Stephen Faulkner、Benjamin P. Burton‐Pye、T. Khan 等 6 位作者2002-07-04Chemical Communications
Tetrathiafulvalene carboxylate associates with the charge neutral complex, Yb.DO3A, in methanolic solution to give rise to a novel ternary species; the tetrathiafulvalene unit transfers energy to the lanthanide, causing luminescence from the Yb metal, indicating for the first time that an electron donor chromophore ca…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
J-H Guo、Lionel Vayssières、Clas Persson 等 5 位作者2002-07-04Journal of Physics Condensed Matter
Polarization-dependent x-ray absorption measurements were performed on crystalline ZnO three-dimensional arrays consisting of highly oriented microrods as well as on particulate thin films consisting of monodisperse spherical nanoparticles. Strong anisotropic effects have been observed for the highly oriented ZnO rods…
ZnO doping and propertiesMultiferroics and related materialsGa2O3 and related materials
Soonki Kang、Jong‐Sung Yu、Michał Kruk 等 4 位作者2002-07-04Chemical Communications
An ordered macroporous carbon with 62 nm spherical pores was synthesized using colloidal-crystal templating and found to exhibit unique gas adsorption properties that have been so far attributed to adsorption in mesopores (size below 50 nm).
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisCovalent Organic Framework Applications
Jeong Won Kang、Jae Jeong Seo、Ki Ryang Byun 等 4 位作者2002-07-04arXiv
We have performed atomistic simulations for cylindrical multi-shell (CMS)-type Cu nanowires containing defects. Our investigation has revealed some physical properties that have not been detected in previous studies that have considered defect-free nanowires. Since the vacancy formation energy is lowest in the core of…
Materials Science
S. X. Dou、A. V. Pan、S. Zhou 等 8 位作者2002-07-04arXiv
We investigated the effect of SiC nano-particle doping on the crystal lattice structure, critical temperature T_c, critical current density J_c, and flux pinning in MgB_2 superconductor. A series of MgB_{2-x}(SiC)_{x/2} samples with x = 0 to 1.0 were fabricated using in-situ reaction process. The contraction of the la…
Materials ScienceSuperconductivity
Bruce P. Lee、Jeffrey L. Dalsin、Phillip B. Messersmith2002-07-04OpenAlex
3,4-Dihydroxyphenylalanine (DOPA) residues are known for their ability to impart adhesive and curing properties to mussel adhesive proteins. In this paper, we report the preparation of linear and branched DOPA-modified poly(ethylene glycol)s (PEG-DOPAs) containing one to four DOPA endgroups. Gel permeation chromatogra…
biodegradable polymer synthesis and propertiesPolymer Surface Interaction StudiesCollagen: Extraction and Characterization
Peter K. Stoimenov、Rosalyn L. Klinger、George L. Marchin 等 4 位作者2002-07-04OpenAlex
Reactive magnesium oxide nanoparticles and halogen (Cl 2, Br 2 ) adducts of these MgO particles were allowed to contact certain bacteria and spore cells. Bacteriological test data, atomic force microscopy (AFM) images, and electron microscopy (TEM) images are provided, which yield insight into the biocidal action of t…
Electronic and Structural Properties of OxidesMagnesium Oxide Properties and ApplicationsNanotechnology research and applications
Christine Gieck、Wolfgang Tremel2002-07-03Chemistry - A European Journal
The novel quaternary uranium thiophosphate K11U7(PS4)13 has been synthesized by reacting uranium metal, K2S, S, and P2S5 at 700 degrees C in an evacuated silica tube. The crystal structure was determined by single crystal X-ray diffraction techniques. K11U7(PS4)13 crystallizes in the tetragonal space group I42d (a = 3…
Crystal Structures and PropertiesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
T. Hertzsch、Felix Budde、Edwin Weber 等 4 位作者2002-07-03Angewandte Chemie
Effizienter Gastaustausch: In einer Iodatmosphäre zeigt das organische Zeolithanalogon TPP⋅x(THF) (x=0.35–0.6) eine sofortige I2-Sorption. Der zuvor farblose Kristall (a) färbt sich an den Kristallenden (b) und ist nach 1–2 Tagen vollständig mit I2 durchdrungen (c). Die elektrische Leitfähigkeit der TPP⋅y(I2)-Kristall…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesAdvanced NMR Techniques and Applications
Pierre Mialane、Anne Dolbecq、Laurent Lisnard 等 6 位作者2002-07-03Angewandte Chemie
Sechs Mo-Dimere, die um ein zentrales PO4-Tetraeder gruppiert sind, bilden den Kern des neuartigen, von vier {La(H2O)4}3+-Einheiten umgebenen ε-Keggin-Polyoxokations [ε-PMo12O36(OH)4{La(H2O)4}4]5+ (siehe Struktur). 31P-NMR-spektroskopische Untersuchungen ergaben, dass ε-Keggin-Ionen in wässriger Lösung nicht stabil si…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Jianxin Guo、K. A. Narh2002-07-03Advances in Polymer Technology
Abstract A stress‐induced crystallization model for semicrystalline plastics is proposed based on the theory that stress‐induced orientation of molecules and chains increase the melting temperature of thermoplastics, and hence, the supercooling which is the driving force for crystallization. By assuming that the effec…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesAdditive Manufacturing and 3D Printing Technologies
A. Trapananti、Andrea Di Cicco、Marco Minicucci2002-07-03Physical review. B, Condensed matter
A detailed investigation of local structure and phase transitions in copper iodide (CuI), at high temperatures, has been carried out performing x-ray absorption spectroscopy (XAS), x-ray absorption temperature scans, and energy scanning x-ray diffraction measurements. Low-noise XAS spectra have been recorded in a wide…
Theoretical and Computational PhysicsX-ray Spectroscopy and Fluorescence AnalysisX-ray Diffraction in Crystallography
Jianjun Wang、L. Grocholl、Edward G. Gillan2002-07-03Nano Letters
This report describes a straightforward, metathesis (exchange) reaction between gallium chloride and sodium azide that produces gallium nitride nanoparticles below 210 °C. Slowly heating these two reagents together circumvents rapid, exothermic reactions, which can decompose the nitride product. The resulting GaN powd…
GaN-based semiconductor devices and materialsQuantum Dots Synthesis And PropertiesSemiconductor materials and devices
Gregory S. Owens、Armando Durazo、Mahdi M. Abu‐Omar2002-07-03Chemistry - A European Journal
The kinetics of oxygen-atom transfer from the peroxo complexes of methyltrioxorhenium (MTO) to alkenes in ionic liquids have been investigated. Noncatalytic conversions of alkenes to epoxide were monitored by UV/Vis at 360 nm, where the monoperoxorhenium (mpRe) and diperoxorhenium (dpRe) complexes absorb. Water- and p…
Polyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation ReactionsOxidative Organic Chemistry Reactions
Catherine P. Raptopoulou、V. Tangoulis、E. Devlin2002-07-03Angewandte Chemie International Edition
New wheels: The 1:2 reaction of ferric nitrate with benzilic acid (Ph2C(OH)COOH) in methanol at pH≈4.0 results in the formation of a new member of the molecular ferric-wheels family with the carboxylatobis(alkoxo) bridging unit. The molecular structure of [{Fe(OMe)2[Ph2C(OH)COO]}12] (see picture) consists of a centros…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Huub Maas、Gion Calzaferri2002-07-03Angewandte Chemie
Zapfenförmige Fluorophore an den Ausgängen von Zeolith-L-Kanälen können elektronische Anregungsenergie von Pyronin+-Molekülen im Innern des Kristalls abfangen (siehe Schema, oben). Den umgekehrten Vorgang, d. h. das Einspeisen elektronischer Anregungsenergie durch solche „Zapfen“ (unten), erreicht man mit Oxonin+-Mole…
Conducting polymers and applicationsPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
Anita Müller、Jiangqiang Peng、Hans Jürgen Seifert 等 5 位作者2002-07-03Chemistry of Materials
Starting from five different Si−B−C−N polymeric precursors with B/N atomic ratios ranging from 1:3 to 1:0.5, ceramic materials were synthesized by thermolysis at 1400 °C in about 70−75% yield. During this transformation, the Si/B/N ratio remained roughly constant, whereas H and C contents were reduced. The crystalliza…
Advanced ceramic materials synthesisMXene and MAX Phase MaterialsAdvanced materials and composites
Yuta Takahashi、Akihiko Ueno、Hisakazu Mihara2002-07-03ChemBioChem
The amyloid fibril is a misfolded and undesirable state for proteins that has been proposed to be a causative agent for a variety of fatal diseases known as amyloid diseases, such as Alzheimer's and prion diseases. However, the fibril has a highly ordered tertiary structure in which numerous beta-strand polypeptide ch…
Chemical Synthesis and AnalysisSupramolecular Self-Assembly in MaterialsClick Chemistry and Applications
Miłosz Pawlicki、Lechosław Latos‐Grażyński、Ludmiła Szterenberg2002-07-03The Journal of Organic Chemistry
An oxa-analogue of 5,10,15-triarylcorrole, i.e., 5,10,15-triaryl-21,23-dioxacorrole (21,23-O(2)Cor)H, where two pyrrole rings are replaced by furan moieties, has been produced by condensation of 2,5-bis(arylhydroxymethyl)furan, 2-phenylhydroxymethylfuran, and pyrrole. 2-Phenylhydroxymethylfuran serves as the suitable…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
Navamoney Arulsamy、D. Scott Bohle、Jerome A. Imonigie 等 4 位作者2002-07-03Angewandte Chemie International Edition
Ligand formed by CN bond cleavage: Transition-metal-promoted heterolytic cleavage of the CN bond in 1 results in the formation of five new complexes of cis hyponitrite with Group 10 transition metals. The new complexes include [Ni(η2-O2N2)(dppf)] (dppf=1,1′-bis(diphenylphosphanyl)ferrocene) which is structurally cha…
Organometallic Complex Synthesis and CatalysisMetal complexes synthesis and propertiesMagnetism in coordination complexes