Ikuo Nakazawa、Mitsutoshi Masuda、Yuji Okada 等 7 位作者1999-05-27Langmuir
A series of nonionic sugar-based bolaamphiphiles having n -alkylene chain length of 9, 10, 11, 12, 13, 14, 16, or 18 carbon atoms, N,N ‘ -bis(2-deoxy- d -glucopyranosid-2-yl)alkane-1, n -dicarboxamide, 1( n ), have been synthesized in one step from commercially available glucosamine hydrochloride. Their self-assemblin…
biodegradable polymer synthesis and propertiesCarbohydrate Chemistry and SynthesisSupramolecular Self-Assembly in Materials
Guillem Aromı́、Michael J. Knapp、Juan-Pablo Claude 等 6 位作者1999-05-27Journal of the American Chemical Society
Reaction of R 2 dbmH (R = H, Me, Et; dbmH is dibenzoylmethane) with MnCl 3 (generated in situ from MnCl 2 and MnO 4 - ) in MeCN yields the five-coordinate, square-pyramidal complexes [MnCl(R 2 dbm) 2 ] (R = H, 1; Me, 4; Et, 7 ). The same reaction with MnBr 2 yields [MnBr(R 2 dbm) 2 ] (R = H, 2; Me, 5; Et, 8 ). Slow hy…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Peter B. Balanda、Michael B. Ramey、John R. Reynolds1999-05-27Macromolecules
Two new (dialkylamino)ethoxy-substituted poly( p -phenylene)s (PPP) have been prepared, poly[2,5-bis(3-{ N,N -diethylamino}-1-oxapropyl)-1,4-phenylene- alt -1,4-phenylene] (P−NEt 2 ) and poly[2,5-bis(3-{ N,N -dimethylamino}-1-oxapropyl)-1,4-phenylene- alt -1,4-phenylene] (P−NMe 2 ). These PPPs were synthesized via Pd-…
Advanced Polymer Synthesis and CharacterizationConducting polymers and applicationsLuminescence and Fluorescent Materials
L. Kipp、K. Rossnagel、J. Brugmann 等 7 位作者1999-05-27arXiv
Angle resolved photoemission spectroscopy (ARPES) has been commonly applied to evaluate the shape of Fermi surfaces by employing simple criteria for the determination of the Fermi vector k_F parallel to the surface such as maximum photoemission intensity at the Fermi level or discontinuity in the momentum distribution…
Materials ScienceSuperconductivity
Normand Mousseau、G. T. Barkema1999-05-27arXiv
At low temperatures, dynamics in amorphous silicon occurs through a sequence of discrete activated events that locally reorganize the topological network. Using the activation-relaxation technique, a data base containing over 8000 such events is generated, and the events are analyzed with respect to their energy barri…
cond-mat.dis-nnMaterials Science
Richard Q. Long、Ralph T. Yang1999-05-27OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSuperior Fe-ZSM-5 Catalyst for Selective Catalytic Reduction of Nitric Oxide by AmmoniaRichard Q. Long and Ralph T. YangView Author Information Department of Chemical Engineering University of Michigan Ann Arbor, Michigan 48109-2136 Cite this: J. Am. Chem. Soc. 1999, 1…
Catalytic Processes in Materials ScienceAmmonia Synthesis and Nitrogen ReductionNanomaterials for catalytic reactions
U. Casellato、S. Tamburini、Patrizia Tomasin 等 6 位作者1999-05-26Inorganic Chemistry
The compartmental ligand H(2)L(A), containing an N(3)O(2) Schiff base and an O(2)O(3) crown like coordination site, has been prepared by reaction of 3,3'-(3-oxapentane-1,5-diyldioxy)bis(2-hydroxybenzaldehyde) with 1,5-diamino-3-azamethylpentane. The formation of a [1+1] macrocycle was inferred by IR, NMR, and mass spe…
Magnetism in coordination complexesRadioactive element chemistry and processingLanthanide and Transition Metal Complexes
Laibin Yan、Joseph W. Stucki1999-05-26Langmuir
The reduction of structural Fe affects many surface chemical properties of smectite clay minerals, including their hydration and interfacial forces. To expand our knowledge of these processes, Fourier transform infrared (FTIR) spectroscopy was used to investigate the effects of structural Fe oxidation state and hydrat…
Soil and Unsaturated FlowClay minerals and soil interactionsIron oxide chemistry and applications
Hyunjung Lee、Wonmok Lee、Taihyun Chang 等 8 位作者1999-05-26Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCharacterization of Poly(ethylene oxide)-block-poly(l-lactide) by HPLC and MALDI-TOF Mass SpectrometryHyunjung Lee, Wonmok Lee, Taihyun Chang, Siyoung Choi, Doosung Lee, Haining Ji, William K. Nonidez, and Jimmy W. MaysView Author Information Department of Chemistry and Polymer…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesSilicone and Siloxane Chemistry
Chanel K. Yee、Michael Scotti、Abraham Ulman 等 6 位作者1999-05-26Langmuir
A new one-phase synthesis of thiol-functionalized platinum nanoparticles is presented. Using tetrahydrofuran as the solvent and lithium triethylborohydride (“superhydride”) as the reducing agent, platinum nanoparticles functionalized by octadecanethiol were prepared. Fourier transform infrared spectroscopy (FTIR), tun…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Keiji Fujimoto、Kazumichi Nakahama、Miwako Shidara 等 4 位作者1999-05-26Langmuir
Many synthetic microspheres are spherical and symmetrical because of the thermodynamical limitations of the reaction systems. We developed modification techniques to prepare spherical microspheres with intrinsic unsymmetry, for example, a microsphere with both an anionic and a cationic part. The modification was perfo…
Innovative Microfluidic and Catalytic Techniques InnovationMicro and Nano RoboticsPickering emulsions and particle stabilization
Hitoshi Kumagai、Katsuya Inoue1999-05-26Angewandte Chemie International Edition
Below 5.4 K the one-dimensional polymeric complex made up of manganese(II) hexafluoroacetylacetonate units and bridging bisaminooxylbenzene diradicals (shown in the picture) behaves as a metamagnet. The R-helical chain not only contains an S-configured chiral carbon center, but also an R-configured C2-symmetric chiral…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal Complexes
Rosa Ramirez、Thorsten Poeschel、Nikolai V. Brilliantov 等 4 位作者1999-05-26arXiv
We perform a dimension analysis for colliding viscoelastic spheres to show that the coefficient of normal restitution $ε$ depends on the impact velocity g as ε=1-γ_1g^{1/5}+γ_2g^{2/5}\mp..., in accordance with recent findings. We develop a simple theory to find explicit expressions for coefficients γ_1 and γ_2. Using…
Materials Sciencecond-mat.stat-mech
A. G. Souza Filho、P. T. C. Freire、J. M. Sasaki 等 8 位作者1999-05-26arXiv
We have investigated the behavior of the PbZr(0.94}Ti(0.06)O3 Raman spectra as a function of Hydrostatic pressures. The new structural phases were identified based on previous works performed in PZT system with different Ti concentrations at room- and high pressures. We showed that PbZr(0.94}Ti(0.06}O3 exhibits a rich…
Materials Science
Sudhir Kapoor1999-05-25Langmuir
The reduction of silver ions and their subsequent agglomeration was studied in aqueous solutions in the presence of N -(hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), iminodiacetic acid, 5-aminotetrazole, benzotriazole, and 2-mercaptobenzimidazole as ligands. The presence of ligands i…
Gold and Silver Nanoparticles Synthesis and ApplicationsMetal complexes synthesis and propertiesIron oxide chemistry and applications
Manfred T. Reetz、M. G. Koch1999-05-25Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTWater-Soluble Colloidal Adams Catalyst: Preparation and Use in CatalysisManfred T. Reetz and Michael G. KochView Author Information Max-Planck-Institut für Kohlenforschung, 1 Kaiser-Wilhelm-Platz, D-45470 Mülheim/Ruhr, Germany Cite this: J. Am. Chem. Soc. 1999, 121, 34…
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisCatalysis and Oxidation Reactions
Uwe Kolitsch、Edward R. T. Tiekink、P. G. Slade 等 5 位作者1999-05-25European Journal of Mineralogy
The crystal structures of hinsdalite, PbAl3[(P0.69,S0.31)O4)]2(OH,H2O)6, and of a plumbogummite containing a small amount of arsenic, PbAl3[(P0.95,As0.05)O4)]2(OH,H2O)6, have been refined in space group R3m, with a = 7.029(4) and c = 16.789(4) Å, and a = 7.039(5) and c = 16.761(3) Å, respectively. The refinements, usi…
Crystal Structures and PropertiesLayered Double Hydroxides Synthesis and ApplicationsNuclear materials and radiation effects
C. G. Sonwane、Suresh K. Bhatia、N. J. Calos1999-05-25Langmuir
We report here the characterization of surface roughness of the model mesoporous molecular sieve MCM-41, at various scales of resolution. This material comprises several levels of structure that of the mesopores, the crystallites, the grains, and the particles spanning four decades of resolution, each having its indep…
Hydrocarbon exploration and reservoir analysisTheoretical and Computational PhysicsMesoporous Materials and Catalysis
Milan Novák、J. B. Selway、Petr Černý 等 5 位作者1999-05-25European Journal of Mineralogy
Tourmaline of the elbaite-dravite series from an elbaite-subtype pegmatite at Bližna, southern Bohemia, Czech Republic.
Geological and Geochemical AnalysisCrystal Structures and PropertiesAdvanced Condensed Matter Physics
Yiliang Wu、Qijin Zhang、Akihiko Kanazawa 等 6 位作者1999-05-25Macromolecules
A series of side-chain polymer liquid crystals (PLCs) of 6-[4-(4-ethylphenyl)diazenylphenyloxy]hexyl methacrylate and 4‘-[6-(methacryloyloxy)hexyloxy]-4-cyanobiphenyl were synthesized and characterized. The effects of contents of the azo units and the wavelength of irradiation light on photoinduced alignment behavior…
Liquid Crystal Research AdvancementsPhotochromic and Fluorescence ChemistryMolecular spectroscopy and chirality