Nadjet Ouali、J.‐P. Rivera、David Chapon 等 5 位作者2004-01-14Inorganic Chemistry
The model-free approach has been extended with the derivation of a novel three-nuclei crystal-field independent method for investigating isostructurality in nonaxial (i.e., rhombic) complexes along the lanthanide series. Application of this technique to the heterotrimetallic sandwich complexes [LnLu2(TACI-3H)2(H2O)6]3…
Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications
Nizamuddin Shaikh、Anangamohan Panja、Sanchita Goswami 等 8 位作者2004-01-14Inorganic Chemistry
A layered mixed-valence manganese complex, [Mn(II)(2)(bispicen)(2)(mu(3)-Cl)(2)Mn(III)(Cl(4)Cat)(2)Mn(III)(Cl(4)Cat)(2)(H(2)O)(2)](infinity), is synthesized and characterized structurally. It displays a slow magnetic relaxation and hysteresis effect.
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
Jörg Haberecht、Frank Krumeich、Hansjörg Grützmacher 等 4 位作者2004-01-14Chemistry of Materials
The synthesis of Si−B−N−C ceramic materials can be accomplished via two different routes using B-tris(trichlorosilylvinyl)borazine ( 2 ) as starting material. This silyl-functionalized ethinylborazine is obtained by Pt-catalyzed hydrosilylation of B, B‘, B‘ ‘-tri-ethynylborazine ( 1) with HSiCl 3 in quantitative yield…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
Yiqun Bai、P. Chiniwalla、Edmund Elce 等 7 位作者2004-01-14Journal of Applied Polymer Science
Abstract In the microelectronics industry, the drive for increasing device speed, level of functionality and shrinking size has placed significant demands on the performance characteristics of polymer dielectrics. In this study, a negative acting, photodefinable dielectric formulation based on a copolymer of decylnorb…
Polymer Nanocomposites and PropertiesSynthesis and properties of polymersSilicone and Siloxane Chemistry
Hubert S. Gill、M. Harmjanz、Javier Santamarı́a 等 5 位作者2004-01-14Angewandte Chemie
Außerordentlich große, planare Porphyrin-Systeme, zusammengesetzt aus 49 Nichtwasserstoffatomen in hochgradig delokalisierten π-Systemen, zeigen gemäß UV/Vis/NIR-Spektroskopie und Cyclovoltammetrie ausgesprochen niederenergetische Übergänge. Die gezeigten Spektren stammen von dem abgebildeten cis-Palladiumkomplex und…
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsMetal-Catalyzed Oxygenation Mechanisms
U. Wahl、E. Rita、J.G. Correia 等 5 位作者2004-01-14Physical Review B
The lattice location of copper in single-crystalline zinc oxide was studied by means of the emission channeling technique. Following 60-keV room-temperature implantation at a fluence of $2.3\ifmmode\times\else\texttimes\fi{}{10}^{13}{\mathrm{cm}}^{\ensuremath{-}2},$ the angular distribution of ${\ensuremath{\beta}}^{\…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Yaroslav Ryabov、Alexander Puzenko、Yuri Feldman2004-01-14Physical Review B
The specific features of relaxation kinetics in systems with different kinds of confinements are discussed in the paper. In contrast to the usual Arrhenius, Eyring, or Vogel-Fulcher-Tammann patterns, a quite unusual nonmonotonic dependence of relaxation time versus temperature is observed in such systems. Based on the…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesPolymer Nanocomposites and Properties
F.H. Reincke、Stephen G. Hickey、Willem K. Kegel 等 4 位作者2004-01-14Angewandte Chemie
2D-Kristalle durch Ladungsänderung: Dichte Schichten individuell geladener Nanokristalle bilden sich an der Grenzfläche zwischen wässriger und organischer Phase durch leichte Reduktion der Oberflächenladung. Die Schichten sind bemerkenswert robust und kriechen am Probenglas hinauf (siehe Bild). Diese Eigenschaft sollt…
Gold and Silver Nanoparticles Synthesis and ApplicationsCopper-based nanomaterials and applicationsNanocluster Synthesis and Applications
Michael B. Hursthouse、Mark E. Light、D.J. Price2004-01-14Angewandte Chemie International Edition
Imprismed metals: Hydrothermal crystallization of Fe and Co oxalates from extremely concentrated KBr solutions yield a coordination network where the paramagnetic metal ions are in rare coordination geometries (see structure). Both materials show a strong 1D magnetic character and for the FeII derivative no long-range…
Physics of Superconductivity and MagnetismMetal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexes
Ina T. Martin、Galiya Sh. Malkov、Carmen I. Butoi 等 4 位作者2004-01-14Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Materials deposited in continuous wave (cw) and pulsed low-pressure octafluoropropane (C3F8) and octafluorocyclobutane (c-C4F8) plasmas were characterized using Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy, static contact angle measurements, spectroscopic ellipsometry, and scanning…
Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchPlasma Diagnostics and Applications
D.S. Cati、Joan Ribas、Jordi Ribas‐Ariño 等 4 位作者2004-01-14Inorganic Chemistry
With the new substituted pyrazine ligand pyrazine-2,3-dicarboxylic acid bis[(pyridin-2-ylmethyl)amide], H(2)L, a binuclear complex [Cu(2)(LH)(Cl(3))(H(2)O)].H(2)O (1) and two [2 x 2]G grid complexes, [[Cu(4)(LH)(4)](ClO(4))(4)].5CH(3)OH.4H(2)O (2) and [[Ni(4)(LH)(4)]Cl(4)].5CH(3)CN.13H(2)O (3), have been synthesized a…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Marnie Haller、Jingdong Luo、Hongxiang Li 等 8 位作者2004-01-14Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Novel Lattice-Hardening Process To Achieve Highly Efficient and Thermally Stable Nonlinear Optical PolymersMarnie Haller, Jingdong Luo, Hongxiang Li, Tae-Dong Kim, Yi Liao, Bruce H. Robinson, Larry R. Dalton, and Alex K.-Y. JenVie…
Nonlinear Optical Materials ResearchNonlinear Optical Materials StudiesSynthesis and properties of polymers
Tsukasa Hatano、Ah‐Hyun Bae、Masayuki Takeuchi 等 8 位作者2004-01-14Angewandte Chemie International Edition
A templating method is used to create conductive polymers that have a helical superstructure. The driving force is an electrostatic interaction between the negative charge in a synthetic lipid and the cationic charge generated in the polymers during oxidative electrochemical polymerization of ethylenedioxythiophene (E…
Organic Electronics and PhotovoltaicsElectrochemical sensors and biosensorsConducting polymers and applications
Bertrand Bourlon、D. C. Glattli、Bernard Plaçais 等 7 位作者2004-01-14Physical Review Letters
We have studied the high-bias transport properties of the different shells that constitute a multiwalled carbon nanotube. The current is shown to be reduced as the shell diameter is decreased or the length is increased. We assign this geometrical dependence to the competition between the electron-phonon scattering pro…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Zhifeng Zhu、Zhiyong Qiao、Cuizhen Kang 等 4 位作者2004-01-14Journal of Applied Polymer Science
Abstract The influences of chemical structure of (meth)acrylate monomers, including the carbon atom number of alkyl ester groups and the α‐methyl group, on the adhesion of polyacrylate sizes to all‐polyester, pure cotton, and polyester/cotton blend fiber substrates are investigated by using an impregnated roving metho…
Textile materials and evaluationsMaterial Properties and Processing
R. Droppa、C. T. M. Ribeiro、A. R. Zanatta 等 5 位作者2004-01-14Physical Review B
Carbon nanotubes with different nitrogen contents were produced by the arc-discharge technique. The samples were first submitted to a concentration process (purification) and analyzed by x-ray photoelectron spectroscopy, electron-energy-loss spectroscopy, electron transmission, and scanning electron microscopy to stud…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
Tetsuo Asakura、Kohei Suita、Tsunenori Kameda 等 5 位作者2004-01-14Magnetic Resonance in Chemistry
The influence of the bulky and H-bonding Tyr side-chain on its Ala- and Gly-rich environment in Bombyx mori silk fibroin was examined by (13)C cross-polarization magic angle spinning (CP/MAS), static (2)H and (19)F NMR and molecular mechanics calculations. Model peptides of the type (AG)(15) were synthesized with Tyr…
Neurobiology and Insect Physiology ResearchAntimicrobial Peptides and ActivitiesSilk-based biomaterials and applications
Detlef Reichert、Ovidiu Pascui、Eduardo R. deAzevedo 等 6 位作者2004-01-14Magnetic Resonance in Chemistry
We report solid-state NMR investigations of the effect of temperature and hydration on the molecular mobility of collagen isolated from bovine achilles tendon. (13)C cross-polarization magic angle spinning (MAS) experiments were performed on samples at natural abundance, using NMR methods that detect motionally averag…
Protein Structure and DynamicsBone health and osteoporosis researchCollagen: Extraction and Characterization
Hubert S. Gill、M. Harmjanz、Javier Santamarı́a 等 5 位作者2004-01-14Angewandte Chemie International Edition
Exceedingly large, planar porphyrin systems composed of 49 non-hydrogen nuclei in highly delocalized π systems display exceptionally low-energy transitions in UV/Vis/NIR spectroscopy and in cyclic voltammetry. The spectra shown are for cis palladium complex depicted and the corresponding trans isomer
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsMetal-Catalyzed Oxygenation Mechanisms
Craig L. Hill2004-01-14Angewandte Chemie International Edition
Increased stability of oxidation catalysts results from the self-assembly of the catalysts under near-turnover conditions from oxidatively resistant precursors. The described polyoxometalate epoxidation catalyst uses a green oxidant (H2O2), solvent, and separation conditions and is fast, selective, and safe. This self…
Polyoxometalates: Synthesis and ApplicationsChemical Synthesis and ReactionsOxidative Organic Chemistry Reactions