Antonio Doménech‐Carbó、Hermenegildo Garcı́a、Isabel Casades 等 4 位作者2004-11-23The Journal of Physical Chemistry B
The electrochemical response of open/closed forms of 6-nitro-1‘,3‘,3‘-trimethylspiro[2 H -1-benzopyran-2,2‘-indoline] ( SP ) associated with zeolite Y ( SP@Y ) and MCM-41 silicates with or without framework Al ( SP@AlMCM and SP@MCM, respectively) is described upon immersion of zeolite-modified polymer film electrodes…
Porphyrin and Phthalocyanine ChemistryElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors
Marco Covarrubias‐Cervantes、Sébastien Bongard、Dominique Champion 等 4 位作者2004-11-23Flavour and Fragrance Journal
Abstract The solubility of nine aroma compounds (acetone, 2‐butanone, 2‐hexanone, 2‐octanone, ethyl acetate, ethyl butanoate, ethyl hexanoate, n ‐hexanal, and n ‐hexanol) in both water and various aqueous solutions was measured at 25 °C using the mutual solubility method. The aqueous solutions consisted of sucrose, gl…
Analytical Chemistry and ChromatographyCrystallization and Solubility StudiesChemical and Physical Properties in Aqueous Solutions
Maurizio Fermeglia、A. Cudicio、G. DeSimon 等 5 位作者2004-11-23Fuel Cells
Abstract In the framework of electricity production from molten carbonate fuel cells (MCFC), this work presents the results obtained from steady state process simulation, coupled with a detailed dynamic model for the cell. The derivation of the model is briefly outlined, and detailed results of the simulation are repo…
Advancements in Solid Oxide Fuel CellsFuel Cells and Related MaterialsCatalysis and Hydrodesulfurization Studies
Nobuyuki Nakajima、E. R. Harrell2004-11-23Journal of Applied Polymer Science
Abstract The viscosity of freshly prepared poly(vinyl chloride) (PVC) plastisol increases with time, and this phenomenon is called viscosity aging . The increase is rapid in the beginning and slows down to a quasistable value, but a very slow increase continues. The phenomenon may be a result of either the deagglomera…
Polymer crystallization and propertiesMaterial Properties and ProcessingPolymer Science and PVC
Róbert Huszánk、Ottó Horváth2004-11-23Chemical Communications
Water-soluble ferrous porphyrin (Fe(II)TPPS) was prepared by complexation reaction of free base porphyrin (H2TPPS) with iron(II) ions in the presence of iron(III)-trapping acetate buffer; the catalytic and photoinduced properties of this air-stable complex proved unambiguously its sitting-atop structure.
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsHemoglobin structure and function
Giorgio Zoppellaro、Volker Enkelmann、Ahmed A. Geies 等 4 位作者2004-11-23Organic Letters
[structure: see text] Synthesis and UV-vis, IR, and EPR spectroscopic characterizations, together with X-ray structural analysis, of functional nitronyl- and iminonitroxides attached to pyrazolylbipyridine are described. The exchange interactions between the nitronylnitroxides are found to be stronger than for the imi…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
J. P. Ngantcha、M. Gerland、Y. Kihn 等 4 位作者2004-11-23The European Physical Journal Applied Physics
Internal oxidized copper was tested by isothermal mechanical spectroscopy in a medium temperature range (300–600 K). Experimental results show the existence of a non-thermally activated effect at low temperature and of a relaxation peak at higher temperatures. The material microstructure was studied by combination of…
ZnO doping and propertiesMicrostructure and mechanical propertiesCopper-based nanomaterials and applications
Cara L. Jenkins、Alexander I. McCloskey、Ilia A. Guzei 等 5 位作者2004-11-23Biopolymers
In collagen, strands of the sequence XaaYaaGly form a triple-helical structure. The Yaa residue is often (2S,4R)-4-hydroxyproline (Hyp). The inductive effect of the hydroxyl group of Hyp residues greatly increases collagen stability. Here, electron withdrawal by the hydroxyl group in Hyp and its 4S diastereomer (hyp)…
Chemical Synthesis and AnalysisProtein Hydrolysis and Bioactive PeptidesCollagen: Extraction and Characterization
Maria Daghofer、Andrzej M. Oleś、Wolfgang von der Linden2004-11-23Physical Review B
We study an effective one-dimensional (1-D) orbital $t\text{\ensuremath{-}}J$ model derived for strongly correlated ${e}_{g}$ electrons in doped manganites. The ferromagnetic spin order at half filling is supported by orbital superexchange $\ensuremath{\propto}J$ which stabilizes orbital order with alternating ${x}^{2…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Carlos Frontera、J. L. Garcı́a-Muñoz、A.E. Carrillo 等 6 位作者2004-11-23Physical Review B
We have investigated the structural and magnetic properties of ${\mathrm{PrBaCo}}_{2}{\mathrm{O}}_{5+\ensuremath{\delta}}$ $(\ensuremath{\delta}\ensuremath{\simeq}0.75)$ layered cobaltite. By means of neutron and synchrotron x-ray powder diffraction we have determined the ordered distribution of oxygen vacancies in ${…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsThermal Expansion and Ionic Conductivity
Andrew J. Boydston、Brian L. Pagenkopf2004-11-23Angewandte Chemie International Edition
A brighter future for siloles. Luminescent silole chromophores with the highest quantum efficiencies reported for a fully substituted monomeric silole are generated by altering the steric properties of the substituent groups. Treatment of 1,1-dimethylsiloles with Bu4NF (TBAF) in THF rapidly gives stereospecific desily…
Organic Light-Emitting Diodes ResearchRadical Photochemical ReactionsLuminescence and Fluorescent Materials
P. Franz、C. Ambrus、Andreas Hauser 等 12 位作者2004-11-23Journal of the American Chemical Society
The compound of stoichiometry Mn(II)3[Mn(III)(CN)6]2.zH2O (z = 12-16) (1) forms air-stable, transparent red crystals. Low-temperature single crystal optical spectroscopy and single crystal X-ray diffraction provide compelling evidence for N-bonded high-spin manganese(II), and C-bonded low-spin manganese(III) ions arra…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
Seon‐Jeong Lim、Byeong‐Kwan An、Sang Don Jung 等 5 位作者2004-11-23Angewandte Chemie
Mehr hilft mehr: Fluoreszierende photochrome organische Nanopartikel (FPONs) aus 1 (siehe Bild) zeigen eine mit zunehmender Konzentration stark ansteigende Fluoreszenzemission sowie eine bistabile Photochromie. Ein kontrastreiches Ein/Aus-Schalten der Fluoreszenz wurde in größenabgestimmten FPONs aus 1 und in einem wi…
Luminescence and Fluorescent MaterialsPhotochromic and Fluorescence ChemistryPolydiacetylene-based materials and applications
Hideki Ohtsu、Koji Tanaka2004-11-23Angewandte Chemie International Edition
Fine-tuning the N-donor ability of a bidentate aminopyridyl ligand facilitated the selective synthesis of complexes 1 (no methyl substituent) and 2 (with a methyl substituent) which possess valence tautomeric nickel(II) semiquinonato and nickel(III) catecholato frameworks, respectively.
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Changhai Liang、Wei Xia、Hamideh Soltani-Ahmadi 等 6 位作者2004-11-23Chemical Communications
Highly dispersed palladium nanoparticles supported on carbon nanofibers, which show high catalytic activity and stability in the hydrogenation of cyclooctene, were synthesized by the two-step metal organic chemical vapor deposition (MOCVD) of allylcyclopentadienylpalladium (Pd(allyl)Cp) as precursor at atmospheric pre…
Carbon Nanotubes in CompositesGraphene research and applicationsMolecular Junctions and Nanostructures
D.V. Soldatov、Igor Moudrakovski、John A. Ripmeester2004-11-23Angewandte Chemie
Robuste poröse Gerüste werden von den Dipeptiden L-Ala-L-Val (siehe Bild) und L-Val-L-Ala gebildet, die mit hoher Kapazität und Selektivität zur Gas-Sorption geeignet sind. Die Dipeptide ordnen sich unter Bildung von Wasserstoffbrücken als 61-Helices an, wobei Kanäle mit mittleren Durchmessern von 5.13 bzw. 4.90 Å ent…
Metal-Organic Frameworks: Synthesis and ApplicationsSupramolecular Self-Assembly in MaterialsCovalent Organic Framework Applications
Joong Tark Han、Xurong Xu、Do Hwan Kim 等 4 位作者2004-11-23Chemistry of Materials
We demonstrate that amorphous calcium carbonate (ACC) thin film crystallization on poly(ε-caprolactone) (PCL), poly(bisphenol A carbonate) (PC), poly( tert -butyl acrylate) (PtBA), and poly(methyl methacrylate) (PMMA) substrates is affected by the chain mobility and functionality of the polymers above and below their…
Bone Tissue Engineering MaterialsCalcium Carbonate Crystallization and InhibitionBuilding materials and conservation
Laura Hansen、Daniel J. Smith、Darrell H. Reneker 等 4 位作者2004-11-23Journal of Applied Polymer Science
Abstract Electrospun nanofibers are made when electrostatic forces overcome the surface tension of a polymer solution, causing an electrically charged jet to be ejected; as the jet travels through the air, the solvent evaporates, leaving behind an electrically charged fiber, which can be collected in the form of a non…
Advanced Sensor and Energy Harvesting MaterialsElectrospun Nanofibers in Biomedical ApplicationsElectrohydrodynamics and Fluid Dynamics
Xuping Sun、Shaojun Dong、Erkang Wang2004-11-23Angewandte Chemie
Die chemische Reduktion von H[AuCl4] mit ortho-Phenylendiamin in wässriger Phase bei Raumtemperatur und Normaldruck ermöglicht die Synthese von einige Mikrometer langen Au-Nanotäfelchen (siehe SEM-Bild). Die Täfelchen fallen als Einkristalle mit einer Vorzugswachsrichtung entlang der Au-(111)-Ebene und vorwiegend hexa…
Gold and Silver Nanoparticles Synthesis and ApplicationsNanocluster Synthesis and ApplicationsNanomaterials for catalytic reactions
Yu. A. Nastishin、H. Liu、Sergij V. Shiyanovskii 等 6 位作者2004-11-23Physical Review E
We have studied isotropic-to-nematic pretransitional fluctuations in an aqueous solution of disodium cromoglycate (cromolyn) by static and dynamic light scattering. Cromolyn is a representative of lyotropic chromonic liquid crystals with building units being elongated rods formed by aggregates of disk-like molecules.…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality