Stéfania Tanase、Elisabeth Bouwman、Gary J. Long 等 7 位作者2004-10-14European Journal of Inorganic Chemistry
Abstract The synthesis and characterization of a mononuclear iron( III ) complex [Fe(Hphpz)Cl(CH 3 OH)] ( 1 ) and a tetranuclear assembly of a bis(μ‐hydroxo)‐bridged dinuclear iron( III ) complex [{Fe(Hphpz) 2 (OH)} 2 ][Fe(Hphpz) 3 ] 2 ( 2 ) with the ligand 3(5)‐methyl‐5(3)‐(2‐hydroxyphenyl)pyrazole (H 2 phpz) is repo…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Tommaso Carofiglio、Alessandro Varotto、Umberto Tonellato2004-10-14The Journal of Organic Chemistry
Stepwise amination of cyanuric chloride (1) with 5-(4-aminophenyl)-10,15,20-triphenylporphyrin (2) and/or its zinc(II) complex (3) enables the synthesis of porphyrin-porphyrin dyads with predetermined free base-free base forms or free base-zinc and zinc-zinc metalation states. Furthermore, the use of aminopropyl-silan…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryHemoglobin structure and function
Paula Gawryszewska、Oscar L. Malta、Ricardo L. Longo 等 9 位作者2004-10-14ChemPhysChem
A detailed photophysical study of [Eu within (biqO2.2.2)(CF3SO3)](CF3SO3)2. CH3CN.H2O (Eu within 1) and two other types of cryptates incorporating three 3,3'-biisoquinoline-2,2'-dioxide units has been performed. Structural crystallographic data of Eu within 1, electronic structure calculations and theoretical models w…
Magnetism in coordination complexesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
Kenji Wada、Naohiko Itayama、Naoki Watanabe 等 6 位作者2004-10-14Organometallics
A series of metallocene-containing silsesquioxanes with alkenylsilyl and trimethylsilyl groups, Cp‘ 2 M[(c-C 5 H 9 ) 7 Si 7 O 11 ](OSiMe 2 R) ( 2b − d, 3b − d, 4d, 5d: Cp‘ = Cp (cyclopentadienyl), Cp* (pentamethylcyclopentadienyl); M = Ti, Zr, Hf, R = methyl, vinyl, allyl), have been synthesized. The structures of the…
Organometallic Complex Synthesis and CatalysisSynthesis and characterization of novel inorganic/organometallic compoundsSilicone and Siloxane Chemistry
Madhuchhanda Bhattacharya、Michael P. Harold、Vemuri Balakotaiah2004-10-14AIChE Journal
Abstract The asymptotic mass‐transfer coefficients are determined in washcoated monoliths of various geometric shapes by solving the convection–diffusion equation in the fluid phase coupled with the diffusion–reaction equation in the washcoat. The dependency of the asymptotic Sherwood number (Sh ∞ ) on washcoat proper…
Catalytic Processes in Materials ScienceCatalysts for Methane ReformingHeat and Mass Transfer in Porous Media
Yuri Volkov、Siobhán Mitchell、Nikolai Gaponik 等 7 位作者2004-10-14ChemPhysChem
Watching nanowires grow! Self-organization of CdTe nanocrystals into luminescent nanowires (see picture) takes place in a standard physiological phosphate-buffered solution and is completed in several hours, as demonstrated in situ by means of confocal microscopy. Luminescence and Raman spectroscopy data evidence the…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanowire Synthesis and Applications
Defeng Li、Yu Han、Jiangwei Song 等 7 位作者2004-10-14Chemistry - A European Journal
Highly ordered hexagonal mesoporous silica materials (JLU-20) with uniform pore sizes have been successfully synthesized at high temperature (150-220 degrees C) by using fluorocarbon-hydrocarbon surfactant mixtures. The fluorocarbon-hydrocarbon surfactant mixtures combine the advantages of both stable fluorocarbon sur…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisLayered Double Hydroxides Synthesis and Applications
Brian P. Grady、Han Goossens、Mariëlle Wouters2004-10-14Macromolecules
X-ray absorption spectroscopy (EXAFS) was used to characterize zinc-neutralized ionomers made from ethylene−propylene copolymers with grafted maleic anhydride units (Zn-MAn- g -EPM). The structure of the zinc moieties in the dry system consisted of two chelating carboxylate groups around one zinc atom a structure much…
Corrosion Behavior and InhibitionPolymer crystallization and propertiesElectron and X-Ray Spectroscopy Techniques
Elena Groppo、Carmelo Prestipino、Carlo Lamberti 等 8 位作者2004-10-14Physical Review B
In a recent contribution [Phys. Rev. Lett. 91, 046101 (2003)] we used polarization-dependent, $\mathrm{Ni}$ $K$ edge, x-ray absorption spectroscopy (XAS) to probe the structure of ultrathin $\mathrm{NiO}$ epilayers deposited on $\mathrm{Ag}(001)$. In that experiment samples were measured ex-situ and a $5\phantom{\rule…
ZnO doping and propertiesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
H. R. Sharma、V. Fournée、Masahiko Shimoda 等 7 位作者2004-10-14Physical Review Letters
Based on scanning tunneling microscopy of the fivefold surface of the icosahedral Al-Cu-Fe quasicrystal and the refined structure model of the isostructural i-Al-Pd-Mn, we present evidence that the surface corresponds to bulk truncations at the positions where blocks of atomic layers are separated by larger interlayer…
Quasicrystal Structures and PropertiesX-ray Diffraction in CrystallographyMineralogy and Gemology Studies
Bin Liu、Min-Feng Yu、Yonggang Huang2004-10-14Physical Review B
The effect of interlayer lattice registry on the formation of fully collapsed single wall carbon nanotubes (SWCNTs) was studied via atomistic simulation. It was found that a fully collapsed SWCNT could adopt various structural morphologies, such as a straight ribbon, a warping ribbon, or even a twisted ribbon. Such st…
Carbon Nanotubes in CompositesGraphene research and applicationsIon-surface interactions and analysis
Daming Cheng、Haibing Xia、Hardy Sze On Chan2004-10-14Langmuir
A one-step sequential method for preparing AgCl@polypyrrole-chitosan core-shell nanoparticles and subsequently the formation of polypyrrole-chitosan hollow nanospheres is reported. The formation of the core and the shell is performed in one reaction medium almost simultaneously. Transmission electron microscopy (TEM)…
Electrochemical sensors and biosensorsConducting polymers and applicationsNanomaterials for catalytic reactions
Başar Bilgiçer、Krishna Kumar2004-10-14Proceedings of the National Academy of Sciences
Control of structure and function in membrane proteins remains a formidable challenge. We report here a new design paradigm for the self-assembly of protein components in the context of nonpolar environments of biological membranes. An incrementally staged assembly process relying on the unique properties of fluorinat…
Lipid Membrane Structure and BehaviorRNA and protein synthesis mechanismsSupramolecular Self-Assembly in Materials
Jaime Marian、Jaroslaw Knap、M. Ortíz2004-10-14Physical Review Letters
This Letter is concerned with the determination of the transition paths attendant to nanovoid growth in aluminum under hydrostatic tension. The analysis is, therefore, based on energy minimization at 0 K. Aluminum is modeled by the Ercolessi-Adams embedded-atom method, and spurious boundary artifacts are mitigated by…
Microstructure and mechanical propertiesMetal and Thin Film MechanicsSurface Treatment and Residual Stress
Jhinhwan Lee、Sebastian Eggert、H. Kim 等 6 位作者2004-10-14Physical Review Letters
Electronic standing waves with two different wavelengths were directly mapped near one end of a single-wall carbon nanotube as a function of the tip position and the sample bias voltage with high-resolution position-resolved scanning tunneling spectroscopy. The observed two standing waves caused by separate spin and c…
Carbon Nanotubes in CompositesQuantum and electron transport phenomenaMechanical and Optical Resonators
Seong-Hun Park、Hae Jin Kim2004-10-14Journal of the American Chemical Society
We were able to synthesize unidirectionally aligned copper hydroxide nanorods from two-dimensional copper hydroxide nitrate by anion exchange reaction using NaOH without any membrane or template. The structural conversion from Cu2(OH)3NO3 to Cu(OH)2 was confirmed by XRD and FT-IR data. The synthesized copper hydroxide…
Advanced Photocatalysis TechniquesCopper-based nanomaterials and applicationsLayered Double Hydroxides Synthesis and Applications
Ivan Vlassiouk、Alexey V. Krasnoslobodtsev、Sergei Smirnov 等 4 位作者2004-10-14Langmuir
The concept of using alumina nanoporous filters (AAO) modified with DNA for "label-free" detection and separation/purification of the target ss-DNA is demonstrated. The high surface density of DNA (4 x 10(12) cm(-2)) and high efficiency of hybridization (ca. 70%) in combination with increased effective surface area ma…
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesAnodic Oxide Films and Nanostructures
Naonori Kurokawa、Hiroyuki Yoshikawa、Nobuaki Hirota 等 5 位作者2004-10-14ChemPhysChem
Nanoparticles are attractive nanomaterials, since they exhibit unique physical and chemical properties. We have found that poly(substituted thiophene) nanoparticles, ranging in size from several tens to hundreds of nanometers, exhibit size-dependent characteristic spectroscopic properties and thermochromic behavior, w…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Jürgen Jopp、Holger Grüll、Rachel Yerushalmi‐Rozen2004-10-14Langmuir
The wetting behavior of water droplets on periodically structured hydrophobic surfaces was investigated. The effect of structure geometry, roughness, and relative pore fraction on the contact angles was investigated experimentally for droplets of size comparable to the size of the structures. It was found that surface…
Surface Modification and SuperhydrophobicityFluid Dynamics and Heat TransferAdhesion, Friction, and Surface Interactions
Xinyuan Zhao、Davide Ceresoli、David Vanderbilt2004-10-14arXiv
Realistic models of amorphous ZrO2 are generated in a ``melt-and-quench'' fashion using ab-initio molecular dynamics in a plane-wave pseudopotential formulation of density-functional theory. The structural properties of the resulting amorphous models are analyzed, with special attention to coordination statistics. The…
Materials Science