Bin Du、E.A. Meyers、Sheldon G. Shore2001-07-13Inorganic Chemistry
Sheet- and column-like cyanide bridged lanthanide-transition metal arrays were synthesized through metathesis reactions between anhydrous LnCl(3) (Ln = Eu, Yb) and A(2)[M(CN)(4)] (A = K(+), NH(4)(+); M = Ni, Pt) in a 1:2 molar ratio in DMF (DMF = N,N-dimethylformamide) solution. Single-crystal X-ray analysis revealed…
Magnetism in coordination complexesSynthesis and characterization of novel inorganic/organometallic compoundsLanthanide and Transition Metal Complexes
Xiankai Sun、Darren W. Johnson、Kenneth N. Raymond 等 4 位作者2001-07-13Inorganic Chemistry
The solid-state, gas-phase, and solution characterization of the predesigned cluster Cs[(SnL3)2Ag3] is presented (L = 4-(diphenylphosphino)benzene-1,2-diol). The solid-state structure confirms formation of a C3h mesocate featuring three silver(I) cations linking two enantiomeric {SnL3}2- halves and encapsulating a Cs+…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials
Robert W. Meulenberg、Geoffrey F. Strouse2001-07-13The Journal of Physical Chemistry B
The organic passivant layer on nanomaterial surfaces has been examined by correlating the phase behavior of the passivant using attenuated total reflection infrared spectroscopy (ATR-IR), coupled with differential scanning calorimetry (DSC). The thermodynamic melting dynamics in the passivant layer supports the descri…
Quantum Dots Synthesis And PropertiesMolecular Junctions and NanostructuresSurface Chemistry and Catalysis
Athanasios B. Bourlinos、A. Simopoulos、Nikos Boukos 等 4 位作者2001-07-13The Journal of Physical Chemistry B
Chemisorption of propionic acid vapors by an iron impregnated MCM-41 porous silica leads to the formation of iron−propionate species that upon pyrolysis can be transformed into γ-Fe 2 O 3 nanoparticles of uniform size (∼150 Å) and homogeneously dispersed on the external surfaces of the porous silica support. The effec…
Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Susana Martı́n、Gotzone Barandika、Luís Lezama 等 9 位作者2001-07-13Inorganic Chemistry
Four compounds of general formula [M(4,4'bipy)(N(3))2](n) (M = Mn (1), Zn (2), Co (3), Ni (4)) have been synthesized and magnetostructurally characterized by means of X-ray diffraction analysis, IR and ESR spectroscopies, and measurements of the magnetic susceptibility and magnetization. Compound 1 (C(10)H(8)N(8)Mn) c…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Jong Ho Yeo、Chong Hoon Lee、Chan‐Seok Park 等 6 位作者2001-07-13Advances in Polymer Technology
Abstract Using the biaxially oriented film process, polypropylene (PP)/ethylene‐vinyl alcohol copolymer (EVOH) blends with an improved barrier property could be obtained by generating a laminar structure of the dispersed phase in the matrix phase. This laminar morphology, induced by biaxial orientation, was found to r…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Sacha Hilic、Séverine A.E. Boyer、Agı́lio A. H. Pádua 等 4 位作者2001-07-13Journal of Polymer Science Part B Polymer Physics
Abstract New experimental results for the solubility of nitrogen and carbon dioxide in polystyrene are reported, accompanied by data on the change in volume of the polymer caused by the sorption process. The two phenomena were measured simultaneously with a combined technique, in which the quantity of penetrating flui…
Polymer crystallization and propertiesPhase Equilibria and ThermodynamicsPolymer Foaming and Composites
René Androsch、Bernhard Wunderlich2001-07-13Macromolecules
Reversible crystallization and melting in isotactic polypropylene are suggested to occur at the lateral crystal surface by correlation of the amount of reversibility to the structure observed by atomic force microscopy. The degree of reversibility is monitored on heating using temperature-modulated differential scanni…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Montserrat Rodrı́guez、Isabel Romero、Antoni Llobet 等 7 位作者2001-07-13Inorganic Chemistry
We have prepared a new family of ruthenium complexes containing the bpea ligand (where bpea stands for N,N-bis(2-pyridyl)ethylamine), with general formula [Ru(bpea)(bpy)(X)](n+) (2, X = Cl(-); 3, X = H(2)O; 4, X = OH(-)), and the trisaqua complex [Ru(bpea)(H2O)(3)](2+), 6. The complexes have been characterized through…
Metal complexes synthesis and propertiesPolyoxometalates: Synthesis and ApplicationsOxidative Organic Chemistry Reactions
Narayan Chandra Das、T. K. Chaki、Dipak Khastgir 等 4 位作者2001-07-13Advances in Polymer Technology
Abstract Conductive rubber‐based composites were derived from EVA, EPDM, and 50/50 EVA/EPDM blend filled with carbon black and short carbon fiber (SCF). The electromagnetic interference (EMI) shielding effectiveness and return loss were studied. The measurements of shielding effectiveness (SE) of the composites were c…
Electromagnetic wave absorption materialsElectromagnetic Compatibility and Noise SuppressionElectromagnetic Compatibility and Measurements
D. Alfe`、G. D. Price、M. J. Gillan2001-07-13arXiv
{\em Ab initio} techniques based on density functional theory in the projector-augmented-wave implementation are used to calculate the free energy and a range of other thermodynamic properties of liquid iron at high pressures and temperatures relevant to the Earth's core. The {\em ab initio} free energy is obtained by…
Materials Science
P. E. Jönsson、J. L. Garcia-Palacios2001-07-13arXiv
Thermodynamic perturbation theory is employed to derive analytical expressions for the equilibrium linear susceptibility and specific heat of lattices of anisotropic classical spins weakly coupled by the dipole-dipole interaction. The calculation is carried out to the second order in the coupling constant over the tem…
Materials Sciencecond-mat.stat-mech
Slava V. Rotkin2001-07-13arXiv
Theoretical study of graphite (graphene) edge is done. The most stable edge orientation is calculated to be a zigzag [110] edge. Possible applications of the result to the formation of different graphitic structures are discussed.
Materials Science
Debdeep Jena、Umesh K. Mishra2001-07-13arXiv
We present a theory of deformation potential carrier scattering of two-dimensional electron gases from the strain fields surrounding dislocations. The results are applied to study the transport characteristics in III-V nitride two-dimensional electron gases in Al(Ga)N/GaN quantum wells. A hypothetical charged core has…
Materials Science
Claudio Grimaldi、Peter Ryser、S. Strässler2001-07-12Physical review. B, Condensed matter
We study the piezoresistive response and its anisotropy for a bond-percolation model of granular metals. Both effective-medium results and numerical Monte Carlo calculations of finite simple-cubic networks show that the piezoresistive anisotropy is a strongly dependent function of bond probability p and of bond conduc…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectrical and Thermal Properties of Materials
N. D. Zhigadlo、Ming Zhang、Ekhard K. H. Salje2001-07-12Journal of Physics Condensed Matter
The temperature evolution of the infrared powder spectra of lithium tetraborate Li 2 B 4 O 7 has been measured in the infrared region 50-1600 cm -1 and over a temperature range between 20 K and 680 K. In contrast to the sharp B-O bands, the Li-related bands in the region between 300 cm -1 and 510 cm -1 are rather broa…
High-pressure geophysics and materialsCrystal Structures and PropertiesX-ray Diffraction in Crystallography
Eugenio Notomista、Francesca Catanzano、Giuseppe Graziano 等 6 位作者2001-07-12Biochemistry
Onconase, a member of the RNase A superfamily, is a potent antitumor agent which is undergoing phase III clinical trials as an antitumor drug. We have recently shown that onconase is an unusually stable protein. Furthermore, the protein is resistant to the action of proteases, which could influence its use as a drug,…
Protein Structure and DynamicsPhotosynthetic Processes and MechanismsEnzyme Structure and Function
P. Lablanquie、S A Sheĭnerman、F. Penent 等 7 位作者2001-07-12Physical Review Letters
Two Auger electrons, one very slow, one fast, have been detected in coincidence following near threshold 4d photoionization of the Xe atom. The distribution in the energy the two electrons share has been measured for the first time revealing the presence of post-collision interaction effects that provide unique inform…
Advanced Chemical Physics StudiesAtomic and Molecular PhysicsElectron and X-Ray Spectroscopy Techniques
C. Bedoya、Christophe Müller、J. L. Baudour 等 6 位作者2001-07-12Journal of Physics Condensed Matter
Neutron powder diffraction data, collected over the temperature range 10-810 K, have been analysed in order to study the ferroelectric-paraelectric transition in the ferroelectric compound PbHf 0.2 Ti 0.8 O 3 . This transition appears at 670 K between the low-temperature tetragonal phase and the high-temperature cubic…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsX-ray Diffraction in Crystallography
Tatyana A. Konovalova、Yunlong Gao、Rainer Schad 等 6 位作者2001-07-12The Journal of Physical Chemistry B
Photooxidation of β -carotene and canthaxanthin in mesoporous MCM-41, Ni-MCM-41, and Al-MCM-41 molecular sieves was studied by 9−220 GHz electron paramagnetic resonance (EPR) and 9 GHz electron nuclear double resonance (ENDOR). X-ray powder diffraction (XRD) measurements established that the MCM-41 pore size (33 Å) wa…
Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and Applications