K. Rajender Reddy、M.V. Rajasekharan、J.-P. Tuchagues1998-10-29Inorganic Chemistry
The preparation, crystal structures, and variable temperature magnetic susceptibility data are presented for two azido-bridged Schiff base complexes of Mn(III) and Fe(III). Mn(salpn)N(3) (1), where salpn is the dianion of N,N'-bis(salicylidene)-1,3-diaminopropane, crystallizes in the orthorhombic system, space group P…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Nadarajah Vasanthan、N. Sanjeeva Murthy、Robert G. Bray1998-10-29Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTInvestigation of Brill Transition in Nylon 6 and Nylon 6,6 by Infrared SpectroscopyNadarajah Vasanthan, N. Sanjeeva Murthy, and Robert G. BrayView Author Information Engineered Material Sector Laboratories, AlliedSignal Inc., Morris…
Carbon Nanotubes in CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Matthew G. Sexton、Joshua E. S. Socolar、David G. Schaeffer1998-10-29arXiv
We study a scalar lattice model for inter-grain forces in static, non-cohesive, granular materials, obtaining two primary results. (i) The applied stress as a function of overall strain shows a power law dependence with a nontrivial exponent, which moreover varies with system geometry. (ii) Probability distributions f…
Materials ScienceSoft Condensed Matter
Jie Xu、Zhaohua Luan、Heyong He 等 5 位作者1998-10-29Chemistry of Materials
Powder X-ray diffraction (XRD), 29 Si magic-angle-spinning (MAS) NMR spectroscopy, and transmission electron microscopy (TEM) as well as N 2 adsorption have been employed to study the formation of various mesophases that lead to the synthesis of cubic mesoporous MCM-48 molecular sieve. A typical synthesis is performed…
Metal-Organic Frameworks: Synthesis and ApplicationsZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Taihe Deng、Sabrina D. Childress、Karina M. De Fina 等 5 位作者1998-10-28Journal of Chemical & Engineering Data
Experimental solubilities are reported for anthracene dissolved in ternary 1-propanol + 1-butanol + 2,2,4-trimethylpentane, 1-propanol + 2-butanol + 2,2,4-trimethylpentane, 2-propanol + 1-butanol + 2,2,4-trimethylpentane, and 2-propanol + 2-butanol + 2,2,4-trimethylpentane solvent mixtures at 25 °C. Nineteen compositi…
Analytical Chemistry and ChromatographyCrystallization and Solubility StudiesChemical and Physical Properties in Aqueous Solutions
Silverio Coco、Fátima Díez-Expósito、Pablo Espinet 等 6 位作者1998-10-28Chemistry of Materials
Palladium and platinum(II) complexes [MX 2 {C⋮NC 6 H 2 (3,4,5-OC n H 2 n +1 ) 3 } 2 ] (X = Cl, Br, I; n = 4, 6, 8, 10, 12) have been prepared. The free isocyanides are not liquid crystals, but most of their complexes [MX 2 {C⋮NC 6 H 2 (3,4,5-OC n H 2 n +1 ) 3 } 2 ] (M = Pd, Pt; X = Cl, Br, I) show hexagonal columnar p…
Organometallic Complex Synthesis and CatalysisMetal complexes synthesis and propertiesMagnetism in coordination complexes
Harry R. Allcock、Nicolas J. Sunderland、R. Ravikiran 等 4 位作者1998-10-28Macromolecules
Three types of polyphosphazenes with different architectures have been synthesized and characterized. The influence of the polymer architecture on solid ionic conductivity was of particular interest. The first type includes linear oligo- and polyphosphazenes with the general formula [N P(OCH 2 CH 2 OCH 2 CH 2 OCH 3 )…
Advanced Battery Materials and TechnologiesFlame retardant materials and propertiesSynthesis and properties of polymers
Laurent Ruhlmann、Asao Nakamura、Johannes G. Vos 等 4 位作者1998-10-28Inorganic Chemistry
Noncovalent face-to-face heterodimers and -trimers between beta-tetracationic and meso-tetraanionic manganese(III) porphyrins have been prepared in bulk water at pH 12. They are held together by Coulomb interactions between four beta-methylpyridinium and meso-phenylsulfonate or meso-phenylcarboxylate ion pairs in ecli…
Electrochemical sensors and biosensorsPorphyrin and Phthalocyanine ChemistryElectrochemical Analysis and Applications
Götz Winter、Heino Heckmann、Peter Haisch 等 8 位作者1998-10-28Journal of the American Chemical Society
Soluble alkyl ( II, 8a,b ), fluoroalkyl ( 4a ), and fluoroalkoxy ( 4b,c, 8c ) 1,(4)- or 2,(3)-substituted phthalocyaninato- and linear 2,(3)- and angular 1,(2)-annulated naphthalocyaninatotitanium(IV) oxides 10, 12, and 14 were synthesized and characterized with regard to their spectroscopic, photophysical, and photoc…
TiO2 Photocatalysis and Solar CellsPorphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research Studies
Joachim Köhler、Nobuhito Imanaka、Gin‐ya Adachi1998-10-28Chemistry of Materials
The issue “Do trivalent cations conduct in crystalline solids or not?” appears in the basic research of solid-state chemistry and deals with the characteristics and properties of a multivalent cationic current transport through a solid material. Cations in an oxidation state higher than two are not unanimously accepte…
Advancements in Solid Oxide Fuel CellsNuclear materials and radiation effectsElectronic and Structural Properties of Oxides
Guang Wu、Yuegang Zhang、Lynn Ribaud 等 7 位作者1998-10-28Inorganic Chemistry
The Fe-O and Fe-N bond lengths at two iron sites of the mixed-valence complex [Fe(3)O(OOCC(CH(3))(3))(6)(C(5)H(5)N)(3)] show a pronounced temperature dependence; the bonds from two of the Fe atoms to the central oxygen atoms vary by more than 0.10 Å on cooling to 10 K whereas the bond from the third iron atom is essen…
Magnetism in coordination complexesPhotochemistry and Electron Transfer StudiesElectron Spin Resonance Studies
Ana Cristina Sánchez‐Gimeno、Yves Popineau、Cécile Mangavel 等 5 位作者1998-10-28Journal of Agricultural and Food Chemistry
Films were prepared by casting alkaline solutions of gliadin, a major wheat storage protein fraction. Their compositions and mechanical and surface properties were analyzed. Five polyols of the ethylene glycol series and glycerol were compared as plasticizers. The plasticized film-forming solutions exhibited viscositi…
Nanocomposite Films for Food Packagingbiodegradable polymer synthesis and propertiesElectrophoretic Deposition in Materials Science
K. Yvon1998-10-28CHIMIA International Journal for Chemistry
Complex transition-metal hydrides provide new opportunities for hydrogen storage. Their hydrogen-to-metal ratios reach values of up to H/M = 4.5 (BaReH9) and thus surpass the hydrogen-to-carbon ratios of hydrocarbons (methane: H/C = 4); their hydrogen-volume efficiencies exceed that of liquid hydrogen by a factor of u…
Hydrogen Storage and MaterialsNuclear Materials and PropertiesAmmonia Synthesis and Nitrogen Reduction
J. Paul Attfield1998-10-28Chemistry of Materials
A method for parametrizing the A cation size disparity or mismatch in ATO 3 perovskites through the A cation size variance has recently been proposed and experimental studies are reviewed. (A is a mixture of trivalent lanthanide and divalent alkaline-earth cations.) The metal−insulator transition temperature in AMnO 3…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
N.V. Pogodina、H. Henning Winter1998-10-28Macromolecules
Early stages of crystallization of polymers may be viewed as physical gelation. This is shown with four commercial isotactic polypropylenes, which have been studied by dynamic mechanical experiments at low degrees of undercooling, Δ T = 10−26 K, below their nominal melting temperature. The physical gel point is manife…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesRheology and Fluid Dynamics Studies
M. Sifkovits、H. Smolinski、S. Hellwig 等 4 位作者1998-10-28arXiv
Using spin density functional theory we have carried out a comparative study of chemical bonding and magnetism in Fe_4N, Fe_3N and Fe_2N. All of these compounds form close packed Fe lattices, while N occupies octahedral interstitial positions. High spin fcc Fe and hypothetical FeN with rock salt structure have been in…
Materials Science
Anna C. Balazs、Chandralekha Singh、Ekaterina B. Zhulina1998-10-28OpenAlex
Using numerical self-consistent field (SCF) calculations, we investigate the interactions between two closely spaced surfaces and the surrounding polymer melt. Short chains (surfactants) are terminally anchored to each of the surfaces. The coated substrates model organically modified clay crystallites (sheets). Throug…
Material Dynamics and PropertiesPolymer Nanocomposites and PropertiesSurfactants and Colloidal Systems
Raymond Rantanen、Tim Gordon、Miria Finckenor 等 4 位作者1998-10-27Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Contaminant deposition measurement have been made on species content and depth profiles on three experiment trays from the long duration exposure facility (LDEF), Auger, Argon sputtering, ESCA and SEM analysis was used to define the contaminant deposits. The Integrated Spacecraft Environments Model (ISEM) was used to…
Silicone and Siloxane ChemistrySpacecraft Design and TechnologySpacecraft and Cryogenic Technologies
James M. Zwiener、Rachel R. Kamenetzky、Jason Vaughn 等 4 位作者1998-10-27Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
The passive optical sample assembly-I (POSA-I), part of the Mir Environmental Effects Payload (MEEP), was designed to study the combined effects of contamination, atomic oxygen, UV radiation, vacuum, thermal cycling, and other constituents of the space environment on spacecraft materials. The MEEP program is a Phase 1…
Astro and Planetary ScienceSilicone and Siloxane ChemistrySpacecraft Design and Technology
Brooke M. Conger、Dimitris Katsis、John C. Mastrangelo 等 4 位作者1998-10-27The Journal of Physical Chemistry A
A systematic investigation of the effects of stereochemistry and solid-state morphology on emission characteristics were performed using glass-forming pyrenyl and carbazolyl derivatives as neat films in PMMA and cholesteric liquid crystalline glass. At high dilution in tetrahydrofuran, pyrenyl derivatives were prone t…
Photonic and Optical DevicesLiquid Crystal Research AdvancementsPhotorefractive and Nonlinear Optics