J.H. Thurston、Kenton H. Whitmire2003-02-08Inorganic Chemistry
Reactions between triphenyl bismuth, salicylic acid, and niobium or tantalum ethoxide have been explored. Four new coordination complexes incorporating bismuth and the group 5 metals niobium or tantalum have been synthesized and characterized spectroscopically, by elemental analysis, and by single crystal X-ray diffra…
Ferroelectric and Piezoelectric MaterialsSynthesis and characterization of novel inorganic/organometallic compoundsSilicone and Siloxane Chemistry
M. Francesca Ottaviani、Nicholas J. Turro、Steffen Jockusch 等 4 位作者2003-02-08The Journal of Physical Chemistry B
Guest−host interactions of poly(amidoamine) dendrimers and porous surfaces, such as homoporous silica of different pore sizes, activated alumina (acidic, neutral, basic), and MCM-41 zeolite (Si/Al=30), were investigated by electron paramagnetic resonance (EPR) spectroscopy. Two generations of dendrimers were selected,…
Advanced Polymer Synthesis and CharacterizationDendrimers and Hyperbranched PolymersFerrocene Chemistry and Applications
D. J. Chaiko2003-02-08Chemistry of Materials
This paper reports a new mechanism for the formation of clay intercalates containing poly(ethylene oxide) (PEO). This mechanism permits formation of a two-dimensional PEO crystal phase. Under acidic conditions, polymer adsorption occurs through an ion-exchange process that is mediated by oxonium cation formation. A si…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and Irradiation
Bumsu Kim、Hyun Park、Wolfgang M. Sigmund2003-02-08Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTElectrostatic Interactions between Shortened Multiwall Carbon Nanotubes and PolyelectrolytesBumsu Kim, Hyun Park, and Wolfgang M. SigmundView Author Information Department of Materials Science & Engineering, University of Florida, 225 Rhines Hall, P.O. Box 116400, Gainesville,…
Carbon Nanotubes in CompositesPolymer Nanocomposite Synthesis and IrradiationNanotechnology research and applications
Igor V. Rubtsov、Kimihiro Susumu、Grigorii I. Rubtsov 等 4 位作者2003-02-08Journal of the American Chemical Society
The excited-state dynamics of two conjugated bis[(porphinato)zinc(II)] (bis[PZn]) species, bis[(5,5'-10,20-bis[3,5-bis(3,3-dimethyl-1-butyloxy)phenyl]porphinato)zinc(II)]ethyne (DD) and [(5,-10,20-bis[3,5-bis(3,3-dimethyl-1-butyloxy)phenyl]porphinato)zinc(II)]-[(5',-15'-ethynyl-10',20'-bis(heptafluoropropyl)porphinato…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials
Dean M. DeLongchamp、Paula T. Hammond2003-02-08Chemistry of Materials
The layer-by-layer (LBL) deposition technique has been applied to the design of polymer electrolyte films appropriate for electrochemical applications such as sensors and electrochromic cells. In this work, we describe the properties of three LBL polymer electrolyte systems assembled from cationic layers of linear pol…
Conducting polymers and applicationsPolymer Surface Interaction StudiesAnalytical Chemistry and Sensors
Sergei Lebedkin、Frank Hennrich、Tatyana Skipa 等 4 位作者2003-02-08The Journal of Physical Chemistry B
Single-walled carbon nanotubes (SWNTs) prepared by pulsed laser vaporization, dispersed, and surfactant-stabilized in near-infrared transparent D 2 O show weak photoluminescence (PL) from ∼1300 up to >1750 nm corresponding to the lowest electronic interband transitions of semiconducting tubes. The characteristic featu…
Carbon Nanotubes in CompositesFullerene Chemistry and ApplicationsMechanical and Optical Resonators
F. Javier López‐Garzón、M. Domingo-Garcı́a、Manuel Pérez‐Mendoza 等 5 位作者2003-02-08Langmuir
This paper deals with the modifications of the chemical surface functionalities and the textural changes of a glassy carbon produced by three oxidizing agents: ozone, hydrogen peroxide, and oxygen plasma. The chemical surface changes are evaluated by using Fourier transform infrared spectroscopy, temperature-programme…
Adsorption and biosorption for pollutant removalCatalytic Processes in Materials ScienceCarbon and Quantum Dots Applications
Anastassia N. Alexandrova、Alexander I. Boldyrev、Hua‐Jin Zhai 等 6 位作者2003-02-08The Journal of Physical Chemistry A
The electronic structure and chemical bonding of B 6 - and B 6 were investigated using anion photoelectron spectroscopy and ab initio calculation. Vibrationally resolved photoelectron spectra were obtained for B 6 - and were compared to calculations performed at various levels of theory. Extensive searches were carrie…
Boron and Carbon Nanomaterials ResearchBoron Compounds in ChemistryInorganic Chemistry and Materials
Jae Wook Lee、Jong Won Lee、Wang Geun Shim 等 5 位作者2003-02-07Journal of Chemical & Engineering Data
Adsorption equilibria of seven chlorinated volatile organic compounds on mesoporous silicate MCM-48 were obtained using a gravimetric technique. For comparison purposes, three organic sorbents (activated carbon, activated carbon fiber and nonionic polymer resin, SP850) and three inorganic sorbernts (DAY zeolite, mesop…
Adsorption and biosorption for pollutant removalZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Alexey Eremin、Siegmar Diele、G. Pelzl 等 4 位作者2003-02-07Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A tilted smectic phase of a new achiral banana-shaped mesogen is presented. It possesses liquidlike order within the layers and appears with a fan-shaped texture. At sufficiently high electric fields, this texture can be transformed into a texture that displays a complete extinction between crossed polarizers and it f…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPlant Reproductive Biology
Tillman U. Gerngross、Steven Slater、Richard A. Gross2003-02-07Science
Although the Viewpoint by R. A. Gross and B. Kalra “(Biodegradable polymers for the environment,” Special Issue on Green Chemistry, 2 Aug., p [803][1]) makes a deliberate effort to present biopolymers and their prospects in the most favorable light, the authors have chosen to completely omit any
biodegradable polymer synthesis and properties
Gustavo A. Abraham、Alberto Gallardo、Julio San Román 等 6 位作者2003-02-07Journal of Biomedical Materials Research Part A
Graft copolymers of poly(epsilon-caprolactone) (PCL) on poly(dimethylacrylamide) (PDMAm), poly(methylmethacrylate) (PMMA), or on copolymers of poly(DMAm-co-MMA) have been synthesized and characterized by (1)H NMR spectroscopy, differential scanning calorimetry (DSC), and size exclusion chromatography (SEC). These part…
Hydrogels: synthesis, properties, applicationsbiodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical Applications
Rukmal Abeysekera、Richard J. Bushby、Céline Caillet 等 7 位作者2003-02-07Macromolecules
A triblock copolymer has been prepared in which a main chain polymeric discotic liquid crystal is capped at both ends with blocks of poly(ethylene oxide). It has been characterized by GPC, DSC, polarizing microscopy, small- and wide-angle X-ray diffraction, electron microscopy, and rheometry. The copolymer undergoes m…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsBlock Copolymer Self-Assembly
Randy J. Ellingson、Jeffrey L. Blackburn、Jovan M. Nedeljković 等 7 位作者2003-02-07Physical review. B, Condensed matter
We present results of theoretical studies of the electronic structure, and experimental studies of electronic relaxation dynamics, for colloidally synthesized InP quantum dots (QD's). Detailed theoretical calculations of the electronic structure of a 41.8 \AA{} diameter InP QD, based on an atomistic pseudopotiential a…
Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Keiji Kanki、Toshio Masuda2003-02-07Macromolecules
The synthesis of a star polymer with poly(phenylacetylene) arms was examined. 1,4-Diethynylbenzene, which has a similar structure to the monomer, was added as linking agent to the living polymerization system of phenylacetylene by [(nbd)RhCl] 2 /Ph 2 C C(Ph)Li/Ph 3 P ternary catalyst. A star polymer was selectively fo…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and Properties of Aromatic Compounds
Hajime Okamoto、Tsutomu Nakanishi、Yukiko Nagai 等 5 位作者2003-02-07Journal of the American Chemical Society
Possible molecular conformations in peptide nanorings and nanotubes were theoretically investigated by a mathematical conformation analysis as well as ab initio Hartree-Fock calculations. The mathematical analysis predicts not only the conventional nanorings having an extended-type (E-type) backbone (trans zigzag) but…
2D Materials and ApplicationsChemical Synthesis and AnalysisSupramolecular Self-Assembly in Materials
Κ. T. Jacob、Mrinalini Attaluri2003-02-07Journal of Materials Chemistry
The standard Gibbs energy of formation of LaMnO3 has been measured in the temperature range from 900 to 1400 K using a solid-state cell incorporating a buffer electrode. The oxygen potential corresponding to the three-phase mixture MnO + La2O3 + LaMnO3 has been measured using pure oxygen gas at 0.1 MPa as the referenc…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Zongxian Yang、Gang Liu、Ruqian Wu2003-02-07Physical review. B, Condensed matter
Using the first-principles density-functional approaches, impurity distributions and magnetic properties of Co-doped anatase ${\mathrm{TiO}}_{2}$ were investigated. From the total energies calculated for various possible configurations, Co atoms were found to prefer the non-uniform doping mode with short Co-Co distanc…
ZnO doping and propertiesMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
S.R. Bayly、Zhiquiang Xu、Brian O. Patrick 等 7 位作者2003-02-07Inorganic Chemistry
The synthesis and physical characterization of a series of lanthanide (Ln(III)) and nickel (Ni(II)) mixed trimetallic complexes with the heptadentate (N(4)O(3)) amine phenol ligand H(3)trn [tris(2'-hydroxybenzylaminoethyl)amine] has been accomplished in order to extend our understanding of how amine phenol ligands can…
Magnetism in coordination complexesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes