Lionel Salmon、P. Thuéry、Éric Rivière 等 5 位作者2003-02-25Chemical Communications
The dinuclear compound [CuL2(py)U(acac)2] has been synthesized by treating [Cu(H2L2)] with U(acac)4 (L2 = N,N'-bis(3-hydroxysalicylidene)-2-methyl-1,2-propanediamine) and shows the antiferromagnetic Cu-U interaction; the distinct magnetic behaviour of the trinuclear complexes [(CuL2)2U] (antiferromagnetic) and [[CuL1(…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
Hongjie Dai2003-02-25ChemInform
Abstract For Abstract see ChemInform Abstract in Full Text.
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
G. Mattei、G. De Marchi、C. Maurizio 等 7 位作者2003-02-25Physical Review Letters
A selective dealloying in bimetallic nanoclusters prepared by ion implantation has been found upon thermal annealing in oxidizing atmosphere or irradiation with light ions. In the first process, the incoming oxygen interacts preferentially with copper promoting Cu2O formation, therefore extracting copper from the allo…
Nonlinear Optical Materials StudiesNanocluster Synthesis and ApplicationsNanoporous metals and alloys
H. Konaka、Liang Wu、Megumu Munakata 等 6 位作者2003-02-25Inorganic Chemistry
Five novel silver(I) coordination polymers with cis-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3- thienyl)ethene (cis-dbe) were synthesized and are characterized in this paper. Treatment of AgCF(3)SO(3) or AgCF(3)CO(2) with cis-dbe afforded [Ag(2)(cis-dbe)(CF(3)SO(3))(2)] (1) and [Ag(2)(cis-dbe)(CF(3)CO(2))(2)] (2), and both…
Polyoxometalates: Synthesis and ApplicationsPhotochromic and Fluorescence ChemistryFree Radicals and Antioxidants
Thomas F. Middleton、David J. Wales2003-02-25The Journal of Chemical Physics
New geometry optimization techniques are introduced for characterizing local minima, transition states, and pathways corresponding to enthalpy surfaces at constant pressure. Results are obtained for comparison with the potential energy surfaces of model glass formers studied in previous work. The constant pressure con…
Material Dynamics and PropertiesGlass properties and applicationsTheoretical and Computational Physics
Franc Meyer、P. Kircher、Hans Pritzkow2003-02-25Chemical Communications
Unique tetranickel(II) complexes have been synthesized which incorporate genuine mu3-1,1,3 or mu4-1,1,3,3 bridging azido ligands. Identification of two distinct isomeric mu4-1,1,3,3 binding modes confirms the structural flexibility of the quadruply bridging azide.
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Changjun Zhang、Philip J. D. Lindan2003-02-25The Journal of Chemical Physics
The adsorption of water on the TiO2(110) surface has become the model process in efforts to understand metal oxide–aqueous solution interfaces. Considerable progress has been made in understanding low-coverage situations where first-principle calculations have been employed to good effect. However, current theory is l…
Iron oxide chemistry and applicationsCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Fatima Setifi、Lahcène Ouahab、Stéphane Golhen 等 5 位作者2003-02-25Inorganic Chemistry
The preparation, X-ray crystal structure, EPR data, and magnetic measurement of [Cu(II)(hfac)(2)(TTF-py)(2)](PF(6)).2CH(2)Cl(2), a novel material where the conducting and the localized spin systems are covalently linked through conjugated bridges, are reported. The partial oxidation of the TTF-type organic donor ligan…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryOrganic and Molecular Conductors Research
M. El Massalami、H. Takeya、K. Hirata 等 6 位作者2003-02-25arXiv
Extensive magnetization and magnetostriction measurements were carried out on a single crystal of GdNi2B2C along the main tetragonal axes. Within the paramagnetic phase, the magnetic and strain susceptibilities revealed a weak anisotropy in the exchange couplings and two-ion tetragonal-preserving alpha-strain modes. W…
Materials ScienceStrongly Correlated Electrons
Burkhard Militzer、Francois Gygi、Giulia Galli2003-02-25arXiv
Using first principles simulations we have investigated the structural and bonding properties of dense fluid oxygen up to 180 GPa. We have found that band gap closure occurs in the molecular liquid, with a "slow" transition from a semi-conducting to a poor metallic state occurring over a wide pressure range. At approx…
Materials ScienceSoft Condensed Matter
I. P. Daykov、T. D. Engeness、T. A. Arias2003-02-25arXiv
We present the first wavelet-based all-electron density-functional calculations to include gradient corrections and the first in a solid. Direct comparison shows this approach to be unique in providing systematic ``transparent'' convergence, convergence with a priori prediction of errors, to beyond chemical (millihart…
Materials Science
M. El Massalami、R. E. Rapp、F. A. B. Chaves 等 5 位作者2003-02-25arXiv
Zero-field specific heat of the single crystals RNi2B2C (R= Er, Ho, Dy, Tb, Gd) was measured within the temperature range 0.1 K
Materials ScienceSuperconductivity
I. P. Raevski、S. A. Prosandeev、S. M. Emelyanov 等 11 位作者2003-02-25arXiv
(1-x)PbMg1/3Nb2/3O3-(x)PbSc1/2Nb1/2O3 (PMN-PSN) solid solution crystals have been grown by the flux method in the whole concentration range. X-ray supercell reflections due to B-cation ordering were observed for as-grown crystals from the 0.1 < x < 0.65 compositional range. Though the ordered domains are rather large…
Materials Science
Emil Prodan、Peter Nordlander2003-02-25Nano Letters
Using the time-dependent LDA method, we investigate the tunability of the optical polarizability of small metallic nanoshells. We show that the energies of the two dipolar plasmon resonances vary with the ratio of shell thickness to particle radius in a manner similar to what has been predicted using classical Mie sca…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchMolecular Junctions and Nanostructures
Yasuchika Hasegawa、Masaki Yamamuro、Yuji Wada 等 6 位作者2003-02-25OpenAlex
Radiation rates and emission quantum yields of Eu(III) were modified using asymmetric deuterated Eu(III) complexes doped in poly(methyl methacrylate) (PMMA) deuterated tris-(hexafluoroacetylacetonato)europium(III) with phospine oxide in order to produce lowthreshold levels for laser transmission and amplifier emission…
Luminescence Properties of Advanced MaterialsAdvanced MRI Techniques and ApplicationsLanthanide and Transition Metal Complexes
P C Yen、Ruei‐San Chen、Y.S. Huang 等 6 位作者2003-02-24Journal of Physics Condensed Matter
The first-order Raman spectra of the transition metal dioxide OsO 2 with tetragonal rutile structure have been measured at room temperature. A linearly polarized argon laser light source and completely oriented single-crystal samples have made possible unambiguous determination of the four allowed Raman-active phonon…
Gas Sensing Nanomaterials and SensorsTransition Metal Oxide NanomaterialsCatalysis and Oxidation Reactions
John Carnagey、Diane Hern‐Anderson、John P. Ranieri 等 4 位作者2003-02-24Journal of Biomedical Materials Research Part B Applied Biomaterials
To date, no off-the-shelf graft has performed better than the autologous vessel in applications requiring small-bore (< 6-mm diameter) vascular grafts. Much research has been devoted to seeding endothelial cells on synthetic grafts to improve their long-term clinical performance. One key challenge is the ability to re…
Aortic Disease and Treatment ApproachesElectrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative Medicine
Xiao‐Ming Ren、Jing Ma、Changsheng Lu 等 6 位作者2003-02-24Dalton Transactions
The structures of two ion-pair complexes, which consist of 1-(4′-R-benzyl)pyridinium (R = NO2 (1), Br (2)) and bis(maleonitriledithiolato)cuprate(II), have been determined by X-ray single crystal analyses, and the results show the stacking patterns in 1 and 2 are different from each other although the difference betwe…
Perovskite Materials and ApplicationsOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
E Bouziane、M.D. Fontana、Mohamed Ayadi2003-02-24Journal of Physics Condensed Matter
The Raman scattering spectrum of the sodium niobate crystal, in both P and R phases, has been investigated from room temperature up to 440 ° C. The dependence of the low-frequency (LF) spectrum clearly reveals, for the first time, over a wide temperature range, the presence of a strong quasi-elastic scattering below a…
Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsAcoustic Wave Resonator Technologies
S. P. Alpay、Z.–G. Ban、J. V. Mantese2003-02-24Applied Physics Letters
A Landau–Ginzburg thermodynamic model is constructed and used to develop a methodology for analyzing temperature-graded ferroelectrics. Spatial nonuniformities in temperature are shown to give rise to nonuniformities in polarization with corresponding spatial variations. The magnitude and the sign of the polarization…
Ferroelectric and Piezoelectric MaterialsForce Microscopy Techniques and ApplicationsMagnetic Properties and Applications