Emeraldine base (EB) of polyaniline prepared by the conventional procedure was dissolved in 1-methyl-2-pyrrolidinone (NMP). After heating at 60−140 °C for 2 h, the color of PANi solution changed from deep blue…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors
R. Feyerherm、S Abens、D. Günther 等 8 位作者2000-09-14Journal of Physics Condensed Matter
Single-crystal magnetic susceptibility and specific heat studies of the one-dimensional copper complex [PM·Cu(NO 3 ) 2 ·(H 2 O) 2 ] n (PM = pyrimidine) show that it behaves like a uniform S = 1/2 antiferromagnetic Heisenberg chain, characterized by the exchange parameter J / k B = 36 K. Specific heat measurements in t…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
Kenji Okitsu、Akihiko Yue、Shuji Tanabe 等 4 位作者2000-09-14Chemistry of Materials
Palladium nanoparticles dispersed on Al 2 O 3 were prepared via the sonochemical reduction of tetrachloropalladate(II) (Pd(II)) in an aqueous solution. The reduction of Pd(II) to metallic Pd successfully proceeded, even in the presence of Al 2 O 3 powder, by ultrasonic irradiation at 200 kHz. The rates of Pd(II) reduc…
Innovative Microfluidic and Catalytic Techniques InnovationUltrasound and Cavitation PhenomenaNanomaterials for catalytic reactions
Paola Cacciafesta、Andrew D. L. Humphris、Klaus D. Jandt 等 4 位作者2000-09-14Langmuir
Conformational changes of proteins adsorbing on biomaterial surfaces affect biocompatibility. Titanium is among the most successful biomaterials; however, the mechanisms leading to its biocompatibility are not yet understood. The primary objective of this study was to investigate the conformation of human plasma fibri…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsBlood properties and coagulation
Boris A. Akimov、Vladislav A. Bogoyavlenskiy、Ludmila I. Ryabova 等 4 位作者2000-09-14arXiv
We report on low-temperature photoconductivity (PC) in n-PbTe(Ga) epitaxial films prepared by the hot-wall technique on <111>-BaF_2 substrates. Variation of the substrate temperature allowed us to change the resistivity of the films from 10^8 down to 10_{-2} Ohm x cm at 4.2 K. The resistivity reduction is associated w…
Materials Science
Keiji Tanaka、Atsushi Takahara、Tisato Kajiyama2000-09-14Macromolecules
Surface glass transition temperature,, of monodisperse polystyrene (PS) films was determined from the temperature dependence of lateral force at a given scanning rate. The end groups of the PS were composed of sec -butyl group and a repeating unit terminated by proton. of the PS films was discerned to be markedly lowe…
Material Dynamics and PropertiesSurfactants and Colloidal SystemsRheology and Fluid Dynamics Studies
Svetlana A. Sukhishvili、Steve Granick2000-09-14OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTLayered, Erasable, Ultrathin Polymer FilmsSvetlana A. Sukhishvili and Steve GranickView Author Information Department of Materials Science and Engineering University of Illinois at Urbana-Champaign 104 South Goodwin Ave., Urbana, Illinois 61801 Cite this: J. Am. Chem.…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsPolymer Surface Interaction Studies
Michael J. Murphy、D.W. Baum、D B Clark 等 5 位作者2000-09-13University of North Texas Digital Library (University of North Texas)
This paper addresses numerical simulation of damage and fracture in concrete from the impact and penetration of shaped charge jets. We have modeled the jet penetration process with CALE, a two dimensional arbitrary Lagrange Eulerian hydrocode. We have looked at several constitutive models ranging from simple pressure…
Advanced Surface Polishing TechniquesHigh-Velocity Impact and Material BehaviorIon-surface interactions and analysis
Hatsumi Mori、Naoki Sakurai、Shōji Tanaka 等 7 位作者2000-09-13Chemistry of Materials
Five θ-type BETS salts [BETS = bis(ethylenedithio)tetraselenafulvalene], θ-BETS 2 RbCo(SCN) 4, θ-BETS 2 RbZn(SCN) 4, θ-BETS 2 CsCo(SCN) 4, θ-BETS 2 CsZn(SCN) 4, and θ-BETS 2 Ag(CN) 2, have been newly prepared by the electrocrystallization method. The crystal structure analyses indicate that the former four salts are i…
Perovskite Materials and ApplicationsMagnetism in coordination complexesOrganic and Molecular Conductors Research
S. C. Ng、Jingmei Xu、Hardy Sze On Chan2000-09-13Macromolecules
Regioregular polymers poly(3-alkyl-2,5-thienylene- alt -1,4-phenylene) (PBTC n, n = 4, 8, 12) and poly[1,4-bis(3-alkyl-2-thienyl)phenylene] (PBTBC n, n = 4, 8, 12), which contain alternating phenylene and substituted thienylene or bithienylene repeating units, have been chemically and/or electrochemically synthesized…
Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications
Jingjing Huang、David F. Kelley2000-09-13Chemistry of Materials
The synthesis, characterization, absorption, and emission spectra of MoSe2 and WSe2 nanoclusters are reported. These nanoclusters are about 3.5−6 nm (MoSe2, see graphic) and 4−7 nm (WSe2) in diameter, as measured by TEM imaging. The particles are strongly quantum confined and highly anisotropic. Electron diffraction r…
2D Materials and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Yingxin Xiao、Richard A. Wong、David Y. Son2000-09-13Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of a New Hyperbranched Poly(silylenevinylene) with Ethynyl FunctionalizationYingxin Xiao, Richard A. Wong, and David Y. SonView Author Information Department of Chemistry, P.O. Box 750314, Southern Methodist University, Da…
RNA Interference and Gene DeliveryLuminescence and Fluorescent MaterialsDendrimers and Hyperbranched Polymers
James P. Collman、Allis Chien、Todd A. Eberspacher 等 5 位作者2000-09-13Inorganic Chemistry
Nitrogenous bases have commonly been employed as axial ligands for metalloporphyrins in biomimetic model compounds and catalytic oxygenation chemistry. The addition of bases such as pyridines or imidazoles to metalloporphyrin-catalyzed hydrocarbon oxidation reactions is known to affect catalyst selectivity and turnove…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsHemoglobin structure and function
Seung‐Yeop Kwak、Dae Up Ahn2000-09-13Macromolecules
Fluoro-terminated hyperbranched poly(ether ketone)s (FHBPEKs) with controlled degrees of branching and their linear analogous poly(ether ketone) (LPEK) whose chemical structure and molecular weights were similar to those of FHBPEKs were synthesized and characterized. Depending on the amount of the core molecules, degr…
Epoxy Resin Curing ProcessesDendrimers and Hyperbranched PolymersSynthesis and properties of polymers